Apparatus for substituting character data for image data using o

Details Apparatus for substituting character data for image data using o Apparatus for substituting character data for image data using o

1994-06-01

1995-12-05

Boudreau, Leo H.

Image analysis

Image compression or coding

Substantial processing of image in compressed form

358433, 358450, 345194, 345202, 382250, G06K 936

Patent

active

054737044

ABSTRACT:
A character font combining apparatus having a memory storing data-compressed image data by dividing a digital original image data into a plurality of blocks and applying orthogonal conversion and encoding to the image data for every block. The image data read out from this memory is decoded by a decoding processing circuit, and the orthogonal conversion coefficient is obtained for every block. A plurality of character fonts are stored in the font ROM, and each character font is constituted by at least the orthogonal conversion coefficient of one block, respectively. One of the block of the orthogonal conversion coefficient decoded by the decoding processing circuit and the block of the orthogonal conversion coefficient read out from the font ROM is encoded by the Huffman encoding processing circuit and written as the encoded data in the memory.

REFERENCES:
patent: 3824546 (1974-07-01), Kawasaki et al.
patent: 3869697 (1975-03-01), Kawasaki
patent: 4750212 (1988-06-01), Yokomizo
patent: 4791680 (1988-12-01), Yokoe et al.
patent: 5301027 (1994-04-01), Kiyofugi et al.
Arps et al., "Control Character Insertion into Arithmetically Encoded Strings", IBM Technical Disclosure Bulletin, vol. 25, No. 4, Sep. 1982, pp. 2051-2052.

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