Image input system

Details Image input system Image input system

1986-03-17

1989-05-09

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 50, 341 95, G06K 900

Patent

active

048295841

ABSTRACT:
Optical image data read by a photoelectric converter are converted into N-bit digital signals through A-D converter, which are inputted in a look-up table memory as address data. The memory stores M-bit digital data which are linearly dependent on optical density of the image. Thus, the N-bit digital signals are transformed to the M-bits digital signals and a reproduced image obtained as an output of the memory has a optical density which is corresponding to that of the original image.

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patent: 4667245 (1987-05-01), Matsumoto
patent: 4697236 (1987-09-01), Butts et al.
patent: 4700236 (1987-10-01), Abe

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