Research Based On WCS Device Model Profile And Color Space Conversion

The ICC color management mode cannot adapt to the color reproduction with changing visual condition.It cannot met the requirements for cross-media color reproduction either.WCS(Window Color System)uses a color appearance model as a connection space to achieve color appearance matching and adapt to cross-media color reproduction well.However,there is not mature WCS color management software currently,and the technical research on each module of WCS color management is not mature enough.This paper focuses on the research of image output color management of CMYK printer based on WCS.First,the structure and content of the printer's feature file are studied,and the file name,author,measurement condition,device type,color space type,color target data,etc.needed to be recorded were used and the Java Swing component was used to generate the printer feature file.The DOM method parses the printer properties file and obtains printer property file information.Then,four commonly used color space conversion algorithms are studied,and multidimensional lookup tables are used to realize the color space Forward and reverse conversion of CMYK and CIEXYZ.In order to improve the color space conversion accuracy of multidimensional lookup tables,this paper proposes an improved method for CMYK color space segmentation.CMYK color space is segmented using the color difference analysis method according to the K value equal to 0,20,40,60,80,100,and the segmented grid points are made into a color target and the colorimetric values thereof are measured to realize the color space conversion.As a result,the average color difference in the color space conversion of the color target is 1.36 using the new segmentation method,and 2.65 in the color target conversion using the ECI2002 standard colorimetric method.The color difference analysis sampling method can effectively improve the conversion accuracy.Finally,the WCS color management module from the display device to the printer is implemented using the matlab GUI.Its functions include file management,image mode conversion,acquisition of single-point color values,and single-channel image display.The results show that the image output is better.