Method for improving color reproduction effect from digital camera to displayer

A color reproduction and display technology, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve problems such as no practical application, and achieve the effect of low cost and simple method

Active Publication Date: 2015-07-08
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ICC has taken the CIECAM02 color appearance model into the color reproduction framework [11] , which is still under research and has not been applied in practice

Method used

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  • Method for improving color reproduction effect from digital camera to displayer
  • Method for improving color reproduction effect from digital camera to displayer
  • Method for improving color reproduction effect from digital camera to displayer

Examples

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Embodiment Construction

[0047] The equipment used in the examples is commercially available equipment. The specific steps of realization are the same as the description in the summary of the invention.

[0048] Implementation equipment SONY CPD-G52021 "CRT monitor and Canon PowerShot G2 digital camera. With 30 test samples (test sample color card: in CIELAB color space, L gets 50, a, b get -40, -15, 0, 15 respectively , 40, a total of 25 combinations, according to D65 light source, 2° observer data to convert it to RGB space, plus five grayscale color blocks (RGB values ​​are (50,50,50) (100,100,100) (150,150,150) (200,200,200)(255,255,255)) a total of 30 color patches. Use the printer to print out as a test color card.), the test samples in the D65 light box and the test samples taken by the camera are directly displayed on the monitor, and the average color difference between the two is 17.1 CIELAB color difference unit; processed by this method and then displayed on the display, the average color...

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Abstract

The invention provides a method for improving the color reproduction effect from a digital camera to a displayer, and belongs to the field of color science and technology. 24 color lumps of a Macbeth colorchecker color card which is placed in a D65 light box are used as test samples; the RGB value of the 24 color lumps is obtained by taking pictures of the 24 color lumps through the camera; the CIEXYZ value of the 24 color lumps is obtained by means of measurement through a PR715 spectrum scanning colorimeter; the R'G'B' of the displayer corresponding to the CIEXYZ value is calculated through a matrix A and a corresponding equation of the matrix A; the three-channel relation between the RGB of the camera and the R'G'B' of the displayer is built to obtain an R'G'B' image, reproduced on the displayer, of the RGB of any image taken through the camera. The average chromatic aberration obtained through objective evaluation is lowered from 17.1 CIELAB chromatic aberration units before the application of the method to 12.5 CIELAB chromatic aberration units after the application of the method; when subjective vision evaluation is utilized, the improvement rate of the reproduction effect of 30 test samples and 6 standard images adopting the method is increased by 85.6 % compared with the reproduction effect of using the displayer directly.

Description

Technical field: [0001] The invention relates to a method for improving the color reproduction effect from a digital camera to a display, and belongs to the field of color science and technology. Background technique: [0002] With the rapid development of computer and photoelectric technology, digital image equipment has been widely used in various environments such as industry, scientific research and life. Digital imaging equipment mainly includes digital imaging equipment (such as: digital cameras, color scanners, etc.) and color reproduction equipment (such as: monitors and color printers, etc.). Since the color rendering mechanism of various image devices is different, such as the RGB of the display is different from the RGB of the camera and the RGB of the printer, how to achieve accurate color transfer and color reproduction between various devices has become a research field in this field. Hotspots generally use a color management system to achieve color reproducti...

Claims

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Application Information

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IPC IPC(8): G09G5/02G09G3/00H04N9/64
Inventor 黄小乔石俊生陈载清
Owner YUNNAN NORMAL UNIV
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