CN102846301B - Intelligent adjusting device of endoscope illumination - Google Patents

Abstract

The invention discloses an intelligent adjustment device for the illuminance of an endoscope, which includes a medical endoscope, an image acquisition card, a signal processor, a controller, a switching power supply module and a cold light source; the light emitted by the cold light source is sent into the medical endoscope, The medical endoscope converts the optical signal into an image signal, and transmits the image signal to the signal processor through the image acquisition card through its image output interface; the signal processor receives and processes the image signal transmitted by the image acquisition card, and establishes a classic color The image and its color feature database perform color cast correction and image brightness correction on the images collected in real time, and send the cold light source illumination output control command to the controller; the controller changes the switch control signal according to the received signal processor control command The output phase causes the DC voltage output by the switching power supply module to change accordingly, thereby changing the working voltage of the cold light source, and the output illuminance of the cold light source is optimally adjusted.

Description

Intelligent Adjustment Device of Endoscope Illuminance

technical field

The invention relates to a device in the technical field of automatic control of medical equipment, in particular to an intelligent adjustment device for endoscope illumination. the

Background technique

In recent years, medical endoscope systems have been widely used in clinical medicine. Medical endoscope is a miniature camera system that can put the camera into the human body. Under the illumination of its own light source, the observed target is imaged on the target surface of the image sensor through the optical system, and the optical signal is converted into an electrical signal. After magnification and image processing, a clear magnified image is displayed on the monitor. With the assistance of the endoscope system, doctors can better discover the lesions that occur on the soft and hard tissues in the human body, and allow patients to intuitively and comprehensively understand various problems in their own bodies. These images can also be stored in the patient's database through the corresponding communication interface, together with text, graphics, X-ray film images and other information to form a new generation of electronic medical records, which can be easily accessed and used in consultations, academic reports, etc. , is an important feature of the new medical model. the

Although the endoscope, as a medical device for the diagnosis and treatment of human internal organs, has increasingly shown its important medical significance and role in clinical practice, but there are great differences in its technical performance according to the different manufacturing processes of the endoscope. Among them, using the cold light source to provide appropriate brightness through the light guide to achieve the effect of diagnosis and treatment is the technical realm that doctors strive to pursue when conducting clinical observations. However, it is also a technical problem that has not yet been truly solved by the current supporting technology of endoscopes. This is because the physiological conditions of the internal organs of the human body are extremely complex and changeable. For example, the patient may have water accumulation, stool accumulation, internal pressure fluctuations, visceral peristalsis, etc., causing the observed lesions to be in a very complicated state of motion, and the observed parts are often relatively internal. The image collection point of the speculum is in an unstable state. Once the brightness of the cold light source is insufficient, the distant lesions may be blurred. On the contrary, if the brightness is too strong, it will easily cause flood reflection and diffraction, which will also affect the clarity of the image. In order to obtain good observation results under the complex physiological environment conditions of internal organs, the intelligent automatic adjustment technology of the output light intensity of the cold light source has become a key technology for the accuracy of endoscopic clinical diagnosis. the

The current more popular method is to achieve moderate compensation for imaging clarity through the built-in automatic gain of the CCD. However, this method does not have a dimming function. In addition, the automatic gain adjustment range of the CCD is small, and the gain adjustment module has been integrated into the built-in CCD. It cannot be modified or redeveloped on the existing DSP module, which greatly limits the environment and conditions of clinical use, and requires a high degree of cooperation from patients. Obviously, the output illuminance of the cold light source equipped with the currently used endoscope does not have the intelligent adjustment function, which seriously restricts the clinical use effect of the endoscope. The invention can not only greatly improve the technical level of the existing endoscope, but also can effectively realize the intelligent adjustment of the illuminance of the endoscope. the

After searching the existing technical literature, it was found that the patent "oral microendoscope" (application number: 200810052271.6, not yet authorized) introduces "an oral microendoscope, which has a power supply, a microscopic imaging unit and a lighting unit, And the corresponding image sensor arranged at the end of the microscopic imaging unit, the control unit and the monitor connected to the output end of the image sensor respectively, the power supply is respectively connected to the image sensor and the lighting unit.The microscopic imaging unit has the first to receive the target to be observed The group imaging objective lens is connected with the input end of the image sensor, and the received image is sent to the second group imaging objective lens of the image sensor, and the steering device is arranged between the first group imaging objective lens and the second group imaging objective lens. Lighting unit There is an optical fiber cold light source connected with the power supply, a coupling lens connected with the optical fiber cold light source, and one end is connected with the coupling lens, and the other end is used for illuminating the illumination fiber bundle of the target to be observed. The present invention can observe any details of teeth at will, and can also Continuous observation of details of different sizes has the characteristics of low heat generation, continuous work, adjustment of color temperature, and change of optical fiber output light intensity." However, the "changing optical fiber output light intensity" described in this patent is through manual observation of microscopic image effects, and then by Manually adjust the "color temperature filter" to change the "optical fiber output light intensity". The "control unit" mentioned in the patent specification is only used to deal with "when using a mirror, there is a mirror problem because of an odd number of reflections". Therefore, this technology has a large technical deficiency in the adjustment of "optical fiber output light intensity". the

After searching the existing technical literature, it was found that Liu Tao's "Design and Implementation of Oral Microcavity Imaging System" (2008, Master's Degree Thesis of Tianjin University) "Designed to observe the tiny details in the oral cavity according to the actual needs of dentists for clinical diagnosis. Oral microcavity imaging system for the research and development of oral endoscopic instruments, mainly including the formulation of the overall design scheme of oral endoscopic instruments, the design of oral microcavity imaging optical system, the design of instrument lighting system, the mechanical design of products and prototype products The experimental test and other parts of ", among which, the design of the lighting system is given a more detailed plan, and the lighting of the oral endoscope system provides the selection method of the light source and optical fiber. However, this paper has never involved the optical fiber illumination adjustment technology of the endoscope system. the

Contents of the invention

The purpose of the present invention is to provide an intelligent adjustment device for endoscope illuminance in view of the deficiencies in the prior art above, which can optimize the output intensity of cold light source illuminance by intelligently judging received image information through a signal processor. the

The present invention is realized through the following technical solutions, and the present invention includes: a medical endoscope, an image acquisition card, a signal processor, a controller, a switching power supply module, and a cold light source. The image output interface of the medical endoscope is connected to the input interface of the image acquisition card, the output interface of the image acquisition card is connected to the input interface of the signal processor, the output interface of the signal processor is connected to the input interface of the controller, and the output interface of the controller The interface is connected to the control signal input interface of the switching power supply module, the power input interface of the switching power supply module is connected to the DC output interface, and the output interface of the switching power supply module is connected to the input interface of the cold light source. The illuminance emitted by the cold light source is injected into the medical endoscope, and the medical endoscope converts the light signal into an image signal, and transmits the image signal to the signal processor through the image acquisition card through its image output interface; the signal processor receives the image acquisition card The transmitted image signal is processed, through the establishment of a classic color image and its color feature database, color cast correction and image brightness correction are performed on the real-time collected image, and the cold light source illuminance output control command is sent to the controller; the controller receives the The received signal processor control command changes the output phase of the switch control signal, so that the DC voltage output by the switching power supply module changes accordingly, and then changes the working voltage of the cold light source, so the output illuminance of the cold light source is optimally adjusted. the

The medical endoscope is composed of a head end, a bending part, a main hose, an operating part, a micro-CCD, an image output interface, and a light guide plug to form a mechatronic component. The head part includes: a micro-convex objective lens, the beginning end of the image transmission fiber, and the end of the light-transmission fiber; the micro-convex objective lens is arranged at the front end of the head part to receive reflected light from the surface of the object; the bending part is the head part and the The middle part of the mechanical connection part of the main hose, the rear end of the head end is connected to the front end of the bending part, the rear end of the bending part is connected to the front end of the main hose, the rear end of the image transmission fiber in the main hose is connected to the input of the micro CCD port connection; micro CCD is a micro charge-coupled image sensor, and the micro convex eyepiece and CCD chip have been integrated and solidified at its input interface during production; the output port of the micro CCD is connected to the image output interface; In addition to optical fiber and optical fiber, it also includes a fine steel wire to adjust the viewing angle of the end of the endoscopic lens. The front end of the fine steel wire is mechanically fastened to the front end of the head end, and the rear end of the fine steel wire is connected to the adjustment knob of the operation part. Connection, with the rotation of the adjustment knob of the operation part, the length of the fine steel wire in the main hose can be changed, and then the curvature of the bending part can be changed, so that the peep angle of the head end can be changed; the light-transmitting optical fiber in the main hose The end is connected with the light output port of the light guide plug. The light emitted from the cold light source is sent to the light-transmitting optical fiber by the light input port of the light guide plug, and the cold light source beam is transmitted to the head end to illuminate the observed object or field of view through the light-transmitting optical fiber. In order to make the illuminance of the entire field of view uniform, the illumination range of the light-transmitting fiber should be larger than the viewing angle. Therefore, not only the diameter of the light-transmitting fiber is required to be as small as possible, the flexibility is good, but also a higher numerical aperture is required to improve the illuminance of the field of view. Require. After the reflected light of the observed object is converged by the micro-convex objective lens at the end of the head, it is imaged on the end face of the image-transmitting fiber, transmitted through the image-transmitting fiber, and then magnified by the micro-convex eyepiece and projected onto the target surface of the CCD. Through photoelectric conversion, the optical signal is converted into an image pixel sequence electrical signal, and the image signal is transmitted to the signal processor through the image acquisition card through the image output interface. the

The signal processor includes: an input interface, a signal processing module, a database module, and an output interface. The input port of the input interface receives the digital image signal output from the image acquisition card, and the output port of the input interface is connected with the input port of the signal processing module; the output port of the signal processing module is connected with the input port of the output interface; the database module is used as the memory of the signal processor The module performs data interaction with the signal processing module through the data bus; the output port of the output interface is connected with the input interface of the controller. the

和三均值之间的最大与最小值。  The structure of the database module is composed of areas, and each area stores classic color images of human organs and their color feature data, such as: the esophagus area stores classic color images of esophageal endoscopes and their color feature data, and the stomach area stores the internal color images of the stomach wall. The classic color image of the endoscope and its color feature data, and the colon area stores the classic color image of the colon wall endoscope and its color feature data. The color features include: pixel values R ₀ (u,v), G ₀ (u,v), B ₀ (u, v) and its matching ratio coefficient, mean

The maximum and minimum values between and the three means.

R ₀ (u,v), G ₀ (u,v), and B ₀ (u,v) are also called classical image pixel values, and their average values are

$\left\{\begin{array}{c}{\stackrel{\‾}{R}}_0(u,v)=\frac{1}{m\×\mathrm{no}}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{\mathrm{no}}{\mathrm{\Σ}}}{R}_0(u,v)\\ {\stackrel{\‾}{G}}_0(u,v)=\frac{1}{m\×\mathrm{no}}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{\mathrm{no}}{\mathrm{\Σ}}}{G}_0(u,v)\\ {\stackrel{\‾}{B}}_0(u,v)=\frac{1}{m\×\mathrm{no}}\underset{v=1}{\overset{m}{\mathrm{\Σ}}}\underset{u=1}{\overset{\mathrm{no}}{\mathrm{\Σ}}}{B}_0(u,v)\end{array}\right.$ (Formula 1)

and its comprehensive mean value J ₀ is

$J_0=\frac{1}{r+g+b}[r{\stackrel{\‾}{R}}_0(u,v)+g{\stackrel{\‾}{G}}_0(u,v)+b{\stackrel{\‾}{B}}_0(u,v)]$ (Formula 2)

Among them, m and n are the number of rows and columns of the image coordinates respectively; r, g and b are the matching ratio coefficients of the three primary colors R, G and B respectively. the

The maximum and minimum values among the three means are

$\left\{\begin{array}{c}{I}_{0\max }(u,v)=\max [{\stackrel{\‾}{R}}_0(u,v),{\stackrel{\‾}{G}}_0(u,v),{\stackrel{\‾}{B}}_0(u,v)]\\ I_{0\min }(u,v)=\min [{\stackrel{\‾}{R}}_0(u,v),{\stackrel{\‾}{G}}_0(u,v),{\stackrel{\‾}{B}}_0(u,v)]\end{array}\right.$ (Formula 3)

Among them, (u, v) are the pixel coordinates of the image collected by the endoscope, and u and v represent the column and row coordinate values of the image respectively. the

I _0max (u,v) and I _0min (u,v) are respectively called the maximum and minimum luminance output of the classic image.

The signal processing module processes the received image signal, first respectively obtains the R, G, B three primary color pixel values and their mean values of the RGB real-time color image, then performs color cast correction on the real-time collected image, and then selects the color cast The maximum and minimum values of the corrected three primary color pixel values are corrected for image brightness, and then the average value of image pixels after image brightness correction and its comprehensive average are calculated, and the comprehensive average value of image pixels after image brightness correction is compared with the classic The size of the comprehensive average value of the image pixels will finally output the control command to adjust the illuminance of the cold light source to the controller. the

Compared with prior art, the present invention has following beneficial effect:

①It makes the clinical operation of the endoscope very simple, and the clinician can concentrate on finding and observing the lesion without having to worry about adjusting the illumination; ②No matter how the endoscope is bent, the illumination can be intelligently adjusted and optimized. Therefore, the present invention is a new technology that can save time and trouble, and improve the effect and efficiency of medical diagnosis. the

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention;

Fig. 2 is a structural block diagram of the signal processor in the present invention. the

Detailed ways

The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment. the

As shown in FIG. 1 , this embodiment includes: a medical endoscope 1 , an image acquisition card 2 , a signal processor 3 , a controller 4 , a switching power supply module 5 , and a cold light source 6 . The image output interface of medical endoscope 1 is connected with the input interface of image acquisition card 2, the output interface of image acquisition card 2 is connected with the input interface of signal processor 3, the output interface of signal processor 3 is connected with the input interface of controller 4 Connection, the output interface of the controller 4 is connected to the control signal input interface of the switching power supply module 5, the power input interface of the switching power supply module 5 is connected to the 12V DC output interface, and the output interface of the switching power supply module 5 is connected to the input interface of the cold light source 6 . The light emitted from the cold light source 6 sends the light beam of the cold light source 6 into the light transmission fiber through the light input port of the light guide plug, and transmits the light beam of the cold light source 6 to the head end to illuminate the observed object or field of view through the light transmission fiber. the

The medical endoscope adopts an endoscope with a specification model of 0°/φ4×170 (mm), that is, the plane of the objective lens at the head end is parallel to the section of the curved part, or the angle of intersection is 0°, and the outer diameter is 4mm. The hose length (that is, the total length of the bend and the main hose) is 170mm. After the reflected light of the observed object is converged by the micro-convex objective lens at the head end, it is imaged on the end face of the image-transmitting fiber, transmitted through the image-transmitting fiber, and then magnified by the micro-convex eyepiece, and then projected onto the target surface of the CCD Through photoelectric conversion, the optical signal is converted into an image pixel sequence electrical signal, and the image signal is transmitted to the signal processor 3 through the image acquisition card 2 through the image output interface. the

As shown in FIG. 2 , the signal processor 3 includes: an input interface 31 , a signal processing module 32 , a database module 33 , and an output interface 34 . Input interface 31 input ports receive the digital image signal from image acquisition card 2 output, input interface 31 output ports are connected with the input port of signal processing module 32; The output port of signal processing module 32 is connected with the input port of output interface 34; Database module 33 acts as the memory module of the signal processor 3 to perform data interaction with the signal processing module 32 through the data bus; the output port of the output interface 34 is connected to the input interface of the controller 4 . the

The structure of the database module 33 is composed of areas, and each area stores classic color images inside human organs and their color feature data. The classic image, that is, the internal color image of human organs with excellent color and clarity obtained by the endoscope image sensor, is called the classic color image inside human organs, referred to as classic image, such as: esophageal endoscope stored in the esophagus The classic color image and its color feature data, the stomach area stores the classic color image of the gastric wall endoscope and its color feature data, the colon area stores the classic color image of the colon wall endoscope and its color feature data, etc. The color features include: pixel values R ₀ (u,v), G ₀ (u,v), B ₀ (u, v) and its matching ratio coefficient, mean The maximum and minimum values between and the three means.

R ₀ (u,v), G ₀ (u,v), and B ₀ (u,v) are also called classical image pixel values, and their average values are

$\left\{\begin{array}{c}{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\end{array}\right.$

and its comprehensive mean value J ₀ is

${\mathrm{<span\; class="notranslate">\; J</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; g</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; r</span>}{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; g</span>}{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>$

Among them, m and n are the number of rows and columns of the image coordinates respectively; r, g and b are the matching ratio coefficients of the three primary colors R, G and B respectively. the

The maximum and minimum values among the three means are

$\left\{\begin{array}{c}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; max</span>}<span\; class="notranslate">\; [</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>\\ {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; min</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; min</span>}<span\; class="notranslate">\; [</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>\end{array}\right.$

Among them, (u, v) are the pixel coordinates of the image collected by the endoscope, and u and v respectively represent the column and row coordinate values of the image. the

I _0max (u,v) and I _0min (u,v) are respectively called the maximum and minimum luminance output of the classic image.

The signal processing module 32 processes the received image signal, first respectively obtains the R, G, B three primary color pixel values and their mean values of the RGB real-time color image, then performs color cast correction to the image collected in real time, and then selects the color cast The maximum and minimum values of the three primary color pixel values after color correction are used to correct the image brightness, and then the mean value of the image pixels after image brightness correction and its comprehensive mean are calculated, and the comprehensive mean value of the image pixels after image brightness correction is compared with The size of the comprehensive mean value of the classic image pixels, and finally adjust the illuminance output of the cold light source. The detailed implementation process is as follows:

即  (1) According to the real-time color image output by the endoscope image sensor, obtain the R, G, and B three primary color pixel values R ₁ (u,v), G ₁ (u,v), B ₁ ( u, v), and calculate the average value of the three primary color pixels of the entire image

Right now

$\left\{\begin{array}{c}{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\end{array}\right.$

R ₁ (u,v), G ₁ (u,v), and B ₁ (u,v) are also called real-time image three primary color pixel values.

(2) Perform color cast correction on the images collected in real time, namely

$\left\{\begin{array}{c}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>}{{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>}{{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>}{{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\end{array}\right.$

R ₂ (u,v), G ₂ (u,v), and B ₂ (u,v) are called three primary color pixel values after color cast correction.

(3) Select the maximum and minimum values of the average values of the three primary color pixels after color cast correction, namely

$\left\{\begin{array}{c}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; max</span>}<span\; class="notranslate">\; [</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>\\ {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; min</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; min</span>}<span\; class="notranslate">\; [</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>\end{array}\right.$

Among them, the average value of the three primary color pixels after color cast correction is

$\left\{\begin{array}{c}{\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ {\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\end{array}\right.$

I _2max (u,v) and I _2min (u,v) are respectively called the maximum and minimum luminance output of the image after color cast correction.

(4), image brightness correction, namely

$\left\{\begin{array}{c}\stackrel{<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\sqrt{\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; max</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; min</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; min</span>}}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ \stackrel{<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\sqrt{\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; max</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; min</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; min</span>}}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}}}{\mathrm{<span\; class="notranslate">\; G</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ \stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\sqrt{\frac{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; max</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}\mathrm{<span\; class="notranslate">\; min</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; min</span>}}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; max</span>}}}}{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\end{array}\right.$

被分别称为亮度校正后的图像像素值。 

are respectively referred to as brightness-corrected image pixel values.

(5) Calculate the average value of image pixels after image brightness correction Right now

$\left\{\begin{array}{c}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ \stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\stackrel{<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\\ \stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}}\underset{\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\underset{\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\stackrel{<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span>\end{array}\right.$

Find its comprehensive mean value J:

$\mathrm{<span\; class="notranslate">\; J</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; g</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; r</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; g</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\stackrel{<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>}{\mathrm{<span\; class="notranslate">\; G</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; b</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\stackrel{<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>}{\mathrm{<span\; class="notranslate">\; B</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>$

(6) Compare J with the size of J ₀ in the database, and adjust the illuminance output of the cold light source.

When JJ ₀ ≠0, send a control command to the cold light source to adjust the illuminance output of the cold light source. The specific control method is as follows,

$\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; J</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; J</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}{\mathrm{<span\; class="notranslate">\; K</span>}}\\ {\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; min</span>}}<span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&le;</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\end{array}\right.$

Among them, V(t) is the working voltage of the cold light source at the current moment, V(t+1) is the working voltage of the cold light source at the next moment, V _max and V _min are the rated maximum and minimum working voltages of the cold light source respectively.

Therefore, the intelligent adjustment of the illuminance of the endoscope is always realized throughout the medical process, so that the optimization effect of the illuminance can be obtained when observing and computer processing and analyzing the images of the internal organs of the human body. the

The controller 4, according to the received control instruction of the signal processor 3, changes the time when the leading edge of its output switch signal appears, that is, the output phase of the switch control signal, so that the DC voltage output by the switching power supply module 5 produces a corresponding change, and then The working voltage of the cold light source 6 is changed, and the output illuminance of the cold light source 6 is adjusted accordingly. the

The switching power supply module 5 is a direct-to-direct switching power supply circuit with controllable output voltage composed of power electronic switching devices. The controller 4 can generate a pulse control signal according to the control instruction of the signal processor 3, and transmit the pulse control signal to the control signal input terminal of the switching power supply module 5; the switching power supply module 5 can input the DC voltage therein according to the pulse control signal The signal is chopped, and the chopped signal has a corresponding duty cycle. Through filtering and smoothing, a DC voltage output corresponding to the control command of the signal processor 3 is output. the

As for the cold light source, the cold light source is a light source excited by chemical energy, electric energy, and biological energy, and has very good optical flickering characteristics. Because its luminous temperature is lower than the ambient temperature, it is called cold light, and this type of light source is called cold light source. The luminescent principle of the cold light source is that under the action of an electric field, electrons collide to excite the fluorescent material to produce luminescence. The cold light source is characterized by converting almost all other energies into visible light. The cold light source 6 described in this embodiment adopts XD-300 series medical endoscope cold light source. the

In this embodiment, the light emitted by the cold light source is sent into the medical endoscope, and the medical endoscope converts the light signal into an image signal, and transmits the image signal to the signal processor through the image acquisition card through its image output interface; the signal processing The receiver receives and processes the image signal transmitted by the image acquisition card, and performs color cast correction and image brightness correction on the real-time collected image by establishing a classic color image and its color feature database, and sends the cold light source illumination output control command to the controller The controller changes the output phase of the switch control signal according to the received signal processor control instruction, so that the DC voltage output by the switching power supply module changes accordingly, and then changes the working voltage of the cold light source, and the output illuminance of the cold light source is optimally adjusted. the

The present invention can optimize the output intensity of the illuminance of the cold light source through the intelligent judgment of the received image information by the signal processor, and realize the intelligent adjustment of the illuminance of the endoscope: ①The clinical operation of the endoscope is very simple, and the clinician does not need to adjust the illuminance No matter how the endoscope bends, its illumination can be intelligently adjusted and optimized, and high-quality and clear endoscopic images can be obtained regardless of manual observation or computer processing. the

Claims (6)

1. an intelligent regulating device for endoscope's illumination, is characterized in that, comprising: medical endoscope, image pick-up card, signal processor, controller, switch power module and cold light source; The image output interface of medical endoscope is connected with the input interface of image pick-up card, the output interface of image pick-up card is connected with the input interface of signal processor, the output interface of signal processor is connected with the input interface of controller, the output interface of controller is connected with the control signal input interface of switch power module, the power input interface of switch power module is connected with unidirectional current output interface, and the output interface of switch power module is connected with the input interface of cold light source; The illuminance that cold light source sends is injected medical endoscope, and optical signal is transformed into picture signal by medical endoscope, and sends picture signal to signal processor through image pick-up card by its image output interface; Signal processor receives the picture signal of image pick-up card transmission and processes, by setting up classical color image and color characterization data storehouse thereof, the image of Real-time Collection is carried out to colour cast correction, brightness of image correction, and send cold light source illumination output control instruction to controller; Controller is according to the signal processor control instruction receiving, change switch controlling signal output phase, make the DC voltage of switch power module output produce corresponding variation, and then changed the running voltage of cold light source, therefore cold light source output illumination obtains to optimize and regulates;

Described signal processor comprises: input interface, signal processing module, DBM and output interface; Wherein: input interface input port receives the data image signal from image pick-up card output, and input interface output port is connected with the input port of signal processing module; The output port of signal processing module is connected with the input port of output interface; DBM carries out data interaction as the memory modules of signal processor by data/address bus and signal processing module; The output port of output interface is connected with the input interface of controller;

Described signal processing module is processed the picture signal receiving, first obtain respectively the R of RGB real-time color image, G, B three primary colours pixel value and average thereof, then the image of Real-time Collection is carried out to colour cast correction, choose again the maximal and minmal value in the three primary colours pixel value after colour cast is proofreaied and correct, carry out brightness of image correction, then ask for image pixel average and comprehensive mean thereof after brightness of image is proofreaied and correct, by the size of classical image pixel comprehensive mean in the image pixel comprehensive mean after movement images gamma correction and data base, the control instruction that regulates cold light source illumination is exported to controller.

2. the intelligent regulating device of endoscope according to claim 1 illumination, is characterized in that, described DBM, and its structure is made up of district, the inner classical color image of each district's storage human organ and color characterization data thereof; The inner classical color image of described human organ, the inner coloured image of all good human organs of the color being obtained by endoscopic images sensor and definition;

Described color character, comprising: three primary colours R(is red in RGB color space), G(is green), B(indigo plant) pixel value R ₀(u, v), G ₀(u, v), B ₀(u, v) and matching ratio coefficient thereof, average

and three maximal and minmal value between average.

3. the intelligent regulating device of endoscope according to claim 1 illumination, is characterized in that, described medical endoscope is made up of cephalic par, bending section, main flexible tube, operating portion, miniature CCD, image output interface, leaded light plug; Wherein cephalic par comprises miniature convex lens object lens, image transmission optical fibre top, Optic transmission fiber end, and miniature convex lens object lens are arranged at the front end of cephalic par, for receiving the reflected light from body surface; Bending section is the stage casing mechanical connecting element of cephalic par and main flexible tube, and the rear end of cephalic par is connected with the front end of bending section, and the rear end of bending section is connected with the front end of main flexible tube, and the image transmission optical fibre rear end in main flexible tube is connected with the input port of miniature CCD; Miniature CCD is miniature charge-coupled image sensor, and the output port of miniature CCD is connected with image output interface; Optic transmission fiber rear end in main flexible tube is connected with leaded light plug optical output port.

4. the intelligent regulating device of endoscope according to claim 3 illumination, it is characterized in that, described leaded light plug light input end mouth is sent cold light source light beam into Optic transmission fiber, through Optic transmission fiber by cold light source beam Propagation to cephalic par throw light on observed object or visual field, the reflected light of observed object is after cephalic par obtains miniature convex lens object lens and converges, image on the end face of image transmission optical fibre, spread out of through image transmission optical fibre, again after miniature convex lens eyepiece amplifies, project on the target surface of CCD and pass through opto-electronic conversion, optical signal is transformed into the image pixel sequence signal of telecommunication, by image output interface, picture signal is transferred to signal processor through image pick-up card.

5. the intelligent regulating device of endoscope according to claim 3 illumination, it is characterized in that, described main flexible tube is except parcel image transmission optical fibre and Optic transmission fiber, also comprising one regulates endoscope head end to spy on the fine steel wire of angle, the front end of fine steel wire and the front end robot of cephalic par are fastening, and the rear end of fine steel wire is connected with the adjusting knob of operating portion.

6. the intelligent regulating device of endoscope according to claim 1 illumination, is characterized in that, described switch power module is controlled straight-straight switching power circuit of output voltage being made up of electronic power switch device.

Images