Image analysis – Image enhancement or restoration – Edge or contour enhancement
Reexamination Certificate
2005-07-05
2005-07-05
Mehta, Bhavesh M. (Department: 2625)
Image analysis
Image enhancement or restoration
Edge or contour enhancement
C382S264000, C382S272000, C382S274000
Reexamination Certificate
active
06915023
ABSTRACT:
Filtration of an input signal implemented in the horizontal or vertical direction may disorder the gradation in oblique directions, so that oblique lines may become jagged. To deal with this situation, the following components are provided to process the input signal: a waveform correcting means (6) having a correcting characteristic that the slope for correction in the medium-luminance range is greater than that in the high-luminance range or in the low-luminance range; a processing means (7) for extracting the deviation of the input signal processed by the waveform correcting means; a picture edge strength detecting means (1); and a processing means (8) for performing operations based on the deviation of the input signal and the picture edge strength.
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Supplementary European Search Report mailed Mar. 1, 2004 in corresponding EP application 00979016.3-2202-JP0008428.
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Hamada Shohichi
Ishimochi Haruki
Mehta Bhavesh M.
Nixon & Vanderhye P.C.
Perungavoor Sath V
Sharp Kabushiki Kaisha
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