Patent ID: 11875520
Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. The system of claim 13, wherein the determining, based on the first low-frequency image and the first high-frequency image, a featuring region in the first high-frequency image includes:
obtaining a first matrix by performing a high-pass filtering on the first low-frequency image, wherein the first matrix includes a plurality of first elements, and the plurality of first elements correspond to the plurality of first pixels;
obtaining a second matrix based on the plurality of first elements and the plurality of second pixels, wherein the second matrix includes a plurality of second elements corresponding to the plurality of second pixels, and each of the plurality of second elements is determined based on a sign of the corresponding first element and a sign of the corresponding second pixel; and
determining the featuring region based at least in part on the second matrix.