Image processing method and apparatus, and storage medium

An image processing apparatus, comprising:

• a processor, and a memory configured for storing instructions executable by the processor, wherein the processor is configured to:
• acquire pixel data of an image to be processed, the pixel data comprising position information and a grey scale of each pixel;
• acquire a histogram of the image according to the pixel data, the histogram indicating a pixel number under each grey scale;
• obtain a target grey scale set by using in the histogram a grey scale whose pixel number exceeds a preset pixel number;
• select, from the image, a target pixel whose grey scale belongs to the target grey scale set;
• and
• perform a color inversion operation to the target pixel, comprising
• determining a grey scale of each sub-pixel in the target pixel;
• and
• for each sub-pixel in the target pixel, calculating a difference between a preset maximum grey scale and the grey scale of each sub-pixel, and taking the difference as the grey scale of the sub-pixel after the color inversion so as to invert a color of the target pixel.

A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a mobile terminal, causes the mobile terminal to perform an image processing method, the method comprising:

• acquiring pixel data of an image to be processed, the pixel data comprising position information and a grey scale of each pixel:
• acquiring a histogram of the image according to the pixel data, the histogram indicating a pixel number under each grey scale;
• obtaining a target grey scale set by using in the histogram a grey scale whose pixel number exceeds a preset pixel number;
• selecting, from the image, a target pixel whose grey scale belongs to the target grey scale set;
• and
• performing a color inversion operation to the target pixel, comprising:
• determining a grey scale of each sub-pixel in the target pixel;
• and
• for each sub-pixel in the target pixel, calculating a difference between a preset maximum grey scale and the grey scale of each sub-pixel, and taking the difference as the grey scale of the sub-pixel after the color inversion so as to invert a color of the target pixel.