Apparatus and method for detection of scene changes in motion video
AssigneeMoonlight Cordless Ltd.
InventorsNitzan Rabinowitz, Evgeny Landa, Andrey Posdnyakov, Ira Dvir
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Abstract
Apparatus and method for new scene detection in a sequence of video frames, comprising: a frame selector for selecting a current frame and one or more following frames; a down sampler, associated with the frame selector, to down sample the selected frames; a distance evaluator to find a statistical distance between the down sampled frames; and a decision maker for evaluating the statistical distance to determine therefrom whether a scene transition has occurred or not.
Claims49
Apparatus for new scene detection in a sequence of frames, comprising:
- a. a frame selector for selecting at least a current frame and a following frame;
- b. a frame reducer, associated with said frame selector, for producing downsampled versions of said selected frames;
- c. a distance evaluator, associated with said down sampler, for evaluating a distance between respective ones of said down sampled frame versions;
- and
- d. a decision maker, associated with said distance evaluator, for using said evaluated distance to decide whether said selected frames include a scene change.
a) calculating a resultant absolute difference frame of pixel gray levels between said down sampled frames,
- b) summating over the pixels in said absolute difference frame, gray levels of respective pixels multiplied by the natural log thereof, and
- c) normalizing said summation.
A method of new scene detection in a sequence of frames comprising the steps of:
- a. observing a current frame and at least one following frame;
- b. applying a reduction to said observed frames to produce respective reduced frames;
- c. applying a distance metric to evaluate a distance between said respective reduced frames;
- and
- d. evaluating said distance metric to determine whether a scene change has occurred between said current frame and said following frame.
Dependencies are inferred from the claim text.