Precompression extrapolation method

Details Precompression extrapolation method Precompression extrapolation method

1996-06-04

1999-09-07

Shalwala, Bipin

Image analysis

Image transformation or preprocessing

382236, 382242, 382254, 382262, 382276, 382300, 358426, G06K 936, G06K 940, G06K 946, G06K 948

Patent

active

059499192

ABSTRACT:
A precompression extrapolation method extrapolates image features of arbitrary configuration to a predefined configuration to facilitate compression of the image features. This extrapolation method allows compression of arbitrary image features to be performed in a conventional manner, such as discrete cosine transform or lattice wavelet compression. This method includes defining an extrapolation block boundary about an object or image feature that is bounded by a feature boundary. Pixels within the block, but not included in the image feature, are identified as non-feature pixels. The feature pixels in the feature boundary include pixel values that correspond to the image characteristics of the pixels. The non-feature pixels adjacent the pixels of the feature boundary are assigned pixel values that include the pixel values of the adjacent feature boundary pixels.

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