Structure descriptors for image processing

摘要

A structure descriptor for an m×n pixel block of an image may be determined. The m×n pixel block may contain a primary pixel having a primary pixel value and a plurality of secondary pixels having respective secondary pixel values. The structure descriptor may include a plurality of structure indicators each associated with a respective secondary pixel. The respective structure indicators may be based on the primary pixel value and the respective secondary pixel value of the associated secondary pixel. Based on the structure descriptor, a structure value for the m×n pixel block may be determined. Based on the structure value, image processing may be applied to the m×n pixel block.

主权项

1. A method comprising:
determining, by a computing device, a structure descriptor for an m×n pixel block of an image, wherein the m×n pixel block contains a primary pixel having a primary pixel value and a plurality of secondary pixels having respective secondary pixel values, wherein the structure descriptor includes a plurality of structure indicators each associated with a respective secondary pixel, and wherein the respective structure indicators are based on the primary pixel value and the respective secondary pixel value of the associated secondary pixel; based on the structure descriptor, determining a structure value for the m×n pixel block; based on the structure value, applying image processing to the m×n pixel block to form a second m×n pixel block of the image; determining a second structure descriptor for the second m×n pixel block; based on the second structure descriptor, determining a second structure value for the second m×n pixel block; and based on the structure value and the second structure value, merging the m×n pixel block and the second m×n pixel block, wherein merging the m×n pixel block and the second m×n pixel block comprises determining an absolute difference between the first structure value and the second structure value, determining that the absolute difference is greater than a threshold difference, and based on the absolute difference being greater than the threshold difference, assigning the m×n pixel block more weight than the second m×n pixel block during the merging.