Detecting slant scratches in images of a video signal

Details Detecting slant scratches in images of a video signal Detecting slant scratches in images of a video signal

1997-09-10

1999-11-16

Rogers, Scott

Image analysis

Image enhancement or restoration

Artifact removal or suppression

348607, H04N 1409, G06K 940, G06T 500

Patent

active

059871873

ABSTRACT:
A video signal-processing device includes an arrangement for detecting film scratches. To distinguish slant scratches in the video signal from other scratch-like image structures in a safe manner, the arrangement for detecting scratches is intended to determine whether at least the section of a scratch extends from the lower margin of an image N-1 preceding a current image N into the upper margin of the current image N, and whether at least a further section of a scratch extends from the lower margin of a current image N into the upper margin of an image N+1 succeeding the current image N.

REFERENCES:
patent: 4941186 (1990-07-01), Massmann et al.
patent: 5097521 (1992-03-01), Massmann
patent: 5589887 (1996-12-01), Wischermann
patent: 5606631 (1997-02-01), Weiss et al.

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