Image analysis – Histogram processing – For setting a threshold
Patent
1993-04-20
1995-03-14
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 27, 382 34, G06K 948, G06K 956, G06K 968
Patent
active
053982924
ABSTRACT:
Edge detecting masks each having a sensing directivity to a specific direction are arranged with each directivity direction shifted by a given angular interval from the neighboring masks. A sum-of-products computation is performed between weighting elements in each of the so-arranged masks and image data indicating the brightness or tint of respective pixels. A selecting device selects a mask which exhibits the maximum sum-of-products output value among others and also selects two or three more masks before and behind the selected mask according to the interpolation method employed. An estimate computing device performs interpolation using the angles and output values of the selected edge detecting masks to estimate a true edge direction.
REFERENCES:
patent: 4547895 (1985-10-01), Mita et al.
patent: 4803736 (1989-02-01), Grossberg et al.
patent: 4868752 (1989-09-01), Fujii et al.
patent: 4896364 (1990-01-01), Lohscheller
patent: 4970653 (1990-11-01), Kenue
patent: 5019903 (1991-05-01), Dougall
patent: 5144684 (1992-09-01), Inada et al.
patent: 5212740 (1993-05-01), Paek et al.
Gonzalez et al., Digital Image Processing, Addison-Wesley (1992), pp. 5 414-416.
Publication "Linear Feature Extraction and Description," Authors Nevatia and Babu (1979), Computer Graphics and Image Processing, 13, pp. 257-269.
"Digital Picture Processing", Azriel Rosenfeld, Avnash C. Kak, Academic Press (1976), certain pages provided for PTO (Contents, Preface, Acknowledgements, pp. 296-297).
Boudreau Leo H.
Cammarata Michael R.
Honda Giken Kogyo Kabushiki Kaisha
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