Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Reexamination Certificate
2005-03-29
2005-03-29
Do, Anh Hong (Department: 2624)
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
C382S233000, C375S240110
Reexamination Certificate
active
06873739
ABSTRACT:
An image compression apparatus is provided, which includes a wavelet transformer, a quantizer, a comparator, a subtracter, a low data compressor and a high data compressor. The comparator compares the first quantization coefficients of the first quantization data, to output the maximum quantization coefficient. The subtracter subtracts the minimum quantization coefficient from the maximum quantization coefficient, to output a subtraction constant. The low data compressor subtracts the subtraction constant from the first quantization coefficients, to output low compression data obtained by compressing the first quantization data. The high data compressor sequentially generates first compression data obtained by coding the number of zero quantization coefficients each having at least one successive zero value among the second quantization coefficients, and second compression data obtained by coding the second quantization coefficients other than the zero quantization coefficients according to a coding rule, to output high compression data.
REFERENCES:
patent: 6031940 (2000-02-01), Chui et al.
patent: 6141446 (2000-10-01), Boliek et al.
patent: 6661842 (2003-12-01), Abousleman
patent: 0926896 (1999-06-01), None
Mihcak et al., “Low-Complexity Image Denoising Based on Statistical Modeling of Wavelet coefficients”, IEEE, Signal Processing Letter, vol. 6, No. 12, Dec. 1999, pps. 300-303.
Cho Kyeong-soon
Hong Seogil
Lee Seonyoung
Do Anh Hong
ECT, Inc.
Park John K.
Park & Sutton LLP
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