Image analysis – Histogram processing – For setting a threshold
Patent
1991-12-12
1994-03-01
Couso, Jose L.
Image analysis
Histogram processing
For setting a threshold
382 1, 382 30, 382 34, 348135, 348148, 348152, G06K 900, G06K 920, G06K 962, G06K 976
Patent
active
052915638
ABSTRACT:
An object detection system and a state transition detection system capable of realizing the improved robustness, general applicability, and customizability. In the system, features for the target image are calculated, where the features including at least one of a quantity expressing a difference of contributions by principal axis components and secondary axis components in a distribution of brightness of corresponding points in each target area on the target image and the reference image, and a quantity expressing a difference between a direction of a principal axis with respect to a vector (1, 1) direction in the distribution of brightness of corresponding points in each target area on the target image and the reference image; and the calculated features for the target image is classified into a first class corresponding to a presence of the target object and a second class corresponding to an absence of the target by using a classifier, according to which a detection result indicating the presence or absence of the target object is outputted.
REFERENCES:
patent: 4323880 (1982-04-01), Lucas
patent: 5027413 (1991-06-01), Barnard
Couso Jose L.
Nippon Telegraph and Telephone Corporation
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