Image analysis – Image compression or coding – Transform coding
Reexamination Certificate
2007-10-30
2007-10-30
Dang, Duy M. (Department: 2624)
Image analysis
Image compression or coding
Transform coding
C382S232000
Reexamination Certificate
active
10639371
ABSTRACT:
A system and method for determining image quality by analyzing DCT information. Included is a system for measuring image quality of a compressed image divided into a plurality of blocks, wherein each block has frequency domain components including a DC coefficient value and a plurality of AC coefficient values, the system comprising: a module for analyzing the DC coefficient values from the plurality of blocks to quantify at least one image quality measurement selected from the group consisting of: average brightness, peak brightness, and contrast; and a module for analyzing the AC coefficient values from the plurality of blocks to quantify a focus measurement.
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Dang Duy M.
Hoffman Warnick & D'Alessandro LLC
Lashmit Douglas A.
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