Automatic establishing and converting method for color models of computer input device

Abstract

The invention discloses an automatic establishing and converting method for color models of a computer input device. The steps of the automatic establishing and converting method includes dividing all small color lumps in color lump areas in a complete IT8.7 / 2 color target digital image collected by the computer input device, automatically obtaining red, green and blue (RGB) color values of all the small color lumps, forming an RGB and CIELAB lookup table of the computer input device, dividing device RGB color gamut spaces formed by maximum values and minimum values of the red, the green and the blue colors in the RGB and CIELAB lookup table of the computer input device, establishing RGB sub spaces and color models of the RGB sub spaces from RGB to CIELAB, judging the RGB sub spaces where the pixels of the digital image collected by the computer input device are located, and converting RGB values of the pixels to corresponding CIELAB component values of according to the color models of the RGB sub spaces. According to the automatic establishing and converting method for the color models, the steps are simple, and the accuracy is improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of color management, and in particular relates to a method for automatically establishing and converting a color model of a computer input device. Background technique [0002] Commonly used computer input devices include scanners, digital cameras, etc., and the color spaces used by them are all RGB color spaces. The CIELAB color space is a device-independent and perceptually uniform color space defined by the International Commission on Illumination. [0003] Color management is to convert the color from the color space RGB of the computer input device to the device-independent color space, and then convert from the device-independent color space to the color space of the display device or output device, so as to achieve color distortion when transmitting from the input device to the output device minimal purpose. The commonly used device-independent color space is the CIELAB color space, and the commonly ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a color model automatic establishment and conversion method of a computer input device, which solves the problem of manually obtaining the RGB sample point data of the IT8. Table lookup in the rule space, the steps are cumbersome and difficult to implement, and the problem of using a set of polynomial equations to establish the color conversion model of the computer input device is not high in accuracy

Images