Image analysis – Histogram processing – For setting a threshold
Patent
1991-09-05
1993-12-28
Mancuso, Joseph
Image analysis
Histogram processing
For setting a threshold
359561, 382 42, 382 43, G06K 976
Patent
active
052747166
ABSTRACT:
In a joint transform correlator, a technique that performs a correlation processing between two-dimensional images by using a coherent beam, this invention forms a feedback system in which two-dimensional correlation coefficients between at least one reference image and at least one signal image obtained as a result of a correlation processing are input to a linear or non-linear transfer function and in which the intensities of light passing through the reference images corresponding to the correlation coefficients are virtually changed according to the output of the transfer function. And then in this condition a similar correlation processing is performed. This loop of processing is repeated. In this case, when, in addition to an expression of the transfer function, other items--which include a dynamic range of the transfer function and a non-linear transfer function are used, the threshold values are changed according to such conditions as the number and kind of reference images and the distribution of correlation coefficients.
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Iwaki Tadao
Mitsuoka Yasuyuki
Yoshikawa Tomohiro
Adams Bruce L.
Mancuso Joseph
Seiko Instruments Inc.
Wilks Van C.
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