Image analysis – Histogram processing – For setting a threshold
Patent
1987-05-08
1990-03-06
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
340731, G06K 942
Patent
active
049072846
ABSTRACT:
An image processing apparatus capable of shrinking or enlarging images. A plurality of bits representing the image to be processed are applied in word format to a plurality of gate circuits which selectively pass certain ones of the bits in each received word in accordance with a selected shrinking or enlargement scale factor. For shrinking the gate circuits pass selected ones of the bits forming each word, but less than the number of bits in a received word. For enlargement the gate circuits pass the full number of bits in each word, but cause the bits constituting a word at the output of the gate circuits to contain two or more bits of the same content as that of at least the first bit of each input word. Packing apparatus is provided to pack bits at the output of the gate circuits representing a shrunk image into words having a number of bits equal to that of input words to the gate circuits.
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patent: 4675908 (1987-06-01), Saito et al.
patent: 4729107 (1988-03-01), Hasegawa
Ledley, Digital Computer and Control Engineering, McGraw-Hill Book Company--1960, pp. 562-565.
Boudreau Leo H.
NEC Corporation
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