Scene change detection system and method
AssigneeTexas Instruments Incorporated
InventorRobert J. Gove
Life of this patent
Estimating the term…
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.
Claims33
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.
The system in claim 24, wherein the computer analyzes a subset of the video images int eh sequence by sampling at an interval.
The system in claim 24, wherein the rate at which the video signal source produces images is reduced to the rate at which the computer system is able to analyze the sequence.
A method for detecting scene changes in a video sequence, comprising the steps of:
- (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.
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:
- 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.
Dependencies are inferred from the claim text.