Method for illumination independent change detection in a...

Details Method for illumination independent change detection in a... Method for illumination independent change detection in a...

2006-08-08

2006-08-08

Armed, Samir (Department: 2623)

Image analysis

Pattern recognition

Template matching

C382S217000

Reexamination Certificate

active

07088863

ABSTRACT:
A method for illumination-independent change detection in a pair of original registered gray images based on blob extraction. Blobs are extracted from the two original images and their negatives, using an enhanced blob extraction algorithm based on connectivity analysis along gray-levels. Blobs extracted from the first original and negative images are compared with blobs extracted from the second original and negative images to determine whether each blob has a corresponding blob, i.e. whether it is a matched or unmatched blob. All unmatched blobs are tested for significance as “blobs of change” using a fitness measure based on either a ratio of saliency gradients, or a product of this ratio and a gradient distribution measure. The disclosed method is exact, fast, robust, illumination-insensitive, and has low time-complexity

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Teasdale et al. “Functional MRI Study of the Cognitive Generation of Affect”, American Journal of Psychiatry (GPSI), v156 n2, p. 209-215, p. 7 Feb. 1999.

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