Image analysis – Histogram processing – For setting a threshold
Patent
1988-02-22
1988-12-13
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358284, 382 50, 382 51, G06K 940
Patent
active
047916788
ABSTRACT:
An image processing system mainly used in an image verification system for detecting and correcting distortion of an input image includes the following devices; an image memory for storing a digitized image before, during, and after correction, a working memory for temporarily storing intermediate data of the image on correction, density level extension devices for extending the density level or gradation of the image by repeatedly reading out the contents of the image memory and the working memory by using a matrix window containing picture elements of the image, a density slope detection device for detecting the extended density level and calculating a density slope or gradient by using the matrix window, and a correction device for correcting density distribution and line width of the image based on the extended density level and the calculated density slope.
REFERENCES:
patent: 4003024 (1977-01-01), Rigonati et al.
patent: 4354243 (1982-10-01), Ryan et al.
patent: 4360883 (1982-11-01), Ejiri et al.
patent: 4466123 (1984-08-01), Arai et al.
patent: 4467364 (1984-08-01), Konagaya
patent: 4472736 (1984-09-01), Ushio et al.
patent: 4633314 (1986-12-01), Kurata et al.
IBM Journal Research and Development, vol. 27, No. 4, Jul. 1983, pp. 400-410, Armonk, New York, US; J. M. White et al.
Pergamon Press 1968, vol. 1, pp. 33-61 Great Britain "Distance functions on Digital Pictures" by A. Rosenfeld, J. L. Pfaltz.
Electronics Science Series, vol. 84, pp. 59-77 Japan, "Computer Image Processing" by T. Aguin and M. Nakazima.
Gotoh Toshiyuki
Iwase Hiromichi
Ozaki Tohru
Sasaki Shigeru
Toriu Takashi
Boudreau Leo H.
Fujitsu Limited
Mancuso Joseph
LandOfFree
Image processing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image processing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2201751