Patent ID: 9025826
Filing Date: 2015-05-05
Classification: G06T

Abstract:
1. A method of forming a time-varying signal representative of at least variations in a value based on pixel values from a sequence of images, the signal corresponding in length to the sequence of images, the method comprising acts of: receiving the sequence of images; forming a plurality of groups of sub-sets of pixel values by selecting a sub-set of at least one pixel value from each of at least two images defining an interval to form a group of associated sub-sets using at least one of a different aperture and a different interval length for groups defined on different intervals of the sequence; and selecting groups of sub-sets to form the signal to cover different intervals of the sequence of images by obtaining spatio-temporal volumes of pixel values from a sequence of images at least based on the received sequence of images, each volume comprising pixel values within a spatial aperture from each image within an interval of the sequence.