Image processing apparatus capable of obtaining multi-level data

Details Image processing apparatus capable of obtaining multi-level data Image processing apparatus capable of obtaining multi-level data

1991-07-16

1992-06-09

Brinich, Stephen

Image analysis

Histogram processing

For setting a threshold

382 52, G06K 938

Patent

active

051214466

ABSTRACT:
An image processing apparatus includes an input unit for inputting data on an object pixel, a calculation unit for calculating an average density value of a predetermined area, and a quantization unit for converting the data on the object pixel into multi-level data on the basis of the average density value obtained by the calculation means.

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patent: 4680645 (1987-07-01), Dispoto et al.
patent: 4853792 (1989-08-01), Katsuta et al.
patent: 4868884 (1989-09-01), Miyazaki et al.

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