Patent ID: RE38908

Claim:
A method for notifying at least one security post of an undesired condition at a monitored area, the method including the steps of comprising : A. creating a first image of said monitored area at a first time point, said first image divided into a plurality of first image blocks using a predefined predetermined grid; B. creating a second image of said monitored area at a second time point, said second image divided into a plurality of second image blocks using said predetermined grid so that each of the second image blocks corresponds to a respective one of the first image blocks ; C. comparing a said performing a comparison of each of at least one of said plurality of first image block blocks with a the corresponding said second image block by performing the steps of calculating a first average pixel value of said that first image block; calculating a second average pixel value of said corresponding second image block; calculating a first standard deviation pixel value of said that first image block; calculating a second standard deviation pixel value of said corresponding second image block; calculating a first x-coordinate pixel massive center of said that first image block; calculating a second x-coordinate pixel massive center of said corresponding second image block; calculating a first y-coordinate pixel massive center of said that first image block; and calculating a second y-coordinate pixel massive center of said corresponding second image block; and D. sending a fax of said second image to said at least one security post making a determination in response to the comparison that the first image is sufficiently different from the second image if, for each first image block of at least a predetermined number thereof thereby compared , said corresponding second image block is substantially different from said first image block, wherein said first image block is substantially different from said corresponding second image block if said the first average pixel value calculated therefor is substantially sufficiently different from said the corresponding second average pixel value or if said the first standard deviation pixel value calculated therefor is substantially sufficiently different from said the corresponding second standard deviation pixel value or if said the first x-coordinate pixel massive center calculated therefor is substantially sufficiently different from said the corresponding second x-coordinate pixel massive center or if said the first y-coordinate pixel massive center calculated therefor is substantially sufficiently different from said the corresponding second ycoordinate y- coordinate pixel massive center ; and E. sending signals representing the second image to the at least one security post in response to the comparison if the first image is thereby determined to be sufficiently different from the second image .