Image analysis – Histogram processing – For setting a threshold
Patent
1990-05-04
1993-06-08
Razavi, Michael T.
Image analysis
Histogram processing
For setting a threshold
382 22, 358166, 358167, G06K 936
Patent
active
052186490
ABSTRACT:
A system for enhancing the quality of an image that suffers from staircase effects, contouring effects, and granular noise, without affecting the existing method of creating the image is disclosed. The enhancement system identifies the edge and nonedge regions in the decoded image, and then filters those regions in order to reduce the specific type of quality degradation that generally occurs in the specific type of region. The system is integrated into a processing system including means for receiving and displaying digital image data. The system receives the digital image data, differentiates between edge data and the nonedge data within the digital image data, and filters the image data accordingly. The filtered edge data and the filtered nonedge data are combined to form an enhanced image. A multi-pass filtering system is also disclosed.
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Kundu Amlan
Ramamoorthy V.
Jung Yon
Razavi Michael T.
Schulte Timothy R.
U S West Advanced Technologies, Inc.
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