Image analysis – Image enhancement or restoration – Variable threshold – gain – or slice level
Reexamination Certificate
2005-11-01
2005-11-01
Mehta, Bhavesh M. (Department: 2621)
Image analysis
Image enhancement or restoration
Variable threshold, gain, or slice level
C382S271000
Reexamination Certificate
active
06961476
ABSTRACT:
The present invention provides to image processing methods that include a method of selecting an optimal threshold value (to) for an image comprising the steps of: obtaining an image; selecting a test segment of the said image; determining the mean feature size (S) of features appearing in the test segment at each of a plurality of threshold values (t), so as to produce mean feature size data (S(t)); selecting a relevant subset of the mean feature size data (S(t)); and determining an optimal threshold value (to) as a function of said subset of the mean feature size data. The present invention additionally provides methods of thresholding an image to produce a binary image by application of the optimal threshold value (to) determined according to the methods of the present invention.
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Dahl Philip Y.
Mehta Bhavesh M.
Rosario-Vasquez Dennis
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