WO2016129796A1 - Dispositif de création de table de couleurs, dispositif de contrôle/correction d'image de caméra, et procédé associé - Google Patents

Dispositif de création de table de couleurs, dispositif de contrôle/correction d'image de caméra, et procédé associé Download PDF

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Publication number
WO2016129796A1
WO2016129796A1 PCT/KR2015/013317 KR2015013317W WO2016129796A1 WO 2016129796 A1 WO2016129796 A1 WO 2016129796A1 KR 2015013317 W KR2015013317 W KR 2015013317W WO 2016129796 A1 WO2016129796 A1 WO 2016129796A1
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Prior art keywords
color
value
correction
illuminance
standard
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PCT/KR2015/013317
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English (en)
Korean (ko)
Inventor
이덕명
김성재
이봉영
정한별
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주식회사 넥서스칩스
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Priority to CN201580074372.1A priority Critical patent/CN107251554A/zh
Publication of WO2016129796A1 publication Critical patent/WO2016129796A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6016—Conversion to subtractive colour signals
    • H04N1/6019—Conversion to subtractive colour signals using look-up tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6075—Corrections to the hue
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6077—Colour balance, e.g. colour cast correction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/643—Hue control means, e.g. flesh tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters

Definitions

  • the present invention relates to a color table generating device, a camera image correction / control device, and a method thereof, and more particularly, to generate a color table based on color measurement values of a color / illuminance sensor and standard color values that distinguish colors by light sources.
  • the present invention relates to a color table generating apparatus, a camera image correction / control apparatus using a color table, and a method thereof.
  • the color / illuminance sensor is a sensor that measures the color and brightness of the ambient light source and can be converted to a standardized value using R.G.B.W (Red.Green.Blue.White) measurement values and calculation formulas.
  • the camera device may convert a captured image or image into a digital signal and store the converted digital signal, and display the image or image on a screen or paper as necessary.
  • the camera device may be mounted on the mobile communication terminal, and may have only a camera function independently.
  • the mobile communication terminal includes a personal digital assistant (PDA), a smart phone, an international mobile telecommunication 2000 (IMT-2000) terminal, a wideband code division multiple access (WCDMA) terminal, and a universal mobile telecommunication service (UMTS). It may be all information communication devices and multimedia devices such as terminals.
  • PDA personal digital assistant
  • IMT-2000 international mobile telecommunication 2000
  • WCDMA wideband code division multiple access
  • UMTS universal mobile telecommunication service
  • a camera apparatus may output frames of unprocessed image data by using a CMOS image sensor (CIS), a flasher (e.g., a flash), and an imaging unit, and an image signal processor (ISP).
  • CIS CMOS image sensor
  • flasher e.g., a flash
  • ISP image signal processor
  • a signal processor may be used to output frames of unprocessed image data as frames of processed image data.
  • the image signal processor of the camera device may perform a function of outputting frames of unprocessed image data referred to as an auto white balance (AWB) function to correct color temperature as frames of processed image data.
  • ABB auto white balance
  • This automatic white balance function is important to distinguish the color of the light source and to handle image correction according to the color of the light source.
  • the flasher included in the camera device is a device for improving image quality by generating a light source in a dark environment.
  • the scintillator can be brightened to a single color using a single light source color irrespective of the surrounding light source, or can be brightened to the same color as the ambient light source using two or more light source colors.
  • the conventional image correction technology for acquiring the processed image data using the image signal processor in the camera apparatus described above has a problem in that it is not possible to accurately distinguish various light sources in the surrounding environment, and thus the correction is not properly performed. Even when using more than two kinds of scintillators, it was difficult to accurately distinguish the color of the surrounding light source, which made it difficult to emit the correct light source color.
  • the present invention provides a color table generation device, a camera image correction / control device, and a method for correcting / controlling color of an image with reference to a color table corresponding to a color (RGB) measurement value obtained from a color / illuminance sensor.
  • RGB color
  • the present invention provides a color table generating device, a camera image correction / control device, and a method for adjusting the divergent color of a flasher to match the color of an ambient light source with reference to a color table.
  • An apparatus for generating a color table includes at least one dot and a color displayed on a three-dimensional space based on a color measurement value measured using a color / illuminance sensor and a standard color value that distinguishes colors for each light source. And an acquisition unit for acquiring the collection data of the collected data, and a generation unit configured to project the at least one dot and the color displayed on the three-dimensional space to the at least one dot and the color displayed on the two-dimensional plane to generate a color table.
  • the acquiring unit converts the color measurement value into a unit vector value, and converts the standard color value into an RGB value to obtain measurement data, and the unit vector and the RGB value included in the measurement data. It may include a second obtaining unit for rendering the normalized collection data.
  • the first acquirer may obtain the measurement data by converting the minimum and maximum values of the standard color values into the RGB values within a predetermined color threshold range.
  • the generation unit may generate the image table by interpolating peripheral pixels of the projected at least one dot and color.
  • the color table may include a correction value corresponding to a correction range of each color temperature and illuminance configured for each light source.
  • the color table may be referred to as a correction value for at least one of the color / exposure of the image sensed by the camera image sensor and the divergent color of the flasher.
  • Camera image correction / control device using a color table is a standard color value used to distinguish the color for each light source corresponding to the color measurement value, the color temperature / illuminance for the standard color value and the color temperature / Obtaining a color measurement value from a color table that stores and maintains color information including at least one of correction values corresponding to a correction range of illuminance, a color / illuminance sensor sensing a light source of an ambient environment, and the color / illuminance sensor; A color and an exposure of an image detected by a camera image sensor and an acquirer which acquires at least one of the standard colorimetric value, the color temperature / illuminance, and the correction value corresponding to the obtained color measurement value with reference to the color table And a correction control processor configured to correct and control at least one of the at least one of the at least one reference to the obtained correction value.
  • the obtaining unit obtains a color color value for the standard color value by referring to a chromaticity distribution table and calculates the color value for each component of the obtained color color value to obtain the correction value. can do.
  • the obtaining unit may obtain the correction value according to the color temperature / illuminance by calculating the color temperature / illuminance corresponding to the standard color value when the color table includes only the standard color value.
  • the correction control processor may correct and control the divergent color of the flasher with reference to the color temperature / illuminance.
  • the camera image correction / control device is based on a first correction mode of an automatic white balance correction value (AWB control value) or a manual white balance correction value (MWB control value) and the at least one control value.
  • the apparatus may further include a mode selector configured to select one of the second correction modes.
  • the method for generating a color table according to an embodiment of the present invention is based on at least one dot and color displayed on a three-dimensional space based on color measurement values measured using a color / illuminance sensor and standard color values that distinguish colors by light sources. Acquiring the collection data of the collected data and projecting the at least one dot and the color displayed on the three-dimensional space to the at least one dot and the color displayed on the two-dimensional plane to generate a color table.
  • Camera image correction / control method using a color table is a standard color value used to distinguish the color for each light source corresponding to the color measurement value, the color temperature / illuminance and the color temperature / Storing and maintaining color information including at least one of correction values corresponding to a correction range of illuminance in a color table, detecting a light source of an ambient environment through a color / illuminance sensor, and detecting the color from the color / illuminance sensor Acquiring a measurement value, acquiring at least one of the standard colorimetric value, the color temperature / illuminance, and the correction value corresponding to the obtained color measurement value with reference to the color table; and an image sensed through a camera image sensor Correcting and controlling at least one of a color and an exposure with reference to the obtained correction value The.
  • the present invention can correct / control the color of an image with reference to a color table corresponding to a color measurement value obtained from a color / illuminance sensor.
  • the present invention can adjust the divergence color of the scintillator to match the color of the ambient light source with reference to the color table.
  • FIG. 1 is a block diagram showing a color table generating apparatus according to an embodiment of the present invention.
  • FIG. 2 illustrates an example of a generation process for a color table.
  • 3A and 3B show examples of color tables corresponding to illuminance correction ranges.
  • FIG. 4 is a view for explaining the operation of the camera image correction / control apparatus according to an embodiment of the present invention.
  • FIG. 5 is a block diagram illustrating a camera image correction / control device according to an embodiment of the present invention.
  • FIG 7 illustrates an example of selecting one of the first correction mode and the second correction mode.
  • FIG. 8 is a flowchart illustrating a color table generation method according to an embodiment of the present invention.
  • FIG. 9 is a flowchart illustrating a camera image correction / control method according to an embodiment of the present invention.
  • FIG. 1 is a block diagram showing a color table generating apparatus according to an embodiment of the present invention.
  • the color table generating apparatus 100 includes an acquirer 110 and a generator 120.
  • the acquirer 110 acquires collection data for at least one dot and color displayed on a three-dimensional space based on a color measurement value measured using a color / illuminance sensor and a standard color value that distinguishes colors for each light source. .
  • the color / illuminance sensor can detect various ambient light sources (eg, light sources around the subject), can detect color measurements of various ambient light sources, and can be attached to one side of the camera device to attach the camera device. It can work in conjunction with.
  • Standard colorimetric values may be values of a color space defined by a standard, such as CIE xy as specified by the International Illumination Commission (CIE). At this time, the standard color value may be obtained through a chroma / illumination meter, and a chromaticity distribution table may be used to distinguish various light sources.
  • CIE International Illumination Commission
  • the acquirer 110 may include a first acquirer 111 and a second acquirer 112.
  • the first acquirer 111 may convert the color measurement value into a unit vector value and convert the standard color value into an RGB value to obtain measurement data.
  • expressing the standard color value as an RGB value is for easy interpolation, and may be converted to a value of various embodiments other than the RGB value in order to increase the precision.
  • the first obtaining unit 111 may obtain the measurement data by converting the color measurement value into a unit vector value through Equations (1) to (3).
  • S R , S G and S B are color measurements for red, green and blue
  • x vector , y vector and z vector are unit vector values for red, blue and green.
  • the first obtaining unit 111 may obtain the measurement data by converting the minimum and maximum values of the standard color values into RGB values within a predetermined color threshold range.
  • the first and second obtaining units 111 may set the minimum and maximum values of the standard color values (x CIE and y CIE ) to the RGB color values R within the selected color threshold range. , G, and B) to obtain measurement data, and to improve the accuracy of RGB values.
  • the standard color values x CIE and y CIE
  • the second acquirer 112 may obtain normalized collected data by rendering unit vector values and RGB values included in the measured data. In more detail, the second acquirer 112 may acquire collection data for at least one dot and color displayed on the three-dimensional space.
  • the generation unit 120 generates a color table by projecting at least one dot and color displayed on the three-dimensional space into at least one dot and color displayed on the two-dimensional plane.
  • a generation process for the color table will be described in detail with reference to FIG. 2.
  • FIG. 2 illustrates an example of a generation process for a color table.
  • the generation unit 120 renders the unit vector value and the RGB value and displays at least one collection data 210 of at least one point and color displayed on the normalized three-dimensional space on the two-dimensional plane.
  • the color table 220 may be generated by projecting one point and a color.
  • the generation unit 120 may generate the interpolated image table 230 by interpolating neighboring pixels with respect to the projected at least one dot and color.
  • the generation unit 120 may perform interpolation by connecting a point to a point, and may perform interpolation processing on neighboring pixels using a color filter.
  • the color table may include a correction value corresponding to a correction range of each color temperature and illuminance configured for each light source.
  • a color table may be used to generate a color / exposure and a flasher (eg, a color / exposure of an image detected by a camera image sensor). For example, it may be referred to as a correction value for at least one of the diverging colors of the flash sensor.
  • a correction value for at least one of the diverging colors of the flash sensor it may be referred to as a correction value for at least one of the diverging colors of the flash sensor.
  • FIG. 4 is a view for explaining the operation of the camera image correction / control apparatus according to an embodiment of the present invention.
  • the camera image correction / control apparatus 400 calculates a correction value used to correct an image generated by the camera apparatus 500, and provides the calculated correction value to the camera apparatus 500. .
  • the camera image correction / control apparatus 400 may acquire a correction value calculated based on the color measurement value and the color table obtained from the color / illuminance sensor 420.
  • the camera apparatus 500 may detect an image of a target subject by capturing a target subject based on an image sensor, and may include an automatic white balance correction value or a manual white balance correction value for correcting the detected image. Calculate the (MWB control value) and calculate the automatic exposure value (AE value).
  • the camera apparatus 500 may perform color correction on the image based on the calculated automatic white balance correction value or the manual white balance correction value, and the camera apparatus may control the image sensor with the calculated automatic exposure value.
  • the camera device 500 may use an ASB Auto smart value to which both white balance and auto exposure can be simultaneously applied.
  • the automatic white balance correction value may be a correction value for automatically calculating the white balance of the detected image
  • the manual white balance correction value may be a correction value for calculating the white balance according to a user's selection input.
  • the camera image correction / control device 400 may select one of an automatic white balance correction value or a manual white balance correction value provided by the camera device 200 to provide various image correction services to a user. It can provide a mode.
  • a camera image correction / control device using a color / illuminance sensor includes (1) an automatic white balance correction value or a manual white balance correction value, or (2) a color / illuminance sensor 420 of the present invention in consideration of an environment around a target subject. ) Can be provided to the user so that any one of the correction values calculated by the camera image correction / control device 400 can be selected.
  • the correction value using the color / illuminance sensor may be a correction value based on an automatic white balance correction value or a manual white balance correction value.
  • the camera image correction / control apparatus 400 uses a color table reflecting characteristics of various light sources of various surrounding environments without a separate calculation process and additional memory required for the calculation process, and obtains a color obtained from a color / illuminance sensor. Color or exposure of an image may be corrected / controlled by referring to a color table corresponding to the measured value.
  • the camera image correction / control apparatus 400 may refer to the color table, detect the ambient light source, and provide the scintillator device 550 with a control value for the divergent color of the scintillator.
  • Camera image correction / control device 400 may be implemented in the form of a chip (chip) to one side of the camera device 500 or a variety of terminals including the camera device 500, the camera The device 500 or the camera device 500 may be implemented in software inside various terminals, and may be provided in conjunction with the operation of the camera device 500 or various terminals to provide the above-described correction value and selection mode. .
  • the camera image correction / control device 400 using the color table will be described in detail with reference to FIG. 5.
  • FIG. 5 is a block diagram illustrating a camera image correction / control device according to an embodiment of the present invention.
  • the camera image correction / control device 400 includes a color table 410, a color / illuminance sensor 420, an acquirer 430, and a correction control processor 440.
  • the color table 410 may include at least one of a standard color value used to distinguish colors for each light source corresponding to a color measurement value, a color temperature / illuminance for the standard color value, and a correction value corresponding to the correction range of the color temperature / illuminance. Store and maintain color information, including.
  • the color / illuminance sensor 420 senses the light source of the surrounding environment.
  • the color / illuminance sensor 420 may measure a light source color by detecting a light source of an ambient environment.
  • the camera image correction / control device 400 may refer to at least one of a correction value corresponding to a correction range of color temperature / illuminance and color temperature / illuminance configured for each light source of various surrounding environments with reference to the color measurement values of the color / illuminance sensor. You can compute one.
  • the camera image correction / control device 400 may perform a separate calculation process on a correction value corresponding to a color temperature / illuminance and a correction range of the color temperature / illuminance and a color table reflecting characteristics of various light sources of various surrounding environments required for the calculation process. It is available.
  • the color table 410 may include at least one of a standard color value, color temperature / illuminance, and a correction value, as shown in FIGS. 1 to 3.
  • the acquirer 430 acquires a color measurement value from the color / illuminance sensor 420 and at least one of a standard color value, color temperature / illuminance, and correction value corresponding to the color measurement value obtained by referring to the color table 410. Acquire.
  • the acquirer 430 may obtain color measurement values S R_measured , S G_measured, and S B _measured from the color / illuminance sensor, and are measured using the above-described equations (1) to (3).
  • Unit vector values (x vector _measured , y vector _measured and z vector _measured ) may be obtained.
  • the acquirer 430 may obtain the RGB color value from the measured unit vector value by referring to the unit vector values (x vector , y vector and z vector ) included in the color table. By reference, a standard color value used to classify colors for each light source may be obtained.
  • the acquirer 430 may obtain a pre-calculated standard color value corresponding to the color measurement value.
  • a correction value with reference to the standard color value obtained with reference to FIG. 6 will be described in detail.
  • the acquirer 430 obtains a color color value 620 for the standard color values by referring to a chromaticity distribution table and obtains the color color values 620.
  • the correction value may be obtained by performing operation 630 for each component of the A).
  • the acquirer 430 may obtain the color color value 620 (L R , L G, and L B ) by mapping a standard color value to a chromaticity distribution table or using a calculation formula. Compensation values may be obtained by performing operations 630 (L R / L G and L B / L G ) for each component of.
  • the acquisition unit 430 is colored a color value (620) by a fixed L G (green) component represents the brightness of the light and, L R / L G and L B / L G calculated at L R ( Correction values for red) and L B (blue) can be obtained.
  • the acquirer 430 may calculate a color temperature / illuminance corresponding to the standard color values, and obtain a correction value according to the color temperature / illuminance.
  • the correction value according to the color color value and the correction value according to the color temperature / illuminance may be used to correct at least one of color and exposure of an image to be described later.
  • the acquirer 430 may acquire color information including at least one of a pre-calculated standard color value, color temperature / illuminance, and correction value corresponding to the color measurement value from the color table. .
  • the acquirer 430 may selectively provide at least one of a correction value calculated for each component of the color color value and a correction value according to the color temperature / illuminance with reference to the color table.
  • the correction value obtained by the operation 640 of the color temperature / illuminance corresponding to the standard color value may be used to correct the divergent color of the flasher 650.
  • the correction control processor 440 corrects and controls at least one of the color and the exposure of the image detected by the camera image sensor with reference to the obtained correction value.
  • the camera image correction / control device 400 may include a first correction mode based on an automatic white balance correction value (AWB control value) or a manual white balance correction value (MWB control value) and the at least one correction.
  • the apparatus may further include a mode selector 450 that selects one of the value-based second correction modes.
  • the mode selector 450 will be described in detail with reference to FIG. 7.
  • FIG 7 illustrates an example of selecting one of the first correction mode and the second correction mode.
  • the mode selector 450 may select one of an automatic white balance correction value based or a first correction mode based on a manual white balance correction value and a second correction mode based on the at least one correction value. .
  • the automatic white balance correction value may be a correction value for automatically calculating the white balance of the detected image
  • the manual white balance correction value may be a correction value for calculating the white balance according to a user's selection input.
  • the image 710 detected through the camera image sensor 510 may exhibit different spectral characteristics of the image sensor 510, and may be based on an automatic white balance correction value or manually.
  • the image 520 corrected using the white balance does not consider the inherent characteristics of the target subject and various spectroscopy around the target object, so that the color of the subject irrelevant to the inherent characteristics can be seen.
  • the image 530 corrected using the color table 410 of the present invention (using the second correction mode) reflects intrinsic characteristics of light sources of various surrounding environments such as color and light and dark.
  • the camera apparatus 500 may include an image sensor 510, an AWB / AE calculator 520, and a corrector 530.
  • the image sensor 510 may be used to detect an image or an image, and the AWB / AE calculator 520 may be used to calculate a white balance or automatic exposure of the magnetic domain, and the correction unit 530 may correct the detected image. Can be done.
  • the camera device 500 may be provided with a correction value calculated in conjunction with the camera image correction / control device 400 using the color / illuminance sensor 420 and the color table 410, and the user may correct the first correction.
  • a mode for selecting one of the mode and the second correction mode may be provided, and the detected image may be corrected according to the selection mode input.
  • the correction control processor 440 provides the calculated correction value to the image sensor 510 of the camera apparatus 500 in the case of exposure correction so that the correction is controlled.
  • the correction may be provided to the government 530 to control the correction.
  • the AWB / AE calculator 520 or the correction unit 530 may be configured as H / W, may be configured as S / W.
  • the correction control processor 440 may control the calculated control value to be provided to the image sensor 510 or the correction unit 530 of the camera apparatus 500. At least one of the color and the exposure of the image detected by the image sensor 510 may be corrected with reference to the calculated control value.
  • the camera device 500 may further include a flasher device, and the correction control processor 440 may correct the divergence color by using the light source color calculated by the flasher of the camera device 500.
  • FIG. 8 is a flowchart illustrating a color table generation method according to an embodiment of the present invention.
  • the color table generating apparatus displays at least one dot displayed on a three-dimensional space based on a color measurement value measured using a color / illuminance sensor and a standard color value that distinguishes colors for each light source. Acquire collected data about color and color.
  • the color / illuminance sensor can detect various ambient light sources (eg, light sources around the subject), can detect color measurements of various ambient light sources, and can be attached to one side of the camera device to attach the camera device. It can work in conjunction with.
  • the color table generating apparatus converts color measurement values into unit vector values, converts standard color values into RGB values, obtains measurement data, and renders unit vector values and RGB values included in the measurement data. Obtaining normalized collected data.
  • the color table generating apparatus generates a color table by projecting at least one dot and color displayed on the three-dimensional space to the at least one dot and color displayed on the two-dimensional plane.
  • the color table generating apparatus renders the unit vector value and the RGB value, and collects data about at least one point and color displayed on the normalized three-dimensional space on the two-dimensional plane. You can generate color tables by projecting with points and colors.
  • an interpolated image table may be generated by interpolating surrounding pixels of the projected at least one point and color, and more specifically, interpolation may be performed by connecting the points and the points. Filters can be used to interpolate surrounding pixels.
  • the color table may include a correction value corresponding to a correction range of each color temperature and illuminance configured for each light source.
  • the color table may be referred to as a correction value for at least one of the color / exposure of the image sensed by the image sensor and the divergent color of the flasher.
  • FIG. 9 is a flowchart illustrating a camera image correction / control method according to an embodiment of the present invention.
  • the camera image correction / control apparatus corrects color temperature / illuminance, color temperature / illumination, and color temperature / illuminance for a standard color value used to distinguish colors for each light source corresponding to a color measurement value.
  • Color information including at least one of the correction values corresponding to the range is stored and maintained in the color table.
  • the camera image correction / control device detects a light source of the surrounding environment through the color / illuminance sensor.
  • the color table may include at least one of standard colorimetric values, color temperature / illuminance and correction values.
  • the camera image correction / control apparatus acquires color measurement values from the color / illuminance sensor, and at least one of standard colorimetric values, color temperature / illuminance, and correction values corresponding to the color measurement values obtained by referring to the color table. Acquire.
  • the camera image correction / control device may obtain the color measurement values S R_measured , S G _measured, and S B _measured from the color / illuminance sensor in operation 930, and the above-described equations (1) to ( 3) it is possible to obtain a unit vector values (x _measured vector, y, and z vector _measured vector_measured) measured by.
  • the camera image correction / control apparatus may obtain the RGB value by referring to the measured unit vector value in reference to the unit vector values (x vector , y vector and z vector ) included in the color table.
  • a standard color value used to classify colors by light sources may be obtained by referring to RGB values.
  • the camera image correction / control apparatus may perform color information including at least one of a pre-calculated image correction value and a standard color value corresponding to the color measurement value when the color measurement value of the color / illuminance sensor exists. Can be obtained.
  • the camera image correction / control device obtains color color values for standard color values by referring to a CIE chromaticity distribution table and obtains the obtained color values. Compensation values may be obtained by calculating the components of the color values.
  • the camera image correction / control device in step 930, when the color table includes only standard color values, calculates the color temperature / illuminance corresponding to the standard color values and adjusts the correction values according to the color temperature / illuminance. Can be obtained.
  • the camera image correction / control device displays color information including at least one of a pre-calculated standard color value, color temperature / illuminance, and correction value corresponding to the color measurement value in step 930. Can be obtained from
  • the camera image correction / control apparatus may selectively provide at least one of a correction value calculated for each component of the color color value and a correction value according to the color temperature / illuminance with reference to the color table.
  • the camera image correction / control apparatus corrects and controls at least one of the color and the exposure of the image detected by the image sensor with reference to the obtained correction value.
  • the correction value may be a value for correcting at least one of the color and the exposure of the image detected by the camera image sensor, and may be a value for correcting the divergent color of the flasher.
  • the camera image correction / control device selects one of an automatic white balance correction value based or a first correction mode of a manual white balance correction value and a second correction mode based on the at least one control value. It may further comprise a step.
  • the method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium.
  • the computer readable medium may include program instructions, data files, data structures, etc. alone or in combination.
  • the program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks.
  • Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • the hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Color Television Image Signal Generators (AREA)
  • Image Processing (AREA)

Abstract

L'invention concerne un dispositif de création de table de couleurs, un dispositif de contrôle/correction d'image de caméra au moyen de la table de couleurs, et un procédé associé. Le dispositif de création de table de couleurs comprend : une unité d'acquisition pour acquérir des données de collecte sur au moins un point et une couleur affichés sur un espace tridimensionnel, sur la base d'une valeur de mesurage de couleur mesurée au moyen d'un capteur de couleur/d'éclairage et une valeur de couleur de table standard pour différencier des couleurs sur la base d'une source de lumière respective ; et une unité de création pour projeter le ou les points et couleurs affichés sur un espace tridimensionnel, dans au moins un point et une couleur affichés sur un plan bidimensionnel, de sorte à créer une table de couleurs.
PCT/KR2015/013317 2015-02-09 2015-12-07 Dispositif de création de table de couleurs, dispositif de contrôle/correction d'image de caméra, et procédé associé WO2016129796A1 (fr)

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CN201580074372.1A CN107251554A (zh) 2015-02-09 2015-12-07 色彩表生成装置、摄像机图像补正/控制装置及其方法

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