Image data processing method and apparatus

Details Image data processing method and apparatus Image data processing method and apparatus

1991-07-30

1995-05-16

Mancuso, Joseph

Image analysis

Image compression or coding

248403, G06K 936

Patent

active

054168546

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 including N.times.N 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: 4908874 (1990-03-01), Gabriel
patent: 5014198 (1991-05-01), Umemura
patent: 5054103 (1991-10-01), Yasuda et al.
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
Gonzalez, Rafael, "Digital Image Processing", Second Edition, Chaper 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.

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