Signal processing apparatus and method, recording medium,...

Details Signal processing apparatus and method, recording medium,... Signal processing apparatus and method, recording medium,...

2006-09-12

2006-09-12

Tung, Kee M. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S612000, C345S615000, C345S639000, C345S643000

Reexamination Certificate

active

07106346

ABSTRACT:
An n-filter according to the present invention includes a nonlinear filter, a pattern detector, and a switch. The nonlinear filter maintains a steep edge whose size is larger than a predetermined threshold in fluctuations of pixels constituting an input image signal and, at the same time, smoothes a non-edge portion that does not include the edge. The pattern detector detects a fine edge in the fluctuations of the pixels constituting the input image signal and notifies the switch that the fine edge exists. The switch outputs the input image signal or an image signal output from the nonlinear filter to the subsequent stage in accordance with the notification from the pattern detector.

REFERENCES:
patent: 6091388 (2000-07-01), Kanbe et al.
patent: 6475516 (2002-11-01), DiCosmo et al.
patent: 6684000 (2004-01-01), Sakurai et al.
patent: 2003/0112796 (2003-06-01), Kwan
patent: 2004/0017224 (2004-01-01), Turner et al.
patent: 2001-298621 (2001-10-01), None

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