TW202044275A - Chromatic aberration correcting method for digital image capturing device and screen and the devices thereof - Google Patents

Abstract

The present invention provides a chromatic aberration correcting method for digital-image-capturing device and screen and the devices thereof, wherein the method comprises: providing a digital image capturing device and a display screen; providing a wavelength-tunable single-wavelength standard light source; performing standard image capturing; generating capturing-chromaticity-correcting parameters; completing digital-image-capturing device correction; inputting standard grayscale signal; performing uncorrected screen capturing; generating screen-chromaticity-correcting parameters; and completing screen correction. In addition, a standard image display device has a color characteristic configuration file built therein to record the system calibration parameters generated by the above method and a standard digital image capturing device includes the image chromaticity correction parameter generated by the above method. By the implementation of the present invention, the full-process chromatic aberration correction for the digital-image-capturing device and the screen can be quickly and efficiently performed.

Description

Digital image capturing device and chromatic aberration correction method and device of screen

The present invention relates to a digital image capturing device and a method for correcting chromatic aberration of a screen and its device, in particular to a digital image capturing device and a method for correcting the chromatic aberration of a screen used in dental restoration.

The oral cavity includes teeth, lips, tongue and other parts, which is the first stop for the human body to digest food; the main organs in the oral cavity include teeth, tongue, mucous membrane and salivary glands, among which the exposed part of the tooth is the crown, while the root of the tooth is not exposed section. Teeth can be divided into three parts from the inside out: enamel; dentin; and pulp.

When the dentist finds that the tooth is damaged and must be replaced, he must use the denture, or denture, to replace the damaged tooth. For the production of the denture, the dentist must first perform modeling and color matching, and then submit The dental laboratory includes: 1. Base production→ 2. Digital scanning→ 3. Digital design→ 4. Design completed→ 5. Digital precision machining→ 6. Zirconia post processing→ 7. High temperature sintering→ 8. Internal Crown adjustment → 9. Upper bonding agent → 10. Crown pile porcelain → 11. Porcelain furnace sintering → 12. Shape adjustment...etc.

When manufacturing dentures, because the color of dentures is related to the consistency or coordination with other teeth, it has a very critical impact on the overall aesthetics of the oral cavity. Therefore, how to make the dentures between the dentist and the dental laboratory Information about the color consistency of the dentures will depend on the imaging device and screen used by the dentist; however, if the imaging device and screen are not corrected for chromatic aberration, the tooth color information will be more inconsistent due to equipment errors .

The present invention is a digital imaging device and a method for correcting chromatic aberration of a screen and its device. It mainly solves the problem of chromatic aberration correction of the entire process from the digital imaging device to the screen and the completion of the chromatic aberration correction of the digital imaging device during the tooth restoration process. The problem occurs.

The present invention provides a digital imaging device and a method for correcting chromatic aberration of a screen, which includes: providing a digital imaging device to be corrected and a display screen to be corrected; providing a wavelength adjustable single-wavelength standard spectrum light source, which is divided according to a time sequence One single wavelength standard light source of each single wavelength is provided at the time; for standard imaging, the digital imaging device to be calibrated is used to capture the single wavelength standard light source according to the time sequence to produce each single-wavelength image of each pixel After the grayscale value is calculated, the corresponding chromaticity value of each single-wavelength image is calculated; the image chromaticity correction parameter is generated, which is the difference between the chromaticity value of each single-wavelength image and the corresponding single-wavelength standard spectrum Statistical calculation to generate each single-wavelength imaging chromaticity correction parameter; to complete the digital imaging device calibration, which is to calibrate the to-be-corrected digital imaging device with each single-wavelength imaging chromaticity correction parameter to generate a standard digital Image capture device; input standard grayscale signal, which is to input a R _(0-255) /G _(0-255) /B _(0-255) standard grayscale signal to the display screen to be calibrated to produce a display before calibration Screen; screen capture before calibration, which uses a standard digital imaging device to capture the display screen before calibration to generate a grayscale value of the screen before calibration, and then calculate the corresponding chromaticity value of the screen before calibration; Screen chromaticity correction parameters, which convert the standard grayscale signal to the chromaticity value of the screen before correction to generate a screen chromaticity correction parameter; and complete the screen correction, which will capture the chromaticity correction The parameters and the screen chromaticity calibration parameters are synthesized into the system calibration parameters and written into the color characteristic configuration file of the display screen to be calibrated.

The present invention also provides a chromatic aberration correction method for a digital image capturing device, which includes: providing a digital image capturing device to be corrected; providing a wavelength-tunable single-wavelength standard spectrum, which provides one single wavelength of each single wavelength according to a time sequence. Wavelength standard light source; for standard image capture, it uses a digital image capture device to be calibrated to capture the single-wavelength standard light source according to the time sequence to generate the grayscale value of each pixel of each single-wavelength image and then calculate the corresponding Capture chromaticity value of each single-wavelength image; generate image-capture chromaticity correction parameters, which are calculated by performing statistical calculation of the difference between the chromaticity value of each single-wavelength image and the standard spectrum of the corresponding single-wavelength standard light source to generate Each single-wavelength imaging chromaticity correction parameter; and the completion of the digital imaging device calibration, which is to calibrate the to-be-corrected digital imaging device with each single-wavelength imaging chromaticity correction parameter to generate a standard digital imaging device.

The present invention also provides a standard imaging screen device, which has a built-in color characteristic configuration file, and the color characteristic configuration file records the system calibration parameters according to the above-mentioned digital imaging device and the color difference calibration method of the screen.

The present invention also provides a standard digital imaging device, which is a digital imaging device to be calibrated, combined with an arithmetic module, and the arithmetic module records each single-wavelength imaging chromaticity correction parameter mentioned above. The arithmetic module is Execution: Perform dynamic image correction on each image taken according to the chromaticity correction parameters of each single-wavelength image taken.

Through the implementation of the present invention, at least the following advanced effects can be achieved: 1. It can effectively complete the full-process chromatic aberration correction from the digital imaging device to the screen. 2. It can effectively complete the chromatic aberration correction of the digital imaging device.

In order for anyone familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of patent application and the drawings, anyone familiar with the relevant art can easily understand the related purposes and advantages of the present invention Therefore, the detailed features and advantages of the present invention will be described in detail in the embodiments.

As shown in FIG. 1, this embodiment is a method S100 for chromatic aberration correction of a digital imaging device and a screen, which includes: providing a digital imaging device to be calibrated and a display screen S10 to be calibrated; providing a single wavelength standard with adjustable wavelength Spectrum S20; perform standard image capture S30; generate image capture chromaticity correction parameter S40; complete digital image capture device correction S50; input standard grayscale signal S60; screen capture S70 before calibration; generate screen chromaticity correction parameter S80; and Complete screen calibration S90.

As shown in FIG. 2, the above-mentioned digital imaging device and chromatic aberration correction method S100 of the screen includes a chromatic aberration correction method S200 of a digital imaging device, which includes: providing a digital imaging device to be corrected S12; providing a wavelength Adjust the single-wavelength standard spectrum S20; perform standard image capture S30; generate image capture chromaticity correction parameters S40; and complete digital image capture device calibration S50.

A digital imaging device to be calibrated and a display screen S10 to be calibrated are provided. The digital imaging device to be calibrated 111 and the display screen 115 to be calibrated are provided, and then the calibration procedure is completed for subsequent use. The digital imaging device can obtain the standard image information, and the display screen can complete the standard image. The digital imaging device 111 to be corrected may be a camera or a video camera.

When implementing the chromatic aberration correction method S200 of a digital image capturing device, at this time, providing a digital image capturing device S12 to be corrected only needs to provide a digital image capturing device 111 to be corrected.

As shown in Fig. 3, a single-wavelength tunable standard spectrum S20 is provided, which provides one single-wavelength standard light source 20 of each single wavelength according to a time sequence and time-sharing as the calibration standard; the wavelength of the single-wavelength standard light source 20 The range of (λ _n ) can be an integer value between 380 nm and 780 nm, and each single wavelength (λ _n ) has a set of standard gray scale values (W _R,Ln /W _G,Ln /W _B,Ln ); Wherein W is the gray scale; _R is red, _G is green, and _B is blue; _Ln is the wavelength, which can be, for example, a code for an integer value of wavelength from 380 to 780.

As shown in FIGS. 4A and 4B, the above-mentioned single-wavelength standard light source 20 may be provided by a light source 210 directly in a time-sharing manner under the control of the time-sharing output by the controller 220, or by a light source 210, such as LED A lamp, a xenon lamp, a high-pressure discharge lamp, a halogen lamp, a tungsten lamp, or a fluorescent lamp combined with a wavelength selector 230, such as provided by a grating or a beam.

Perform standard image capturing S30, which uses the digital image capturing device 111 to be calibrated to capture images of the single-wavelength standard light source 20 according to the above-mentioned sequence. At this time, each single-wavelength standard light source 20 will be generated. The grayscale value of each pixel of the single-wavelength picture is taken (P _{R,Ln (x,y)} /P _{G,Ln (x,y)} /P _{B,Ln (x,y)} ; where P(Pixel) is the pixel ; _R is red, _G is green, _B is blue; _Ln represents wavelength, which can be, for example, an integer value code of wavelength from 380 to 780; _(x,y) represents the pixel coordinates taken by the camera), and then, for the convenience of subsequent calculations , So take the grayscale value of each pixel of each single-wavelength picture (P _{R,Ln (x,y)} /P _{G,Ln (x,y)} /P _{B,Ln (x,y)} ) through color Chromaticity conversion calculation, and corresponding to the chromaticity value (C _{Ln (x,y)} ) of each pixel of each single-wavelength picture; where C represents the chromaticity value; _Ln represents the wavelength, which can be, for example, a wavelength of 380 to 780 Integer value code; _(x,y) represents the pixel coordinates of the camera.

In actual operation, the digital image capturing device 111 to be corrected will generate a frame 112 during the first image capture. Another frame 112 is composed of multiple pixels 113, such as 1024*768 frames. Each pixel can be composed of three sub-pixels (sub-pixel) 114, such as R/G/B three sub-pixels; therefore, each pixel of each single-wavelength picture mentioned above takes the grayscale Value (P _{R,Ln (x,y)} /P _{G,Ln (x,y)} /P _{B,Ln (x,y)} ), refers to the image taken of a single pixel in the picture generated by each single wavelength For the gray scale value, taking the screen with 1024*768 pixels as an example, 1024*768 image acquisition gray scale values can be generated.

Generate the image capturing chromaticity correction parameter S40, which is to perform the statistical calculation of the difference between the _captured chromaticity value (C _{Ln (x,y)} ) of each single-wavelength image and the corresponding single-wavelength standard spectrum after the image is captured to Generate chromaticity correction parameters for each single wavelength acquisition.

Specifically, the image capturing chromaticity correction parameter S40 is generated, which takes the image chromaticity value (C _{Ln (x, y)} ) of each pixel of each single-wavelength image after capturing and the single-wavelength standard corresponding to the single wavelength The standard chromaticity value (S _{R,Ln (x,y)} /S _{G,Ln (x,y)} /S _{B,Ln (x,y)} ) of the light source 20 is calculated by the difference statistics, and each single wavelength is generated The total chromatic aberration value is used as the chromaticity correction parameter for each single-wavelength imaging; where S represents the standard chromaticity value; _Ln represents the wavelength, which can be, for example, the code of the integer value of the wavelength from 380 to 780; _(x,y) represents the camera image Pixel coordinates.

More specifically, the above-mentioned step S50 of completing the calibration of the digital imaging device is to linearly superimpose the actual imaging spectrum of each imaging and its corresponding total chromatic aberration value of each single wavelength. The digital imaging device calibration S50 is completed dynamically.

As shown in FIG. 5A, under normal circumstances, the correction of the digital image capturing device 111 to be corrected is the image capturing chromaticity value (C _{Ln (x, y)} ) and the standard chromaticity value of the single wavelength standard light source 20 ( S _{R,Ln (x,y)} /S _{G,Ln (x,y)} /S _{B,Ln (x,y)} ) is calculated by an arithmetic module 50, such as a computer/electronic computer 510, to generate The calculation of the acquisition chromaticity correction parameter S40 and the correction using the acquisition chromaticity correction parameter is also completed in a computer 510; that is, the generation of the acquisition chromaticity correction parameter and subsequent correction are not completed in the camera.

As shown in FIG. 5B, in another case, the aforementioned arithmetic module 50 may be, for example, an embedded system 520 built in the digital image capturing device 111 to be corrected. In this case, the digital image capturing device 111 to be corrected Inside, the embedded system 520 generates the image capturing chromaticity correction parameter S40 and the subsequent dynamic digital image capturing device 111 to be corrected completes the real-time chromatic aberration correction.

After completing the step S200 of the chromatic aberration correction method for the digital imaging device, the display screen 115 to be corrected will be corrected next.

As shown in Figure 6, input the standard grayscale signal S60, which is to input a standard grayscale signal 610 with R _(0-255) /G _(0-255) /B _(0-255) to the display screen 115 to be corrected. At this time, the image generated on the display screen 115 to be corrected will be a display screen 116 before correction.

Screen capture before calibration S70, which uses a calibrated standard digital image capture device G111 to capture images of the pre-calibration display 116 to generate a pre-calibrated screen grayscale value (US _R(x,y) / US _{G (x,y)} / US _B(x,y) ); where US represents the screen grayscale before calibration; _R is red, _G is green, and _B is blue; _(x,y) represents the screen pixel coordinates; US _{R (x,y)} / US _G(x,y) / US _B(x,y) are between 0-255, and then the screen grayscale value before calibration (US _R (x,y) / US _G (x ,y) / US _B (x,y) ), after chromaticity conversion calculation to correspond to a screen chromaticity value before calibration.

Generate screen chromaticity correction parameter S80, which is the standard gray-scale signal, that is, the standard gray-scale signal with R _(0-255) /G _(0-255) /B _(0-255) input to the display screen 115 to be calibrated 610 performs chromaticity conversion, and then calculates it with the screen chromaticity value before correction generated by the standard digital image capturing device G111, so that a screen chromaticity correction parameter 810 can be generated.

The screen calibration S90 is completed, which combines the image capturing chromaticity correction parameter 410 and the screen chromaticity correction parameter 810 into the system correction parameter 910, and writes the color characteristic configuration file 115a of the display screen, for example, an ICC Profile.

A standard digital image capturing device G111, which is a digital image capturing device 111 to be calibrated with an arithmetic module 50, and the arithmetic module 50 records each of the above-mentioned single-wavelength image capturing chromaticity correction parameters; the arithmetic module can be Perform dynamic image correction for each real-time image capturing screen of the digital image capturing device 111 to be corrected according to each single-wavelength image capturing chromaticity correction parameter, thereby completing the chromatic aberration correction method S200 of the digital image capturing device described above .

A standard imaging screen device 300 has a built-in color characteristic configuration file, and the above-mentioned color characteristic configuration file records the system calibration parameters 910 generated according to the above-mentioned digital imaging device and screen color difference calibration method S100.

However, the above-mentioned embodiments are used to illustrate the characteristics of the present invention, and their purpose is to enable those familiar with the technology to understand the content of the present invention and implement them accordingly, rather than limiting the scope of the invention. The equivalent modification or modification completed by the spirit of the disclosure should still be included in the scope of patent application described below.

S100: Digital image capture device and screen color correction method S11: Provide a digital image capture device to be corrected and a display screen to be corrected S20: Provide a wavelength adjustable single wavelength standard spectrum S30: Perform standard capture S40: Generate capture Chromaticity correction parameter S50: complete digital imaging device calibration S60: input standard grayscale signal S70: screen capture before calibration S80: generate screen chromaticity correction parameter S90: complete screen calibration S200: chromatic aberration correction method for digital imaging device S12: Provide a digital imaging device to be corrected G111: Standard digital imaging device 111: Digital imaging device to be corrected 112: Screen 113: Pixel 114: Sub-pixel 115: Display screen to be calibrated 115a: Color characteristic configuration file 116: Display before calibration 20: Single-wavelength standard light source 210: Light source 220: Controller 230: Wavelength selector 300: Standard imaging screen device 410: Capture color correction parameter 50: Computing module 510: Computer 520: Embedded System 610: R _(0-255) /G _(0-255) /B _(0-255) Standard grayscale signal 810: Screen color correction parameter 910: System correction parameter

[Fig. 1] is an embodiment of a flow chart of a digital imaging device and a method for correcting chromatic aberration of a screen of the present invention; [Fig. 2] is an embodiment of a flow chart of a method for correcting chromatic aberration of a digital imaging device of the present invention; [Figure 3] is an embodiment diagram of a wavelength-tunable single-wavelength standard spectrum of the present invention and the light shape of the single-wavelength standard light source provided by time-sharing; [Fig. 4A] is an embodiment diagram of a single-wavelength standard light source formed by a light source combined with a controller of the present invention; [FIG. 4B] is an embodiment diagram of a light source combined with a wavelength selector to form a single-wavelength standard light source of the present invention; [Figure 5A] is an embodiment diagram of a digital image capturing device to be corrected combined with a computer according to the present invention; [Figure 5B] is an embodiment diagram of a digital image capturing device to be corrected combined with an embedded system of the present invention; [Fig. 6] is a diagram of an embodiment of the system architecture for calibrating the display screen to be calibrated according to the present invention; [FIG. 7A] is the first diagram of a standard digital imaging device architecture embodiment of the present invention; [FIG. 7B] is the second embodiment of the architecture of a standard digital imaging device of the present invention; and [FIG. 8] is a diagram of an embodiment of the structure of a standard display screen device of the present invention.

S100: Chromatic aberration correction method for digital imaging device and screen

S11: Provide a digital imaging device to be calibrated and a display screen to be calibrated

S20: Provide a wavelength tunable single wavelength standard spectrum light source

S30: Perform standard acquisition

S40: Generate image chromaticity correction parameters

S50: Complete the calibration of the digital imaging device

S60: Input standard grayscale signal

S70: Screen capture before calibration

S80: Generate screen color correction parameters

S90: Complete screen calibration

Claims (15)

A digital imaging device and a method for chromatic aberration correction of a screen, comprising: providing a digital imaging device to be calibrated and a display screen to be calibrated; providing a wavelength-tunable single-wavelength standard spectrum light source, which provides a time-sharing One of the single-wavelength standard light sources of each single wavelength of the standard spectrum; for standard imaging, the digital imaging device to be corrected is used to capture the single-wavelength standard light source according to the timing sequence to generate each single-wavelength image. After taking the grayscale value of the pixel, it calculates the corresponding chromaticity value of each single-wavelength image; generates the chromaticity correction parameter of the image, which is the chromaticity value of each single-wavelength image corresponding to the single wavelength Perform difference statistical calculations on the standard spectrum to generate each single-wavelength imaging chromaticity correction parameter; complete the calibration of the digital imaging device, which uses each single-wavelength imaging chromaticity correction parameter to acquire the digital image to be corrected The device is calibrated to generate a standard digital image capturing device; input the standard gray-scale signal, which is to input a R _(0-255) /G _(0-255) /B _(0-255) standard gray-scale signal into the waiting After calibrating the display screen to generate a pre-calibration display; performing a pre-calibration screen capture, which uses the standard digital imaging device to capture the pre-calibration display screen to generate a pre-calibrated screen grayscale value, and then The calculation corresponds to a screen chromaticity value before calibration; a screen chromaticity correction parameter is generated, which is calculated after chromaticity conversion of the standard grayscale signal and the screen chromaticity value before correction to generate a screen chromaticity correction parameter And to complete the screen calibration, which is to synthesize the chromaticity correction parameter of the image acquisition and the chromaticity correction parameter of the screen into the system correction parameter, and write the color characteristic configuration file of the display screen to be calibrated. For example, the chromatic aberration correction method described in item 1 of the scope of patent application, wherein the single-wavelength standard light source is directly provided by a light source under the control of the time-sharing output, or provided by an LED lamp, a xenon lamp, and a High-pressure discharge lamp, a halogen lamp, a tungsten lamp, or a fluorescent lamp combined with a wavelength-selectable grating or 稜鏡 provided. The chromatic aberration correction method described in item 1 of the scope of patent application, wherein the wavelength range of the single-wavelength standard light source is an integer value between 380 nm and 780 nm. According to the chromatic aberration correction method described in item 1 of the scope of patent application, the digital imaging device is a camera or a video camera. For the chromatic aberration correction method described in item 1 of the scope of patent application, the chromaticity correction parameter for each single-wavelength image taken is the chromaticity value of each single-wavelength image taken with the single-wavelength standard corresponding to the single wavelength The standard chromaticity value of the light source is subjected to statistical calculation of the difference, and the total color difference value of each single wavelength is generated. The chromatic aberration correction method described in item 5 of the scope of patent application, wherein the completion of the digital imaging device calibration step is to linearly superimpose each actual imaging spectrum and the corresponding total chromatic aberration value of each single wavelength . A method for chromatic aberration correction of a digital imaging device, which includes: Provide a digital imaging device to be corrected; Provide a wavelength tunable single-wavelength standard spectrum light source, which provides one single-wavelength standard light source of each single wavelength of a standard spectrum in a time-sharing time-sharing manner; For standard image capture, the single-wavelength standard light source is imaged by the digital image capture device to be corrected according to the timing sequence to generate the grayscale value of each pixel image of each single-wavelength image. The chromaticity value of a single-wavelength image taken; Generate the chromaticity correction parameter for the image capturing, which is to perform statistical calculation of the difference between the chromaticity value of each single-wavelength image captured and the standard spectrum corresponding to the single wavelength to generate each single-wavelength image chromaticity correction parameter; and The calibration of the digital image capturing device is completed, and the digital image capturing device to be corrected is calibrated with each single-wavelength image capturing chromaticity correction parameter to generate a standard digital image capturing device. For example, the chromatic aberration correction method described in item 7 of the scope of patent application, wherein the single-wavelength standard light source is directly provided by a light source under the control of the time-sharing output, or by an LED lamp, a xenon lamp, and a High-pressure discharge lamp, a halogen lamp, a tungsten lamp, or a fluorescent lamp combined with a wavelength-selectable grating or 稜鏡 provided. . The chromatic aberration correction method described in item 7 of the scope of patent application, wherein the wavelength range of the single-wavelength standard light source is an integer value between 380 nm and 780 nm. In the chromatic aberration correction method described in item 7 of the scope of patent application, the digital imaging device is a camera or a video camera. For the chromatic aberration correction method described in item 7 of the scope of patent application, the chromaticity correction parameter for each single-wavelength image taken is the chromaticity value of each single-wavelength image taken with the single-wavelength standard corresponding to the single wavelength The standard chromaticity value of the light source is subjected to statistical calculation of the difference, and the total chromatic difference value of each single wavelength is generated. The chromatic aberration correction method described in item 11 of the scope of patent application, wherein the completion of the calibration step of the digital image capturing device is to perform linearity between the spectrum of each actual image captured and the corresponding total chromatic aberration value of each single wavelength Overlay. A standard display screen device, which has a built-in color characteristic configuration file, and the color characteristic configuration file records the system calibration parameters according to claim 1. A standard digital imaging device, which is a digital imaging device to be calibrated combined with an arithmetic module, and the arithmetic module records the chromaticity correction parameters for each single-wavelength imaging as described in claim 1 or 7 , The calculation module executes: Perform dynamic image correction on each image capturing frame according to the chromaticity correction parameter of each single wavelength image capturing. For example, the standard digital imaging device described in item 14 of the scope of patent application, wherein the computing module is an embedded system built in the digital imaging device to be corrected.

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