Image analysis – Image compression or coding
Reexamination Certificate
2006-11-28
2006-11-28
Sherali, Ishrat (Department: 2624)
Image analysis
Image compression or coding
Reexamination Certificate
active
07142720
ABSTRACT:
The present invention relates to an image data reconstructing apparatus for reconstructing an original image by dividing image data into a plurality of blocks each comprising NXN picture elements, performing two-dimensional orthogonal transform on each of said blocks, quantizing and encoding the result of said transform, decoding the encoded result, dequantizing and two-dimensional inverse orthogonal transforming the above result, wherein an operation associated with the multiplication is skipped if a multiplication by zero is detected when two-dimensional inverse orthogonal transform is performed. Before performing dequantization, two block volume of buffer is provided before or after performing two-dimensional inverse orthogonal transform for executing a pipeline process.Furthermore, two-dimensional inverse orthogonal transform is performed by repeating two times a process of one-dimensional inverse orthogonal transform and matrix transposition, thus the matrix transposition being performed as the result of one-dimensional inverse orthogonal transform which is stored in buffer.
REFERENCES:
patent: 4791598 (1988-12-01), Liou et al.
patent: 4881192 (1989-11-01), Woudsma et al.
patent: 4908874 (1990-03-01), Gabriel
patent: 5014198 (1991-05-01), Umemura
patent: 5054103 (1991-10-01), Yasuda et al.
patent: 5073821 (1991-12-01), Juri
patent: 5086488 (1992-02-01), Kato et al.
patent: 5126962 (1992-06-01), Chiang
patent: 5150433 (1992-09-01), Daly
patent: 5163103 (1992-11-01), Uetani
patent: 5268853 (1993-12-01), Tanaka et al.
patent: 5416854 (1995-05-01), Fukuda et al.
patent: 0 248 729 (1987-06-01), None
patent: 88/07725 (1988-10-01), None
patent: 0 443 114 (1991-08-01), None
patent: 63-67081 (1988-03-01), None
Gonzalez, Rafael, “Digital Image Processing”, Second Edition, Chapter 6, “Image Coding”, pp. 255-311.
Granville, E. Ott, Ph.D., “IEEE 1987 National Aerospace and Electronics Conference NAECON 1987”, May 18-22, 1987, pp. 39-43.
Carlach, J.C., et al., “IEEE 1989 International Conference on Acoustics, Speech and Signal Processing”, pp. 22-39.
Patent Abstracts of Japan, vol. 13, No. 210 (P-872) May 17, 1989 & JP-A-1026988 (Fujitsu) Jan. 30, 1989, Abstract.
Chiba Hirotaka
Fukuda Masahiro
Murashita Kimitaka
Noda Tsugio
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