Patent ID: 11908038
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. An image transformation method, applicable to a computer device, the method comprising:
obtaining a transformed image corresponding to an original image;
performing frequency domain transformation on the transformed image to obtain a converted brightness matrix of the transformed image in a frequency domain space;
extracting a pixel value of an identification image from the converted brightness matrix, the identification image being an image obtained by converting identification information of the original image; and
performing image identification on the identification image to obtain the identification information of the original image,
wherein the extracting the pixel value comprises:
determining an image embedding bit in the converted brightness matrix;
obtaining a pixel value of the image embedding bit in the converted brightness matrix;
determining an embedding intensity factor, and determining a pixel adjustment range by using a pixel conversion formula, which is based on the embedding intensity factor and the pixel value of the image embedding bit in the identification image, wherein one of different pixel conversion formulas is selected according to the pixel value of the image embedding bit; and
determining the pixel value of the identification image based on the pixel value of the image embedding bit in the converted brightness matrix and the pixel adjustment range, to obtain the identification image.