Patent ID: 9519975
Filing Date: 2016-12-13
CPC Classification: G06F,G06T

Claim Text:
1. A method of determining an edge of an object in a digital image sequence of a view angle comprising: obtaining a first image from said digital image sequence and a second image from said digital image sequence; said object being presented in said second image; determining a first gradient direction profile of said first image in said digital image sequence; determining a second gradient direction profile of said second image in said digital image sequence; computing a differential profile based on said first gradient direction profile and said second gradient direction profile; and determining said edge of said object based on said differential profile, wherein said differential profile registers gradient magnitudes of said second gradient direction profile and angular differences between said first gradient direction profile and said second gradient direction profile, wherein said differential profile includes absolute values of a product of said gradient magnitudes of said second gradient direction profile and sine values of said angular differences between said first gradient direction profile and said second gradient direction profile.