Apparatus and method for compressing still images without multip

Details Apparatus and method for compressing still images without multip Apparatus and method for compressing still images without multip

1990-04-19

1992-07-07

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 49, 358 75, 36441319, G06K 936, G06K 946, G06K 954, H04N 146

Patent

active

051290154

ABSTRACT:
Transforms such as the DCT are useful for image compression. One close relative of the DCT is preferred for its arithmetic simplicity. A method is described whereby the image compression is done with no multiplications. Other enhancements are made to improve image quality.

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Lee, B. C., "A Fast Cosine Transform", IEEE ASSP, vol. XXXIII, 1985.
Jalali and Rao, "Limited Wordlength and FDCT Processing Accuracy", IEEE ASSP-81, vol. III, pp. 1180-1182.
Wang, Z., "Reconsideration of `A Fast Computational Algorithm for the Discrete Cosine Transform,`" IEEE Trans. on Communications, vol. COM-31, No. 1, Jan. 1983.

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