Method and apparatus for removing false contours

Details Method and apparatus for removing false contours Method and apparatus for removing false contours

2007-02-20

2007-02-20

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S690000

Reexamination Certificate

active

10724238

ABSTRACT:
A method and apparatus for removing false contours in a pulse number modulation (PNM) digital display device having a plasma display panel (PDP). The method involves a) comparing the input data with the comparison data and calculating a plurality of possible output data in consideration of an index error between the input data and error-diffused input data so that the false contours can be removed, the error-diffused input data being obtained by diffusing a quantization error that has occurred in pixels adjacent to the input data in the current frame; b) detecting an index error between the input data and the error-diffused input data; and c) selecting one from among the plurality of possible output data obtained in step a) in consideration of the index error detected in step b).

REFERENCES:
patent: 6097368 (2000-08-01), Zhu et al.
patent: 6100863 (2000-08-01), Zhu
patent: 6441867 (2002-08-01), Daly
patent: 6661469 (2003-12-01), Kawabata et al.
patent: 7106476 (2006-09-01), Tonami et al.

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