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

An input device and color model technology, applied in the field of color management, can solve the problems of cumbersome steps, low precision of color conversion model, difficult implementation, etc., and achieve the effect of satisfying accuracy and speed

Inactive Publication Date: 2013-05-15
XIAN UNIV OF TECH
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  • Application Information

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.

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

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] The automatic establishment and conversion method of the color model of the computer input device of the present invention is specifically implemented according to the following steps:

[0019] Step 1: For the complete IT8.7 / 2 color target digital image collected by the computer input device, divide each small color block in the color block area, automatically obtain the RGB color value of each small color block, and establish the input device RGB and CIELAB lookup table.

[0020] Set the resolution of the scanner or digital camera to its maximum optical resolution, scan or shoot the IT8.7 / 2 color target in color mode, and perform grayscale processing on the collected and complete digital image of the color target, see figure 1 , including the color block area 1 of the IT8.7 / 2 color target and the gray scale block area 2 of the IT8.7 / ...

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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 ...

Claims

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Application Information

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IPC IPC(8): G06T7/40
Inventor 胡涛马冲聪范彩霞陈亚军
Owner XIAN UNIV OF TECH
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