Truncated subband coding of images

Details Truncated subband coding of images Truncated subband coding of images

1987-05-04

1989-03-28

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 41, 36472405, 3647241, G06K 936

Patent

active

048171824

ABSTRACT:
Image data is analyzed in a number of iterated analysis procedures, using two-dimensional quadrature mirror filters to separate low-pass spatial filter response component and three differently oriented high-pass spatial filter response components, which filter response components are decimated in both dimensions. The high-pass filter response components are coded as is. The low-pass filter response component is coded as is only in the last iteration; in the earlier analysis procedures the low-pass filter response component provides the input data for the secceeding analysis procedure.

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patent: 4691292 (1987-09-01), Rothweiler
patent: 4709394 (1987-11-01), Bessler et al.
patent: 4718104 (1988-01-01), Anderson
"An Efficient Pyramid Image Coding System", A. Tran et al., CH 2396-0/87/0000-0744 $01.00 copyrighted 1987 IEEE.
"Low-Rate Speech Encoding Using Vector Quantization and Subband Coding", H. Abut & S. Ergezinger, CH 2243-4/86/0000-0449 $1.00 copyrighted 1986 IEEE.
"Subband Coding of Images", J. W. Woods & S. D. O'Neil, 0096-3518/86/1000-1278 $01.00 copyrighted 1986 IEEE.
"An Efficient Image Representation For Multiscale Analysis", Stephane Mallat, Topical Meeting On Machine Vision, Incline Village, Nevada 3/18-20/1987 pp. 172-175.

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