Image noise detection

Details Image noise detection Image noise detection

2011-05-10

2011-05-10

Alavi, Amir (Department: 2624)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

Reexamination Certificate

active

07940996

ABSTRACT:
An image comprises columns and rows of blocks of pixels. In each row and/or column, a series of pairs of blocks of pixels comprise first and second adjacent blocks of pixels, with the second block in a previous pair of blocks corresponding to the first block in a next pair of blocks. For at least a part of the pairs of blocks in at least a part of the rows and/or columns of blocks in the image, a method determines an indication of a block boundary between the first and second blocks. The method decides based on the determined indication whether the block boundary is a visible or invisible block boundary. These steps are then repeated for a next pair. If at least one invisible block boundary is present between two visible block boundaries, it is decided that a uniform image distortion zone has been detected.

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Pan, F. et al., “A Locally-Adaptive Algorithm for Measuring Blocking Artifacts in Images and Videos,” Proceedings of the International Symposium on Circuits and Systems, May 23, 2004, pp. 925-928.

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