CN104333707B - Camera parameter method of adjustment and system - Google Patents

Abstract

The present invention provides a method and system for adjusting camera parameters. The method includes the steps of: controlling the camera to be adjusted to collect images under the current exposure parameters to obtain image data, and performing pixel statistics on the currently obtained image data to obtain pixel distribution data; The obtained pixel distribution data calculates the preset currently calculated evaluation value; judges whether the currently calculated evaluation value meets the preset adjustment success condition, if not, selects the corresponding adjustment gear according to the currently calculated evaluation value and Gear adjustment direction, adjust the exposure parameters of the camera according to the number of adjustment gears currently selected and the gear adjustment direction, use the adjusted exposure parameters as the new current exposure parameters, and return to the control to be adjusted in the current exposure of the camera A step of collecting images under the parameters to obtain image data; if yes, ending the adjustment of the camera parameters. By adopting the scheme of the present invention, automatic adjustment of camera parameters can be realized, and adjustment efficiency can be improved.

Description

Camera parameter adjustment method and system

technical field

The invention relates to the field of optoelectronic technology, in particular to a camera parameter adjustment method and system.

Background technique

With the rapid development of optoelectronic technology and the increasing demand of users, people have more and more applications for cameras in daily life, and cameras that can shoot high-quality images (especially SLR cameras) have become the development direction of this field. one. The traditional method of adjusting camera parameters is manual. For some fields that require high image quality, it is often necessary to repeatedly adjust the parameters, otherwise the captured images cannot meet the application requirements. For example, when calibrating the LED display screen, in order to save the calibration cost, the camera is often used for data collection, and the accuracy of the collected data directly affects the collection effect, so it is also necessary to repeatedly adjust the parameters of the camera until it meets the requirements. This will take a certain amount of time, and the adjustment efficiency is low.

Contents of the invention

The object of the present invention is to provide a method and system for adjusting camera parameters, which can realize automatic adjustment of camera parameters and improve adjustment efficiency.

The purpose of the present invention is achieved through the following technical solutions:

A camera parameter adjustment method, comprising the steps of:

Control the camera to be adjusted to collect images under the current exposure parameters to obtain image data, and perform pixel statistics on the currently obtained image data to obtain pixel distribution data;

Calculate the evaluation value of the currently collected image according to the currently obtained pixel distribution data and the preset evaluation function;

Judging whether the currently calculated evaluation value satisfies the preset adjustment success condition;

If not, select the corresponding adjustment gear number and gear adjustment direction according to the currently calculated evaluation value, adjust the exposure parameters of the camera according to the currently selected adjustment gear number and gear adjustment direction, and convert the adjusted exposure The parameter is used as a new current exposure parameter, and returns to the step of controlling the camera to be adjusted to collect an image under the current exposure parameter to obtain image data;

If yes, end the adjustment of the camera parameters.

A camera parameter adjustment system, comprising the steps of:

The data collection module is used to control the camera to be adjusted to collect images under the current exposure parameters to obtain image data;

The data statistics module is used to perform pixel statistics on the currently obtained image data to obtain pixel distribution data;

A calculation module, configured to calculate the evaluation value of the currently collected image according to the currently obtained pixel distribution data and a preset evaluation function;

a judging module, configured to judge whether the currently calculated evaluation value satisfies a preset adjustment success condition,

An adjustment module, configured to select a corresponding number of adjustment gears and a gear adjustment direction according to the currently calculated evaluation value when the judgment result of the judgment module is negative, and adjust Directly adjust the exposure parameters of the camera, use the adjusted exposure parameters as the new current exposure parameters, and control the data acquisition module to perform the process of controlling the camera to be adjusted to collect images under the current exposure parameters to obtain image data. When the determination result of the determination module is yes, the adjustment of the camera parameters is ended.

According to the above solution of the present invention, it is to control the camera to be adjusted to collect images under the current exposure parameters to obtain image data, and perform pixel statistics on the currently obtained image data to obtain pixel distribution data, and calculate the preset according to the currently obtained pixel distribution data According to the currently calculated evaluation value, judge whether the currently calculated evaluation value meets the preset adjustment success conditions. If not, select the corresponding adjustment gear number and gear adjustment direction according to the current calculated evaluation value. Adjust the number of adjustment gears and the gear adjustment direction to adjust the exposure parameters of the camera, use the adjusted exposure parameters as the new current exposure parameters, and return the control to the camera to be adjusted to collect images under the current exposure parameters to obtain image data Step, if yes, end the adjustment of the camera parameters, which can realize the automatic adjustment of the camera parameters without any operation by the user, which improves the efficiency of the camera parameter adjustment.

Description of drawings

FIG. 1 is a schematic flowchart of an embodiment of a camera parameter adjustment method of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the camera parameter adjustment system of the present invention;

FIG. 3 is a schematic structural diagram of another embodiment of the camera parameter adjustment system of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

In the following description, the embodiment of the camera parameter adjustment method of the present invention will be described first, and then the embodiments of the camera parameter adjustment system of the present invention will be described.

Referring to FIG. 1 , it is a schematic flowchart of an embodiment of a camera parameter adjustment method of the present invention. As shown in Figure 1, the camera parameter adjustment method of the present invention comprises the following steps:

Step S101: Control the camera to be adjusted to collect images under the current exposure parameters to obtain image data, and enter step S102;

For the data acquisition when the LED display screen is calibrated, what is collected is the image when the LED display screen displays a color in R (red), G (green), and B (blue), but the present invention is not limited to only collecting A way of coloring an image;

Step S102: Perform pixel statistics on the currently obtained image data to obtain pixel distribution data, and proceed to step S103;

The pixel value of each pixel point in the currently obtained image data can be extracted, and pixel distribution data can be obtained according to the extracted pixel value of each pixel point, wherein the pixel value distribution data refers to pixel values corresponding to different pixel values ( Or called the number of pixels), for example, for image data with an image resolution of 100×100, there are 10,000 pixels in total, and the pixel values of these 10,000 pixels can be extracted respectively, and then based on the 10,000 pixels The pixel value of the point determines the number of pixel values with a pixel value of 0 (or called the number of pixel points), the number of pixel values with a pixel value of 1 (or called the number of pixel points), and the number of pixel values with a pixel value of 2 (or called the number of pixel points), the number of pixel values (or called the number of pixel points) with a pixel value of 3 ... the number of pixel values (or called the number of pixel points) with a pixel value of 255;

Step S103: Calculate the evaluation value of the currently collected image according to the currently obtained pixel distribution data and the preset evaluation function, and proceed to step S104;

Wherein, the form of the evaluation function can be set according to actual needs. In one embodiment, the form of the evaluation function can be shown in the following formula (1):

Among them, K ₁ , K ₂ , ..., K _n represent the preset saturation coefficient parameters of each pixel value interval, X ₁ , X ₂ , ..., X _n represent the number of pixel values in each pixel value interval, and N represents each pixel value The sum of the number of pixel values in the value interval, Y represents the evaluation value of the evaluation function;

It should be noted that the number of pixel value intervals here and the upper and lower limit values corresponding to each pixel value interval can be set according to actual needs, which can be divided into multiple The pixel value interval can also be divided into multiple pixel value intervals according to the set method according to the actual needs. For example, if the known pixel value is less than 80, the impact on judging the camera exposure status is very small. Then only the part 80~255 can be divided into multiple pixel value intervals according to the set method. In addition, the pixel value intervals here include the commonly referred to numerical intervals, but since a single data can be regarded as an upper limit and a lower limit Numerical intervals with the same value, therefore, a single pixel value can also be collectively referred to as a pixel value interval, and in the present invention, it will be described as a collectively referred to as a pixel value interval;

The above parameters of the saturation coefficient can be set according to the actual situation. Specifically, since the size and clarity of different LED images such as focal length, focus, and camera position may also be different in actual applications, one should be selected within the range that may be used. In the intermediate state (the imaging size is in the middle, and the focus definition is also in the middle) to set the saturation coefficient parameters;

For example, in the selected intermediate state, a reference image is taken, and the number of pixel values in each pixel value interval is counted. For example, the statistical results are shown in Table 1:

Table 1

pixel value range 80-120 121-170 171-230 231-254 255 number of pixel values _{x5 x4 x3 x2 x1} Saturation coefficient weight K ₅ K ₄ K ₃ K ₂ K ₁

The distribution characteristics of each LED pixel in the exactly saturated state (critical state): 1 pixel is between 231-254, 10 pixels are between 170-230, and 20 pixels are between 121-170. The rest are between 80-120, assuming that the unsaturated LED image points cover 80-255 pixel values and the number of pixel values is 50; because the brightness of each LED point of the LED screen has a certain degree of dispersion (some are brighter, some darker), you can set the weight coefficient from the perspective of probability, as follows (because the number of LED points in the picture is unknown, the following is described in percentage, and an LED point corresponds to 50 pixels as an example):

If the center value pixel of one LED point in 1/100 of the LED points is allowed to be 255, set X ₁ =5000 at this time, if the center value pixel of one LED point in 1/10 of the LED points is allowed to be 231-254 , set X ₂ =500 at this time, if each LED point has about 10 pixels distributed in 171-230, then at this time, X ₃ =1/10, if each LED point has about 20 pixels The distribution is 121-170, then at this time, X ₄ =1/20, since the coefficient of X ₅ has little reference value, a smaller coefficient can be set: for example, e=1/200;

Then, after setting the above saturation coefficient parameters, when the picture is just undersaturated, the calculated Y value is around 1-10; if the picture is overexposed, the number of pixels in the 231-255 range must increase exponentially, and the Y value will be much greater than 10;

The process of calculating the preset currently calculated evaluation value according to the currently obtained pixel distribution data may be: according to the currently obtained pixel distribution data, determine the number of pixel values X ₁ , X ₂ , ..., X in each of the pixel value intervals _n and the sum value N, the currently calculated evaluation value Y is calculated according to the number of pixel values X ₁ , X ₂ , ..., X _n in each of the pixel value intervals, that is, the currently determined The number of pixel values X ₁ , X ₂ , ..., X _n in each pixel value interval and the sum N are substituted into the above formula (1) to calculate the current function value in the evaluation function;

Step S104: Determine whether the currently calculated evaluation value satisfies the preset adjustment success condition, if not, go to step S105, if yes, go to step S106;

The method of judging whether the currently calculated evaluation value satisfies the preset adjustment success condition can be to judge whether the currently calculated evaluation value is the same as the preset target value, or to judge whether the currently calculated evaluation value falls within the preset target value. within the target range;

Step S105: Select the corresponding number of adjustment gears and gear adjustment direction according to the currently calculated evaluation value, adjust the exposure parameters of the camera according to the currently selected number of adjustment gears and gear adjustment direction, and set the adjusted exposure parameter as the new current exposure parameter, return to step S101;

Those skilled in the art should be able to understand that when the difference between the currently calculated evaluation value and the adjustment success condition is large, the number of adjustment gears is also large; when the difference between the currently calculated evaluation value and the adjustment success condition is small, the adjustment gear The number is also small, and the gear should be lowered during overexposure. It can also be called the downshift direction, and the gear should be raised when underexposure. It can also be called the upshift direction. In practical applications , you can set the number of adjustment gears and gear adjustment direction corresponding to different evaluation value intervals according to actual needs, and then you can select the corresponding adjustment gear number and gear adjustment according to the evaluation value interval where the currently calculated evaluation value is located. direction, and then adjust the exposure parameters of the camera according to the currently selected number of adjustment gears and the gear adjustment direction (that is, adjust the gear);

In one of the embodiments, selecting the corresponding number of adjustment gears and gear adjustment direction according to the currently calculated evaluation value may specifically include the steps of: determining the evaluation value interval corresponding to the evaluation value according to the currently calculated evaluation value; The determined evaluation value interval and the binding relationship between the pre-stored evaluation value interval and the number of adjustment gears and the direction of gear adjustment select the number of adjustment gears and the direction of gear adjustment corresponding to the currently calculated evaluation value;

Step S106: End the adjustment of the camera parameters.

Accordingly, according to the solution of the above-mentioned embodiment, it is to control the camera to be adjusted to collect images under the current exposure parameters to obtain image data, and perform pixel statistics on the currently obtained image data to obtain pixel distribution data. According to the currently obtained pixel distribution data Calculate the preset currently calculated evaluation value, judge whether the currently calculated evaluation value meets the preset adjustment success condition, if not, select the corresponding adjustment gear number and gear adjustment direction according to the current calculated evaluation value, Adjust the exposure parameters of the camera according to the number of adjustment gears currently selected and the adjustment direction of the gear positions, use the adjusted exposure parameters as the new current exposure parameters, and return the control to the camera to be adjusted to collect images under the current exposure parameters to obtain In the step of image data, if yes, the adjustment of the camera parameters is ended, and the automatic adjustment of the camera parameters can be realized without any operation by the user, which improves the efficiency of the adjustment of the camera parameters.

In addition, as mentioned above, when selecting the corresponding number of adjustment gears and gear adjustment direction according to the currently calculated evaluation value, it can be selected based on the binding relationship between the evaluation value range, the number of adjustment gears, and the direction of gear adjustment. In order to make the binding relationship between the pre-stored evaluation value range and the number of adjustment gears and gear adjustment direction satisfy various situations, such as different camera focal lengths or different focus states, in one embodiment, the evaluation value range and The binding relationship of adjusting the number of gears and the direction of gear adjustment can be obtained through the following methods:

Change the exposure parameters of the camera when the camera is in the current focal length and the current focus state, and obtain the image data obtained by controlling the camera to collect images when obtaining the exposure parameters, and calculate each according to the image data and the evaluation function respectively. The evaluation value of the corresponding image, and determine the corresponding relationship between the evaluation value and the camera gear according to the calculated evaluation value. Or the current focusing state is used as the new current focal length or current focusing state, and returns the result obtained by controlling the camera to collect images when the camera is in the current focal length and current focusing state, changing each exposure parameter of the camera and obtaining each exposure parameter In the image data step, when the acquisition completion condition is met, the binding relationship between the evaluation value range, the number of adjustment gears, and the gear adjustment direction is determined according to the corresponding relationship between the evaluation value determined each time and the camera gear position.

Among them, the way to change the current focal length can be to add or subtract a predetermined focal length step to the current focal length each time, to change the current focus state is to change the focus state from a focus state to a further focus state, and the acquisition completion condition can be to traverse The focal length of each length is traversed and each focus state is traversed;

The corresponding relationship between the evaluation value determined each time and the camera gear position can be integrated to determine the binding relationship between the evaluation value range, the number of adjustment gears, and the gear adjustment direction. For example, the corresponding relationship between the evaluation value determined for the first time and the camera gear position Including the camera gear corresponding to the evaluation value A (or called the evaluation value range A) is 10 gears, and the camera gear corresponding to the evaluation value B (or called the evaluation value range B) is 3 gears, if the evaluation value B (or called the evaluation value range B) is 3 gears, if the evaluation value B (or called The camera gear corresponding to the evaluation value interval B) is the gear corresponding to the optimal exposure parameter, then the number of adjustment gears corresponding to the evaluation value A (or evaluation value interval A) this time is 7, and the gear adjustment direction is The downshift direction, similarly, can determine the number of adjustment gears and the gear adjustment direction corresponding to the evaluation value A (or called the evaluation value interval A) each time, and each corresponding evaluation value A (or called the evaluation value interval A) ) to determine the number of adjustment gears bound to the evaluation value A (or called the evaluation value interval A), and each corresponding evaluation value A (or called the evaluation value interval A) The gear adjustment direction with the largest number of gear adjustment directions is determined as the gear adjustment direction bound to the evaluation value A (or called the evaluation value interval A).

In this embodiment, since the binding relationship between the numerical range and the number of gears to be adjusted and the direction of gear adjustment is obtained by comprehensively considering each focal length, each focus state, and each exposure parameter, various situations can be satisfied.

In addition, in order to prevent an infinite loop from occurring in some extreme cases when adjusting the exposure parameters of the camera, for example, after the K level was raised last time, the K level needs to be lowered according to the evaluation value of the newly determined evaluation function In one embodiment, the step of adjusting the exposure parameters of the camera according to the currently selected number of adjustment gears and the gear adjustment direction includes the step of: if the current number of adjustment gears is the same as If the number of adjustment gears in the last adjustment is the same and the current gear adjustment direction is opposite to that of the last adjustment, then the current adjustment gear number will be reduced or added by one; according to the adjustment after subtracting or adding one The number of gears and the current gear adjustment direction adjust the exposure parameters of the camera, and the solution in this embodiment can avoid an infinite loop.

According to the above camera parameter adjustment method of the present invention, the present invention also provides a camera parameter adjustment system, and the embodiments of the camera parameter adjustment system of the present invention will be described in detail below. FIG. 2 shows a schematic structural diagram of an embodiment of the camera parameter adjustment system of the present invention. For ease of description, only the parts related to the present invention are shown in FIG. 2 .

As shown in Figure 2, the camera parameter adjustment system of the embodiment of the present invention includes an acquisition module 201, a data statistics module 202, a calculation module 203, a judgment module 204, and an adjustment module 205, wherein:

The collection module 201 is used to control the camera to be adjusted to collect images under the current exposure parameters to obtain image data;

A statistics module 202, configured to perform pixel statistics on the currently obtained image data to obtain pixel distribution data;

Calculation module 203, configured to calculate the evaluation value of the currently collected image according to the currently obtained pixel distribution data and a preset evaluation function;

A judging module 204, configured to judge whether the currently calculated evaluation value satisfies a preset adjustment success condition,

The adjustment module 205 is used to select the corresponding adjustment gear number and the gear adjustment direction according to the currently calculated evaluation value when the determination result of the judgment module 204 is No, and adjust the gear position according to the currently selected adjustment gear number and gear adjustment direction. Directly adjust the exposure parameters of the camera, use the adjusted exposure parameters as the new current exposure parameters, and control the data acquisition module to perform the process of controlling the camera to be adjusted to collect images under the current exposure parameters to obtain image data. When the determination result of module 204 is yes, the adjustment of the camera parameters is ended.

In one of the embodiments, the evaluation function can be Among them, K ₁ , K ₂ , ..., K _n represent the preset saturation coefficient parameters of each pixel value interval, X ₁ , X ₂ , ..., X _n represent the number of pixel values in each pixel value interval, and N represents each pixel value The sum of the number of pixel values in the value interval;

The calculation module 203 can determine the number of pixel values and the sum value of each pixel value interval according to the currently obtained pixel distribution data, and calculate the currently collected pixel value number and the sum value according to the number of pixel values of each pixel value interval and the sum value The evaluation value of the image.

In one of the embodiments, the adjustment module 205 may determine the evaluation value interval corresponding to the evaluation value according to the currently calculated evaluation value, and adjust the number of gears and gears according to the determined evaluation value interval and the pre-stored evaluation value interval and The binding relationship of the adjustment direction selects the number of adjustment gears and the gear adjustment direction corresponding to the currently calculated evaluation value.

In one of the embodiments, as shown in Figure 3, the camera parameter adjustment system of the present invention further includes:

The binding module 206 is used to change the exposure parameters of the camera when the camera is in the current focal length and current focus state, and control the image data acquired by the camera to collect images when obtaining the exposure parameters, respectively according to the image data Calculate the evaluation value of each corresponding image with the evaluation function, and determine the corresponding relationship between the evaluation value and the camera gear according to the calculated evaluation value, and change the current focal length or the current focus state when the preset collection completion condition is not satisfied , using the changed current focal length or current focus state as the new current focal length or current focus state, return to execute changing the exposure parameters of the camera when the camera is in the current focal length and current focus state, and when the acquisition completion condition is satisfied , determine the binding relationship between the evaluation value interval, the number of adjustment gears, and the gear adjustment direction according to the corresponding relationship between the evaluation value determined each time and the camera gear position.

In one of the embodiments, the adjustment module 205 may set the current gear adjustment direction to the last gear adjustment direction when the current gear adjustment direction is the same as the last adjusted gear adjustment direction. The number of adjustment gears is subtracted or added by one, and the exposure parameters of the camera are adjusted according to the number of adjustment gears after subtracting or adding one and the current gear adjustment direction.

The camera parameter adjustment system of the present invention is in one-to-one correspondence with the camera parameter adjustment method of the present invention. The technical features and beneficial effects described in the above embodiments of the camera parameter adjustment method are applicable to the embodiments of the camera parameter adjustment system. It is hereby declared that .

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (8)

1. a kind of camera parameter method of adjustment, it is characterised in that comprise the following steps：

Control camera to be adjusted gathers image under current exposure parameter and obtains view data, and the picture number to currently obtaining Pixel distribution data are obtained according to pixels statisticses are carried out, wherein, pixel value distributed data refers to the corresponding pixel value of different pixel values Number situation；

The evaluation of estimate of the image currently gathered is calculated according to currently available pixel distribution data and default evaluation function, it is described Evaluation function isWherein, K₁、K₂、…、K_nRepresent the interval saturation of default each pixel value Figure parameters, X₁、X₂、…、X_nThe interval pixel value number of each pixel value is represented, N represents the interval pixel value number of each pixel value And value, Y represents the evaluation of estimate of evaluation function；

Judge whether the evaluation of estimate currently calculated meets default adjustment success conditions；

If it is not, corresponding adjustment gear number and gear adjustment direction are chosen according to the evaluation of estimate currently calculated, according to current The adjustment gear number and gear adjustment direction selected adjust the exposure parameter of the camera, using the exposure parameter after adjustment as New current exposure parameter, the return control camera to be adjusted gathers image under current exposure parameter and obtains view data Step, wherein, the step of choosing corresponding adjustment gear number and gear adjustment direction according to the evaluation of estimate currently calculated is wrapped Include following steps：Evaluation of estimate according to currently calculating determines that the corresponding evaluation of estimate of the evaluation of estimate is interval；Commented according to identified Value interval and the interval binding relationship with adjustment gear number, gear adjustment direction of the evaluation of estimate prestored choose current meter The corresponding adjustment gear number of evaluation of estimate and gear adjustment direction calculated；

If so, terminating the adjustment to the camera parameter.

2. camera parameter method of adjustment according to claim 1, it is characterised in that：

The evaluation of estimate that the image currently gathered is calculated according to currently available pixel distribution data and default evaluation function The step of comprise the following steps：

The interval pixel value number and described and value of each pixel value is determined according to currently available pixel distribution data；

The evaluation of estimate of the image currently gathered is calculated according to the interval pixel value number of each pixel value and described and value.

3. camera parameter method of adjustment according to claim 1, it is characterised in that institute's evaluation values are interval with adjusting gear Number, the binding relationship of gear adjustment direction are obtained in the following way：

Change each exposure parameter of the camera in the case where the camera is in current focus, current focusing state, obtain each exposure The view data that control camera collection image during parameter is obtained；

The evaluation of estimate of each corresponding image is calculated according to each view data and the evaluation function respectively, and obtained according to calculating Evaluation of estimate determines the corresponding relation of evaluation of estimate and camera gear；

When being unsatisfactory for default collection and finishing condition, change current focus or current focusing state, will be current after change Focal length or current focusing state return to described be in the camera and worked as new current focus or current focusing state The step of changing each exposure parameter of the camera under front focal length, current focusing state；

When meeting collection and finishing condition, evaluation of estimate area is determined according to the evaluation of estimate of each determination and the corresponding relation of camera gear Between with adjustment gear number, gear adjustment direction binding relationship.

4. camera parameter method of adjustment according to claim 1, it is characterised in that the adjustment shelves that the basis is currently selected The step of digit and gear adjustment direction adjust the exposure parameter of the camera includes step：

If the current adjustment gear number gear adjustment direction identical and current with the adjustment gear number of last adjustment and The gear adjustment direction of last time adjustment is on the contrary, then subtracting one by current adjustment gear number or Jia one；

The exposure parameter of camera is adjusted according to the adjustment gear number after subtracting one or Jia one and current gear adjustment direction.

5. a kind of camera parameter adjusts system, it is characterised in that including：

Acquisition module, view data is obtained for controlling camera to be adjusted to gather image under current exposure parameter；

Statistical module, pixel distribution data are obtained for carrying out pixels statisticses to the view data currently obtained, wherein, pixel value Distributed data refers to the number situation of the corresponding pixel value of different pixel values；

Computing module, for calculating the image currently gathered according to currently available pixel distribution data and default evaluation function Evaluation of estimate, the evaluation function isWherein, K₁、K₂、…、K_nRepresent default each picture The interval saturation coefficient parameter of element value, X₁、X₂、…、X_nThe interval pixel value number of each pixel value is represented, N represents each pixel value area Between pixel value number and value, Y represents the evaluation of estimate of evaluation function；

Whether judge module, the evaluation of estimate for judging currently to calculate meets default adjustment success conditions；

Adjusting module, for when the result of determination of the judge module is no, being determined according to the evaluation of estimate currently calculated should The corresponding evaluation of estimate of evaluation of estimate is interval, interval with adjusting shelves according to the evaluation of estimate that identified evaluation of estimate is interval and prestores Digit, the binding relationship of gear adjustment direction choose the corresponding adjustment gear number of the evaluation of estimate currently calculated and gear adjustment Direction, the exposure parameter of the camera is adjusted according to the adjustment gear number and gear adjustment direction currently selected, after adjustment Exposure parameter as new current exposure parameter, control the data acquisition module to carry out the control camera to be adjusted and working as The process that image obtains view data is gathered under prior exposure parameter, when the result of determination of the judge module is is, end pair The adjustment of the camera parameter.

6. camera parameter according to claim 5 adjusts system, it is characterised in that：

The computing module according to currently available pixel distribution data determine the interval pixel value number of each pixel value with And described and value, the image that is currently gathered according to the interval pixel value number of each pixel value and the calculating of described and value comments Value.

7. camera parameter according to claim 5 adjusts system, it is characterised in that also include：

Binding module, changes each exposure ginseng of the camera for being in the camera under current focus, current focusing state Number, the view data that control camera collection image when obtaining each exposure parameter is obtained, respectively according to each view data and The evaluation function calculates the evaluation of estimate of each corresponding image, and the evaluation of estimate obtained according to calculating determines evaluation of estimate and camera shelves The corresponding relation of position, when being unsatisfactory for default collection and finishing condition, changes current focus or current focusing state, will change Current focus or current focusing state afterwards is returned and performed in the phase as new current focus or current focusing state Machine, which is under current focus, current focusing state, changes each exposure parameter of the camera, when meeting collection and finishing condition, root Determine that evaluation of estimate is interval with adjusting gear number, gear adjustment direction according to the evaluation of estimate of each determination and the corresponding relation of camera gear Binding relationship.

8. camera parameter according to claim 5 adjusts system, it is characterised in that：

The adjusting module is adjusted in the current adjustment gear number gear identical and current with the upper adjustment gear number once adjusted Perfect square to it is opposite with the gear adjustment direction of last time adjustment when, current adjustment gear number is subtracted one or Jia one, according to subtracting One or the adjustment gear number after Jia one and current gear adjustment direction adjust the exposure parameter of camera.