04731863 is referenced by 48 patents and cites 12 patents.

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.

Title
Digital image processing method employing histogram peak detection
Application Number
6/848509
Publication Number
4731863
Application Date
April 7, 1986
Publication Date
March 15, 1988
Inventor
Ralph Schaetzing
Pittsford
NY, US
Muhammed I Sezan
Rochester
NY, US
Agent
Thomas H Close
Assignee
Eastman Kodak Company
NY, US
IPC
G06K 9/52
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