A Study On The Color Management System Of Computer Input And Output Devices

Color management is an important way to realize high quality reproduction of multicolor among different devices. Accurately communicating and reproducing color information among different devices has always being the color management's target and an important subject for research.Input is the first working procedure of color delivery, lead the color delivery; Output is the final color working procedure, and playing decisive role in color delivery. Therefore, to be ready for color management, finishing the color management of input and output equipment is very important. So, characteristic property researching is the most essential working in color management system of the scanner and the printer equipment.The subject research the color conversion model of input and output devices color space with device-independent color space based on analyzing color characteristic property of scanner and printer, and adopting 20 polynomial regression to build the scanner positive and reversal conversion model and the printer on the contrary conversion model, building color gamut mapping of input and output devices according color space with device-independent CIELab color space which is the intermediary agent space. On the basis of realizing the transform of CIELab->CMY, the subject adopts GCR and UCR to ascertain K value, achieve the transformation of CIELab-> CMY-> CMYK. After analyzing TIFF image format of CMYK pattern, it can be used to realize the saving of image which is the result of color space conversion to print directly. The subject analysis and research the basic function of printer driver provided by MFC for user. The subject research the problem of dot gain of printer which is existed during the process of image's printing because of many complicated factors, and building the compensation relationship between passage of C, M, Y, K, fairly good realize the compensation of dot expanding.Research result of this subject laid down rationale for further studying in color management, accumulated rich practical experience. The software can process quickly, reproduce amanuscript truly, have a certain application value in color management system research of input and output devices.