Image analysis – Histogram processing – For setting a threshold
Patent
1986-04-07
1988-03-15
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358282, 358284, 364414, G06K 952
Patent
active
047318635
ABSTRACT:
In many digital image processing methods, it is desirable to selectively apply digital image processing to identifiable structures in the image. For this purpose it is known to select gray level thresholds between structures based upon the location of corresponding peaks in the gray level histogram of the digital image. However, it is a problem to automatically detect the locations of peaks in the histogram and to select the gray level thresholds. The present invention provides a method for automatically detecting the peaks and selecting gray level thresholds for segmenting a digital image into distinguishable structures including the steps of detecting peaks in a gray level histogram of the digital image by applying smoothing and differencing operators to the gray level histogram to generate a peak detection function wherein positive to negative zero crossings of the peak detection function represent the start of a peak, and maxima following such a zero crossing represents the end of a peak.
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Schaetzing Ralph
Sezan Muhammed I.
Boudreau Leo H.
Brim Steven
Close Thomas H.
Eastman Kodak Company
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