Image analysis – Histogram processing – For setting a threshold
Patent
1987-03-13
1989-01-31
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 36, 382 41, 382 43, 382 49, G06K 936
Patent
active
048022322
ABSTRACT:
The present invention relates to a method of reducing the quantity of overhead data in image coding wherein the image is subdivided into partial image regions and these partial image regions are characterized by classes. To determine the class, the partial image region is transformed by discrete transformation into the spectral range and the absolute values of the spectral coefficients are then processed in a manner such that all absolute values are compared with their visual discernibility thresholds, singular coefficients are neglected and the result can be represented by term variables, i.e. by a minimum quantity of different individual coefficients. The classes derived from a counter and from a class decoding gate array are compared with the pattern representing the term variables until the first congruent class is found. The associated class code is forwarded for further processing.
REFERENCES:
patent: 4241329 (1980-12-01), Bahler et al.
patent: 4394774 (1983-07-01), Widergreen et al.
patent: 4464788 (1984-08-01), Sternberg et al.
patent: 4698672 (1987-10-01), Chen et al.
patent: 4698689 (1987-10-01), Tzou
patent: 4703349 (1987-10-01), Bernstein
patent: 4704628 (1987-11-01), Chen et al.
A Subjectively Adapted Image Communication System by Herbert Lohscheller, IEEE Transactions on Communications, vol. Com-32, No. 12, Dec. 1984, pp. 1316-1322.
Piecewise Fourier Transformation for Picture Bandwidth Compression; Grant B. Anderson and Thomas S. Huang, IEEE Transactions on Communication Technology, Apr. 1971, pp. 133-140.
Scene Adaptive Coder; Wen-Hsiung Chen and William K. Pratt, IEEE Transactions on Communications, vol. Com-32, No. 3, Mar. 1984, pp. 225-232.
Vision Adapted Progressive Image Transmission, Herbert Lohscheller, Signal Processing II: Theories and Applications, Elsevier Science Publishers B.V. (North-Holland) EURASIP, 1983, pp. 191-194.
ANT Nachrichtentechnik GmbH
Boudreau Leo H.
Couso Jose L.
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