Image analysis – Image compression or coding
Patent
1996-01-25
1999-05-11
Couso, Jose L.
Image analysis
Image compression or coding
G06K9/36
Patent
active
059036699
ABSTRACT:
In compressing an image in units of blocks, the image is compressed in accordance with the size of a redundant portion of the image to increase the compression factor of the image data. An image compression apparatus for encoding an image in units of blocks includes a size discrimination unit for discriminating a block image size suitable for encoding and compressing a predetermined image area, a generation unit for dividing the image area to generate a plurality of block images having different sizes on the basis of the discrimination result of the size discrimination unit, and a compression unit for compressing each block image data representing a block image and generated from the generation unit, on the basis of the size of the block image data.
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IEEE Trans. On Accoustics, Speech and Signal Processing, Strobach, P., "Quadtree-Structured Recursive Plane Decomposition Coding of Images", vol. 39, No. 6, Jun. 1991, pp. 1380-1397.
Image and Multidimensional Signal Processing, Minneapolis, Institute of Electrical and Electronics Engineers, Ramirez, E., et al., Sub-Band Coding of Images With Quadtree-Guided Recursive Polynomial Decomposition, vol. 5, Apr. 1993, pp. 578-581.
Canon Kabushiki Kaisha
Couso Jose L.
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