Method, apparatus, and device for processing image, and storage medium

An apparatus for processing an image, applied in a terminal device and comprising:

• a processor;
• and
• a memory configured to store one or more instructions executable by the processor;
• wherein the processor, when loading and executing the one or more instructions, is caused to perform:
• determining, based on an average gray-scale value of n adjacent pixel points in a first image to be processed, a target pixel sample group from a plurality of pixel sample groups, wherein each of the plurality of pixel sample groups comprises at least one pixel sample, each pixel sample comprises n sample pixel points, average gray-scale values of pixel samples in different pixel sample groups are different, and average gray-scale values of pixel samples in one pixel sample group are the same;
• determining, based on a gray-scale value of each of the n pixel points, a target pixel sample from at least one pixel sample in the target pixel sample group, wherein a gray-scale trend of n sample pixel points in the target pixel sample is the same as a gray-scale trend of the n pixel points;
• determining, based on the target pixel sample and initial pixel values of the n pixel points, target pixel values of the n pixel points from pixel values corresponding to a plurality of alternative colors;
• and
• obtaining a second image by converting the initial pixel values of the n pixel points in the first image into corresponding target pixel values, wherein the second image presents a gradual change effect visually,
• wherein said determining, based on the average gray-scale value of the n adjacent pixel points in the first image to be processed, the target pixel sample group from the plurality of pixel sample groups comprises:
• determining, from a plurality of average gray-scale ranges, a target average gray-scale range where the average gray-scale value of the n pixel points is located, wherein the plurality of average gray-scale ranges are composed of average gray-scale values corresponding to the plurality of pixel sample groups;
• and determining a pixel sample group corresponding to a lower limit of the target average gray-scale range as the target pixel sample group;
• the plurality of alternative colors comprise a first alternative color having no hue, a second alternative color having no hue, and a third alternative color having a hue;
• and
• said determining, based on the target pixel sample and the initial pixel values of the n pixel points, the target pixel values of the n pixel points from pixel values corresponding to the plurality of alternative colors comprises:
• determining, for any one of the n pixel points, whether an initial pixel value of the pixel point meets a pixel condition of the third alternative color;
• determining, in a case that the initial pixel value of the pixel point meets the pixel condition of the third alternative color, a pixel value corresponding to the third alternative color as a target pixel value of the pixel point;
• and determining, in a case that the initial pixel value of the pixel point does not meet the pixel condition of the third alternative color, a pixel value of a sample pixel point at a corresponding position of the pixel point in the target pixel sample as the target pixel value of the pixel point.

A device for processing an image, applied in a terminal device and comprising a memory and a processor, wherein the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory to perform:

• determining, based on an average gray-scale value of n adjacent pixel points in a first image to be processed, a target pixel sample group from a plurality of pixel sample groups, wherein each of the plurality of pixel sample groups comprises at least one pixel sample, each pixel sample comprises n sample pixel points, average gray-scale values of pixel samples in different pixel sample groups are different, and average gray-scale values of pixel samples in one pixel sample group are the same;
• determining, based on a gray-scale value of each of the n pixel points, a target pixel sample from at least one pixel sample in the target pixel sample group, wherein a gray-scale trend of n sample pixel points in the target pixel sample is the same as a gray-scale trend of the n pixel points;
• determining, based on the target pixel sample and initial pixel values of the n pixel points, target pixel values of the n pixel points from pixel values corresponding to a plurality of alternative colors;
• and
• obtaining a second image by converting the initial pixel values of the n pixel points in the first image into corresponding target pixel values, wherein the second image presents a gradual change effect visually,
• wherein said determining, based on the average gray-scale value of the n adjacent pixel points in the first image to be processed, the target pixel sample group from the plurality of pixel sample groups comprises:
• determining, from a plurality of average gray-scale ranges, a target average gray-scale range where the average gray-scale value of the n pixel points is located, wherein the plurality of average gray-scale ranges are composed of average gray-scale values corresponding to the plurality of pixel sample groups;
• and determining a pixel sample group corresponding to a lower limit of the target average gray-scale range as the target pixel sample group;
• the plurality of alternative colors comprise a first alternative color having no hue, a second alternative color having no hue, and a third alternative color having a hue;
• and
• said determining, based on the target pixel sample and the initial pixel values of the n pixel points, the target pixel values of the n pixel points from pixel values corresponding to the plurality of alternative colors comprises:
• determining, for any one of the n pixel points, whether an initial pixel value of the pixel point meets a pixel condition of the third alternative color;
• determining, in a case that the initial pixel value of the pixel point meets the pixel condition of the third alternative color, a pixel value corresponding to the third alternative color as a target pixel value of the pixel point;
• and determining, in a case that the initial pixel value of the pixel point does not meet the pixel condition of the third alternative color, a pixel value of a sample pixel point at a corresponding position of the pixel point in the target pixel sample as the target pixel value of the pixel point.