Image processing method and device

Abstract

The invention discloses an image processing method and device and belongs to the technical field of display. The method comprises the steps of obtaining pixel data of a to-be-processed image; obtaining a histogram of the image according to the pixel data, wherein the histogram is used for indicating the pixel number of the image under each gray scale; forming a target gray scale set according to the gray scales of which pixel number exceeds the preset pixel number in the histogram; selecting target pixels of which gray scales belong to the target gray scale set from the image; and carrying out color reverse operation on the target pixels. According to the method and the device, the feature that the pixel number of the background pixels and character pixels is relatively high in the image is taken into full consideration, so the background pixels and character pixels are extracted from the pixel number under each gray scale in the histogram; the color reverse operation is carried out on the background pixels and character pixels; the gray scales of the image can be reduced; the contrast of the image is kept unchanged; and the definition of the image is prevented from being influenced by reduction of the gray scales.

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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