Patent ID: 9111361
Filing Date: 2015-08-18
Classification: G06K,G06T

Abstract:
1. A method comprising: registering a first image and a second image in a sequence of images to a reference image in the sequence of images to form a first registered image and a second registered image, respectively; forming a double differenced image using the reference image, the first registered image, and the second registered image; and identifying a number of moving target signatures in the double differenced image, wherein a moving target signature in the number of moving target signatures comprises a spot of a first type and at least one spot of a second type adjacent to the spot of the first type; wherein the spot of the first type is a bright spot; wherein the at least one spot of the second type is a group of dark spots; wherein distance between the bright spot and the dark spots indicates a velocity of a moving target associated with the moving target signature; and wherein the group of dark spots comprises two dark spots located symmetrically around the bright spot.