Image compression method and apparatus using conditional quadtre

Details Image compression method and apparatus using conditional quadtre Image compression method and apparatus using conditional quadtre

1994-12-27

1998-03-03

Mancuso, Joseph

Image analysis

Image compression or coding

Pyramid, hierarchy, or tree structure

C06K 936

Patent

active

057244510

ABSTRACT:
An image compression method employing a conditional quadtree split method includes inputting image data in frame or field units as blocks having a predetermined size; generating an average value for all of the pixels in each block and a sub-block code value for determining whether to perform sequential quad-splitting operations on the block into a suitable sub-block according to image type; and outputting a quadtree map drawn according to the sub-block code value and the average value of each block, as a bit stream. An apparatus employing the method can transmit good quality image data having no distortion at a high transmission rate.

REFERENCES:
patent: 5225904 (1993-07-01), Golin et al.
patent: 5228098 (1993-07-01), Crinon et al.
Strobach et al., Space-Variant Regular Decomposition Quadtrees in Adaptive Interframe Coding, 1988, pp. 1096-1099.
Huang et al., A new motion compensation method for image sequence coding using hierachical grid interpolation, Feb. 1994, pp. 42-51.
IEEE Computer Graphics And Applications, vol. 8, No. 3, May 1988 Samet et al., "Hierarchical Data Structures and Algorithms for Computer Graphics", pp. 48-66.
Pattern Recognition, vol. 20, No. 33, pp. 309-319, 1987, Fiala et al. "Comparison of a regular and an irregular decomposition of regions and volumes".
Kim et al., "On The Hierarchical Variable Block Size Motion Estimation Technique For Motion Sequence Coding", SPIE, vol. 2094, pp. 372-383.

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