Image data coding apparatus

Details Image data coding apparatus Image data coding apparatus

1992-05-29

1993-12-28

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

382 22, 3582611, 3582612, G06K 936, H04N 1419

Patent

active

052747190

ABSTRACT:
An image data coding apparatus includes a coder for coding input binary data in a predetermined coding algorithm and for outputting coded data, a conversion circuit for repeatedly performing a converting operation with respect to binary image data supplied from an external unit, a determination circuit for determining a number of times which the converting operation should be repeated in the conversion circuit based on a condition in which, when data obtained by repeating the converting operation the number of times in the conversion circuit is coded by the coder, a number of codes representing coded data output from the coder is minimum; and a circuit, for supplying to the coder, as the input data, converted data obtained by repeating the conversion operation the number of times determined by the determination circuit. The image coding apparatus outputs the coded data and data representing the number of times the converting operation is repeated.

REFERENCES:
patent: 3987412 (1976-10-01), Morrin, II
patent: 4631521 (1986-12-01), El-Sherbini

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