Image processing method and device

Abstract

The present disclosure relates to an image processing method and device, and belongs to the field of display technology. The method includes: obtaining pixel data of an image to be processed; obtaining a histogram of the image according to the pixel data, and the histogram is used to indicate the number of pixels of the image in each gray scale; Grayscales whose number of pixels in the histogram exceeds the number of preset pixels form a target grayscale set; from the image, select a target pixel whose grayscale belongs to the target grayscale set; and perform an inverse operation on the target pixel. This disclosure fully considers the feature that the number of background pixels and text pixels in the image is relatively large, so that the background pixels and text pixels are extracted according to the number of pixels in each gray scale in the histogram, and the background pixels and text pixels are reversed. Color operation can reduce the gray scale of the image, and ensure that the contrast of the image remains unchanged, avoiding the impact of lowering the gray scale on the image clarity.

Description

technical field [0001] The present disclosure relates to the field of display technology, in particular to an image processing method and device. Background technique [0002] With the development of display technology, images are displayed in more and more diverse ways, and the brightness of the displayed image can also change. Any image is composed of pixels. The gray scale of a pixel refers to the brightness level of a pixel. Terminal equipment Pixels in an image can be displayed in a certain gray scale, thereby controlling the brightness of the image. [0003] However, when the environment becomes dark, the image displayed by the terminal device tends to be rather dazzling. At this time, in order to protect the user's eyes, it is necessary to reduce the gray scale of the pixels in the image, thereby reducing the brightness of the image. [0004] However, the contrast of the image is determined by the difference between the gray levels of different pixels. When the termi...

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Problems solved by technology

[0003] However, when the environment becomes dark, the images displayed by the terminal equipment tend to be more dazzling. At this time, in order to protect the eyes of the user, it is necessary to reduce the gray scale of the pixels in the image, thereby reducing the brightness of the image

[0004] However, the contrast of the image is determined by the difference between the gray levels of different pixels. When the terminal device reduces the gray level of the pixels in the image, the difference between the gray levels of different pixels decreases, resulting in a decrease in image contrast and affecting the clarity of the image.

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