Image analysis – Histogram processing – For setting a threshold
Patent
1992-10-07
1995-01-24
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
348384, 348398, 348424, G06K 936
Patent
active
053848691
ABSTRACT:
Image processing apparatus is described for filtering a digital representation of a raster scanned image into a plurality of sub-bands in the two-dimensional spatial frequency domain, the resolution of the raster scanned image in a first direction (usually the horizontal direction) being greater than the resolution of the raster scanned image in a second direction (usually the vertical direction). The image processing apparatus has a decimation filter means comprising a number of multi-tap digital decimation filters for spatial filtering in the first and second directions. The mean of the filter lengths of the filters used for filtering in the first direction is greater than that of the filters used for filtering in the second direction. Complementary interpolation apparatus for reconstructing the image from the plurality of sub-bands is also described.
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patent: 5220422 (1993-06-01), Oh
patent: 5223926 (1993-06-01), Stone
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Ludgate Michael J.
Soloff Jonathan M.
Stone Jonathan J.
Wilkinson James H.
Frommer William S.
Moore David K.
Sinderbrand Alvin
Sony United Kingdom Limited
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