Image encoder, image encoding method, recording medium and...

Details Image encoder, image encoding method, recording medium and... Image encoder, image encoding method, recording medium and...

2006-10-06

2010-02-16

Dang, Duy M (Department: 2624)

Image analysis

Image compression or coding

Quantization

C382S232000, C382S243000

Reexamination Certificate

active

07664334

ABSTRACT:
A processor performs layout analysis, and classifies pieces of bitmap data into a character area and a picture area. The processor divides each of the character area and the picture area into a plurality of tiles having a predetermined shape, thereby creating a table including information representing either character attribute or picture attribute in association with each tile number. The processor performs scalar quantization for data of each tile using a quantization coefficient for characters or pictures, based on the created table. The processor encodes the data of each tile using an SNR progressive technique or a resolution progressive technique, and performs post quantization for the data using a quantization parameter for characters or pictures. Then, the processor stores the encoded data into a storage device.

REFERENCES:
patent: 5999664 (1999-12-01), Mahoney et al.
patent: 6327392 (2001-12-01), Li
patent: H09-205647 (1997-08-01), None
patent: 2002-152516 (2002-05-01), None

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