Adaptive M-tile sample producer

Details Adaptive M-tile sample producer Adaptive M-tile sample producer

1987-04-30

1988-11-01

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 382 54, 455307, H04N 521, H04N 514

Patent

active

047823895

ABSTRACT:
Apparatus is disclosed for adaptively producing a sample having a desired M-tile value, and includes a source of a set of input samples and a source of a control signal. Means are provided for adaptively masking or replacing a subset of the input samples with samples having a predetermined value in response to the control signal. A sorter receives the resulting masked samples and produces an ordered set of samples in rank order. Sample selecting means coupled to the output of the sorter provides an output sample from the location in the ordered set of samples corresponding to the desired M-tile, in response to the control signal.

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P. M. Narendra, "A Separable Median Filter for Image Noise Smoothing", 1978, IEEE, CH1318-5/78/0000-0137.
R. G. Harber, et al., "VLSI Implementation of a Fast Rank Order Filtering Algorithm", Proceedings ICASSP 85, Florida, vol. 3 of 4, PB1396-1399.
N. Demassieux, et al., "VLSI Architecture for One Chip Video Median Filter", Proceedings of ICASSP 85, pp. 1001-1004.

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