Why print the picture will appear color error?
Color printers and scanners and their functional characteristics will be related to a color accuracy of the problem, this problem often determines the quality of their image generation, product performance level, the size of the error ratio and other important indicators. Color accuracy refers to the proximity of the printer output or the color of the scanner input to the standard color.

We know that in the display, scanners, printers and other products, the use of RGB, CMY, HSB these commonly used color description and implementation methods, and thus achieve accurate output, the purpose of input color. Among them, RGB refers to the use of red R, green G, blue B combination of three colors to issue different colors of light, monitors, projectors and other equipment, the principle of light and computer data storage principle is based on this color description method (In the computer, the color of each point on the image generally need to use a 24-bit RGB information stored, of which 8 for red, 8 for green, 8 for blue).

CMY refers to the use of cyan C, red M and yellow Y combination of these three basic colors of color, people in order to enhance the effect of its pigment absorption, often coupled with black K (blacK) pigments, which The formation of the current popular cf400x, so the color printer is usually based on the four colors of the cartridge-based (some portable printers, due to volume constraints, will also use CMY three colors; six or more color printer is increased Light red, light blue and other colors to make the color of printing more natural and improve the printing effect), it is also a color rendering method used in inkjet printers, prints and everyday use of pigment painting.

It can be seen from the light of the three primary colors and physical reflection of the different color principle, will make the use of the computer to achieve the color of the method, and the computer will be the color output to the realization of the method will be different. In addition, the colors (Hue), Saturation (Saturation) and brightness (Brightness) also play an important role in the performance of color, for example, the depth of each color, bright, glossy is determined by the HSB. Because the computer uses the RGB mode to display the page must be CMY mode (or CMYK mode) to print, which requires the color from RGB mode to CMY mode, and is responsible for the output color of the color printer, in this color conversion work, Its output color and CMYK mode standard color close to how, you can analyze the color accuracy .