Image generation method, computing device, and storage medium

A computing device comprising:

• at least one processor;
• and
• a storage device storing computer-readable instructions, which when executed by the at least one processor, cause the at least one processor to:
• obtain an original image with flawless characters, determine a character area comprising the flawless characters and a background area of the original image, and determine a position of each flawless character in the character area;
• segment the character area according to the position of the flawless character in the character area to obtain a first image of the flawless character;
• remove a background from the first image to obtain a second image of the flawless character;
• perform first image processing on the second image to obtain a third image of the flawless character;
• perform second image processing on the second image to obtain N fourth images of the flawless character, and perform third image processing on the N fourth images respectively to obtain N fifth images of the flawless character, N being a positive integer greater than 1;
• calculate a similarity between each fifth image and the third image of the flawless character to obtain N similarities of the flawless character, and determine a defect threshold according to similarities of the flawless characters;
• compare the similarity with the defect threshold, and determine that a target fourth image corresponding to the fifth image contains a defective character when the similarity is greater than the defect threshold, the target fourth image being one of the N fourth images;
• segment a background image from the background area, a size of the background image being equal to a size of the target fourth image;
• and
• adjust brightness of the background image to obtain at least one adjusted image, and synthesize the target fourth image and the at least one adjusted image to obtain at least one synthesized image.

A non-transitory storage medium having stored thereon computer-readable instructions that, when the computer-readable instructions are executed by a processor to implement the following method:

• obtaining an original image with flawless characters, determining a character area comprising the flawless characters and a background area of the original image, and determining a position of each flawless character in the character area;
• segmenting the character area according to the position of the flawless character in the character area to obtain a first image of the flawless character;
• removing a background from the first image to obtain a second image of the flawless character;
• performing first image processing on the second image to obtain a third image of the flawless character;
• performing second image processing on the second image to obtain N fourth images of the flawless character, and performing third image processing on the N fourth images respectively to obtain N fifth images of the flawless character, N being a positive integer greater than 1;
• calculating a similarity between each fifth image and the third image of the flawless character to obtain N similarities of the flawless character, and determining a defect threshold according to similarities of the flawless characters;
• comparing the similarity with the defect threshold, and determining that a target fourth image corresponding to the fifth image contains a defective character when the similarity is greater than the defect threshold, the target fourth image being one of the N fourth images;
• segmenting a background image from the background area, a size of the background image being equal to a size of the target fourth image;
• and
• adjusting brightness of the background image to obtain at least one adjusted image, and synthesizing the target fourth image and the at least one adjusted image to obtain at least one synthesized image.