Image information compression apparatus

Details Image information compression apparatus Image information compression apparatus

1990-04-03

1991-05-07

Smith, Jerry

Boots, shoes, and leggings

382 56, G06F 1542, G06F 1562

Patent

active

050141988

ABSTRACT:
An image compression apparatus for compressing medical information such as X-ray image data divides the image data into blocks and extracts the region of interest from the image data, excluding the background portion. The image data blocks containing the region of interest are orthogonally transformed by discrete cosine transformation for forming a bit allocation table. The bit assignments in the bit allocation table for the orthogonally-transformed coefficients are adapted only for the image data containing the region of interest. The original image data blocks are orthogonally transformed and quantized according to the bit allocation table to obtain the compressed image data.

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