Patent ID: 6493042
Filing Date: 2002-12-10
Classification: H04N

Abstract:
A video segmentation system that detects gradual changes between discontinuous cuts, comprising:a histogram determiner that determines a histogram of at least two frames between a pair of discontinuous cuts of a video segment; a variance determiner that determines a variance between the at least two frames; and a segment identifier that identifies a gradual change based on the variance between the at least two frames, wherein the histogram is determined from an intensity of the at least two frames and the intensity E(x,y,t) at time (t) is: E(x,y,t)=I(x,y,t1)&agr;(t)+I(x,y,t2)[1âˆ’&agr;(t)], whereI(x,y,t1) is the intensity of a pixel at the spatial location (x,y) in the frame occurring at time (t); I(x,y,t1)=0 in the case of fade-in; I(x,y,t2)=0 in the case of a fade-out; t1and t2 are the starting and ending points of the video segment; and &agr;(t) is a video image data signal value intensity function based on the temporal location of a frame within the gradual change.