Image encoding apparatus and method, program code, and...

Details Image encoding apparatus and method, program code, and... Image encoding apparatus and method, program code, and...

2006-03-14

2006-03-14

Dang, Duy M. (Department: 2627)

Image analysis

Image compression or coding

Pyramid, hierarchy, or tree structure

C382S246000

Reexamination Certificate

active

07013050

ABSTRACT:
Image data is decomposed into subbands and quantized by a discrete wavelet transformer (102) and coefficient quantizer (103). On the other hand, a high-resolution region information input unit (105) inputs region designation information H(x, y) that designates a region which requires a high resolution, and a mask generator (106) obtains, based on H(x, y), mask information M(S, x, y) indicating if coefficients of HL2, LH2, and HH2are generated with reference to pixels of the high-resolution region. A coefficient correction unit (104) corrects the quantized coefficients of respective subbands with reference to M(S, x, y) if subband S is one of HL2, LH2, and HH2, and does not correct if subband S is other than HL2, LH2, and HH2.

REFERENCES:
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patent: 6028963 (2000-02-01), Kajiwara
patent: 6031938 (2000-02-01), Kajiwara
patent: 6101282 (2000-08-01), Hirabayashi et al.
patent: 6233355 (2001-05-01), Kajiwara
patent: 6310980 (2001-10-01), Kajiwara

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