Image analysis – Histogram processing – For setting a threshold
Patent
1982-04-05
1984-10-02
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
364823, 365 8, 365158, 382 42, 382 64, G06K 964
Patent
active
044752385
ABSTRACT:
An image correlation device utilizing the principle of magnetoresistance. A sensed image is compared to a preselected mask image to determine whether the two images match. The comparison is accomplished by electrically representing the sensed image along a first surface and the mask image along a second surface of magnetoresistive member or body of material (a magnetoresistive member is one which demonstrates a greater amount of electrical resistance transverse to a magnetic field to which the member is exposed than it does parallel to that field). Where the two images match such that there is a maximum number of corresponding points along these surfaces a maximum amount of current flows through the body. Moreover, matching images can be compared and a match recognized even where the images are at different positions along their respective top and bottom surfaces of the magnetoresistive block. This is accomplished by means of shifting the magnetic field to in effect shift the direction of the paths having the least amount of electrical resistance through the block. The device may also include a second magnetoresistive body so that both the object and the background can simultaneously by compared to preclude a match signal from occuring where one image has all the features of the second image along with some additional features not found in the second image.
REFERENCES:
patent: 3221301 (1965-11-01), Moyroud
patent: 3310665 (1967-03-01), Schimmel
patent: 3459928 (1969-08-01), Lerwill et al.
patent: 3459929 (1969-08-01), Lerwill et al.
patent: 3804519 (1974-04-01), Outeru et al.
patent: 3975710 (1976-08-01), Watanabe et al.
patent: 4209759 (1980-06-01), Volluet
patent: 4246474 (1981-01-01), Lazzari
LandOfFree
Magnetoresistive image correlation device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetoresistive image correlation device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetoresistive image correlation device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-529989