Method and apparatus for visual lossless image syntactic...

Details Method and apparatus for visual lossless image syntactic... Method and apparatus for visual lossless image syntactic...

2006-08-22

2006-08-22

Tran, Phuoc (Department: 2621)

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

C382S263000

Reexamination Certificate

active

07095903

ABSTRACT:
A visual perception threshold unit for image processing identifies a plurality of visual perception threshold levels to be associated with the pixels of a video frame, wherein the threshold levels define contrast levels above which a human eye can distinguish a pixel from among its neighboring pixels of the video frame. The present invention also includes a method of generating visual perception thresholds by analysis of the details of the video frames, estimating the parameters of the details, and defining a visual perception threshold for each detail in accordance with the estimated detail parameters. The present invention further includes a method of describing images by determining which details in the image can be distinguished by the human eye and which ones can only be detected by it.

REFERENCES:
patent: 5974159 (1999-10-01), Lubin et al.

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