Image analysis – Histogram processing – For setting a threshold
Patent
1995-10-11
1999-05-25
Rogers, Scott
Image analysis
Histogram processing
For setting a threshold
382237, 382270, 382269, 358447, 358455, 358466, G06T 500, H04N 1407
Patent
active
059076658
ABSTRACT:
A method for transforming grayscale image data in accordance with preselected transformation factors may be accomplished by first reducing the number of gray image pixels by "punching to black" gray image pixels having intensity values less than a black punch value and by "punching to white" gray image pixels having intensity values greater than a white punch value. The resulting "punched" image data are then transformed in accordance with preselected transformation factors to create transformed image data. The transformed image data are then converted to binary image data, which may be reproduced in a conventional manner.
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Sobol Robert E.
Winternitz Barbara A.
Hewlett--Packard Company
Rogers Scott
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