Patent Document ID: 8305438
Application ID: 12295053
Patent Status: 1

Claim One:
1. An automatic testing system for surveillance camera installations, comprising: an input port to receive “probe” images from at least one camera in the installation; a computer memory to store a reference image from at least the one camera; a computer processor to compare a probe image with a reference image from the same camera and produce a decision about whether maintenance is required for that camera; the comparison involving the steps of: extracting salient features from both the probe and reference images to produce a processed probe image and a processed reference image; calculating a normalized matching factor, a shift factor and a defocus factor based on the processed probe image and processed reference image, wherein: the normalized matching factor represents the degree of match between the processed probe image and processed reference images, the shift factor reflects the amount of spatial deviation in 2-dimension needed to align the processed probe image with the processed reference image, and the defocus factor represents the amount of blurring of the processed probe image as compared to the processed reference image; and determining whether the normalized matching factor, shift factor and defocus factor satisfy one or more rules to compute the decision about whether maintenance is required for that camera.