Method of encoding and decoding image data by applying image...

Details Method of encoding and decoding image data by applying image... Method of encoding and decoding image data by applying image...

2006-02-22

2009-11-17

Bali, Vikkram (Department: 2624)

Image analysis

Color image processing

Compression of color images

C382S262000, C382S232000, C382S233000, C382S281000, C382S240000, C345S215000, C345S604000

Reexamination Certificate

active

07620240

ABSTRACT:
A method of encoding and decoding image data by applying an image capturing device includes generating a difference coding group, applying an modified Hadamard transform (MHT) on the difference coding group to generate a corresponding low-frequency parameter and a plurality of corresponding high-frequency parameters, adjusting the low-frequency parameter, adjusting the high-frequency parameters by a quantification factor, decoding the low-frequency parameter, decoding the high-frequency parameters by the quantification factor, and applying an inverse modified Hadamard transform (IMHT) on the low-frequency parameter and the high-frequency parameters to decode the difference coding group.

REFERENCES:
patent: 5402185 (1995-03-01), De With et al.
patent: 6269181 (2001-07-01), Acharya
patent: 6825876 (2004-11-01), Easwar et al.
patent: 6836572 (2004-12-01), Ishiga et al.
patent: 2003/0228068 (2003-12-01), Dhavala et al.
patent: 2006/0198556 (2006-09-01), Chen et al.

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