Method for compressing character image data

Image analysis – Histogram processing – For setting a threshold

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Details

364900, 358426, 3582612, G06K 936, H04N 1415

Patent

active

050581872

ABSTRACT:
A method for compressing font data wherein, for example, each byte of a font is provided with a compressing code. A bit map of the font is stored in a font file which is separated into a reference byte and a comparator byte. The two bytes are compared with each other. In response to the comparison a specific compression code is assigned and stored in the compression file. In the comparison, the present byte of a font to be compressed is compared with a byte which is positioned immediately before the present byte. When no byte is positioned immediately before the present byte, the byte is compared with OOH.

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