Image analysis – Histogram processing – For setting a threshold
Patent
1992-08-24
1994-03-22
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
358430, G06K 936
Patent
active
052972208
ABSTRACT:
An image processing system for image compression and decompression includes a template making part for producing a template from an image with respect to one target pixel in the image, the template containing a prescribed number of reference pixels selected from among pixels preceding the target pixel on a plurality of scanning lines including a current scanning line, the reference pixels having respective colors which have been detected, a storage part for storing the colors of the reference pixels in the template, and a state index detector for detecting a state index of the template from the colors of the reference pixels by referring to a state index table in which correspondence between values of the state index and states of colors of the reference pixels is pre-defined, so that the image is encoded into a compressed image and the compressed image is decoded into a reconstructed image in accordance with the thus detected state index of the template.
REFERENCES:
patent: 4325085 (1982-04-01), Gooch
patent: 4425582 (1984-01-01), Kadakia et al.
patent: 4533957 (1985-08-01), Iiunuma
patent: 4901363 (1990-02-01), Toyokawa
Anderson D. R.
Moore David K.
Ricoh & Company, Ltd.
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