Scene change detection system and method
First Claim
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1. A system for detecting scene changes in a sequence of video image comprising:
- a video signal source; and
a computer coupled to the video input source for analyzing the video sequence, comprising;
quantizer coupled to the video signal source for converting the video signal to a digital representation;
a frame buffer coupled to the quantizer for storing the digital representations of the video signal;
an image processor for analyzing the digital representations of the video signal to determine where scenes change;
a digital video random access connection between the frame buffer and the image processor for transmitting the digitized video frames; and
an application interface coupled to the image processor;
wherein said image processor comprises;
(i) a detection zone assignment generator for designating zones which are to be used to detect a scene change;
(j) a feature change calculator coupled to the detection zone assignment generator for determining frame-to-frame feature changes within each detection zone; and
(k) a scene change decision module coupled to the feature change calculator for deciding whether the feature changes within the detection zones meets a predetermined decision criteria indicating a scene change.
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Abstract
A system detects scene changes in a sequence of video images by analyzing the sequence for abrupt frame-to-frame changes in certain image features. The system accepts the signal into a quantizer, which digitizes the image, and stores it into a frame buffer. An image processor, a component of the system, analyzes the digitized images, and determines certain features which a decision processor can use to detect a scene change.
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Citations
33 Claims
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1. A system for detecting scene changes in a sequence of video image comprising:
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a video signal source; and a computer coupled to the video input source for analyzing the video sequence, comprising; quantizer coupled to the video signal source for converting the video signal to a digital representation; a frame buffer coupled to the quantizer for storing the digital representations of the video signal; an image processor for analyzing the digital representations of the video signal to determine where scenes change; a digital video random access connection between the frame buffer and the image processor for transmitting the digitized video frames; and an application interface coupled to the image processor; wherein said image processor comprises; (i) a detection zone assignment generator for designating zones which are to be used to detect a scene change; (j) a feature change calculator coupled to the detection zone assignment generator for determining frame-to-frame feature changes within each detection zone; and (k) a scene change decision module coupled to the feature change calculator for deciding whether the feature changes within the detection zones meets a predetermined decision criteria indicating a scene change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12, 13)
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14. A method for detecting scene changes in a video sequence, comprising the steps of:
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(a) digitizing a video frame; (b) detecting objects int he digitized video frame; (c) computing features for the objects detected in step (b); (d) determining a frame-to-frame difference in said features; and (e) indicating a scene change when said determined differences meet a certain decision criteria. - View Dependent Claims (15, 16, 17, 18)
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19. A system for detecting scene changes in a sequence of video image comprising:
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a video signal source; and a computer coupled to the video input source for analyzing the video sequence, comprising; quantizer coupled to the video signal source for converting the video signal to a digital representation; a frame buffer coupled to the quantizer for storing the digital representations of the video signal; an image processor for analyzing the digital representations of the video signal to determine where scenes change; a digital video random access connection between the frame buffer and the image processor for transmitting the digitized video frames; and an application interface coupled to the image processor; wherein said image processor comprises; an object detection module for separating an image into discrete objects and for labeling those objects; and a scene change detection module coupled to the object detection module for detecting a scene change based on a decision criteria. - View Dependent Claims (9, 10, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification