Electronic ink screen graying method

Abstract

The invention discloses an electronic ink screen graying method, which comprises the steps of acquiring information of a color image; adding a black mask layer to the current color image; clipping an overlap area of a bitmap and the black mask layer; and displaying the black mask layer at the upper layer by the overlap area so as to complete gray processing. The principle is that color filtering standards with the same reference are provided for all color pixels through the black mask layer with a filter effect, so that color filtering effects of each pixel can be consistent, different colors can correspond to the corresponding gray scale and are not in disorder. An effect of clearness is acquired in image display, and random gray scale does not occur in similar color codes. Through the method disclosed by the invention, the application range of equipment provided with an electronic ink screen can be effectively expanded.

Description

technical field [0001] The invention relates to a processing method for bitmap grayscale, in particular to a grayscale method for displaying color pictures on an electronic ink screen. Background technique [0002] E-readers usually use electronic ink screens. Compared with ordinary LCD screens, electronic ink screens have the advantages of low power consumption, flexibility and easy to read, eye protection, and better display effects under sunlight. However, electronic ink screens can only display grayscale images, and the number of colors is far inferior to that of LCD screens. Therefore, the grayscale processing directly affects the display effect of the electronic ink screen. At present, most APPs of IT products are developed for color LCD screens. When these APPs are installed on devices such as electronic readers that use electronic ink screens, their color pictures will be grayscaled by the electronic ink screen. Show again. At present, most of the grayscale proces...

AI Technical Summary

Problems solved by technology

At present, most of the grayscale processing methods of electronic ink screens refer to unifying the RGB three colors of color pixels into one same value. For example, the color of a certain pixel is RGB(03,52,73), where 03 is the red value, 52 is the green value, and 73 is the blue value. After grayscale processing, use any value in RGB to assign a value, such as: unify the pixel to RGB (73,73,73), and then display it. less effective

For different colors, when there is a certain value in the RGB value that is the same, it may be displayed as the same gray level, resulting in color confusion, especially for adjacent parts, it may lead to missing borders, unable to display patterns correctly, and severe distortion. The effect of the display