System for moving object detection in moving picture
First Claim
1. A system for detecting a moving object in a moving picture by decoding a compressed data of an input moving picture and by adding moving object information to the decoded picture data, comprising:
- compressed picture information extraction means for partially decoding the compressed data of a moving picture input for each block and extracting the picture information constituting a part of the data from said partially decoded data;
adaptive detection scheme selection means for classifying the moving object detecting by a coding mode for each frame and a motion compensation mode for each block obtained by said compressed picture information extraction means;
moving object detection prediction means for estimating the presence or absence of a moving object in a block using a motion vector of a spatio-temporally adjacent block selected by the adaptive detection scheme selection means in the case where said block is an intra-coded block and for outputting the moving object information; and
basic moving object detection means for not detecting said block as a moving object area when the size of a motion vector of said block obtained from said compressed picture information extraction means is at least lower than a threshold level selected by the adaptive detection scheme selection means in the case where said block is not an intra-coded block and for outputting the moving object information.
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Accused Products
Abstract
A system for detecting a moving object in a moving picture, which can detect a moving object by block directly with a highly-accurate, simple process without completely decoding the compressed moving picture data. The picture block coding mode, the motion compensation mode and the motion vector information (information b) decoded in a variable-length decoder 1 and the texture information d detected by a texture information detector 7 are applied to a moving object detection processor 8. The moving object detection processor 8 judges whether the particular block is a moving object or not using the information b or the combined information b and the texture information d. This judgement is effected by a motion vector, a spatial similarity judgement and a temporal similarity judgement. The moving object detection information e resulting from the judgement is sent to a picture image processor 5 for processing the picture information f. A picture display unit 10 can display a non-moving object and a moving object with different brightness and in different colors.
47 Citations
11 Claims
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1. A system for detecting a moving object in a moving picture by decoding a compressed data of an input moving picture and by adding moving object information to the decoded picture data, comprising:
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compressed picture information extraction means for partially decoding the compressed data of a moving picture input for each block and extracting the picture information constituting a part of the data from said partially decoded data; adaptive detection scheme selection means for classifying the moving object detecting by a coding mode for each frame and a motion compensation mode for each block obtained by said compressed picture information extraction means; moving object detection prediction means for estimating the presence or absence of a moving object in a block using a motion vector of a spatio-temporally adjacent block selected by the adaptive detection scheme selection means in the case where said block is an intra-coded block and for outputting the moving object information; and basic moving object detection means for not detecting said block as a moving object area when the size of a motion vector of said block obtained from said compressed picture information extraction means is at least lower than a threshold level selected by the adaptive detection scheme selection means in the case where said block is not an intra-coded block and for outputting the moving object information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification