MOVING OBJECT DETECTION METHOD AND MOVING OBJECT DETECTION APPARATUS
First Claim
1. A moving object detection method for detecting a moving object in video by performing segmentation on all or part of the moving object in the video, said moving object detection method comprising:
- extracting NL long-term trajectories (NL≧
2) and NS short-term trajectories (NS>
NL) using movement trajectories each of which includes corresponding points over two or more pictures included in the video, the long-term trajectories being movement trajectories over TL pictures (TL≧
3), the short-term trajectories being movement trajectories over TS pictures (TL>
TS≧
2) included in the TL pictures;
calculating a geodetic distance between the NL long-term trajectories and a geodetic distance between the NS short-term trajectories;
calculating an approximate geodetic distance that is a geodetic distance between NS movement trajectories over the TL pictures, based on the geodetic distance between the long-term trajectories and the geodetic distance between the short-term trajectories calculated in said calculating of a geodetic distance; and
performing segmentation by segmenting a group of the movement trajectories as a single region, based on the approximate geodetic distance calculated in said calculating of an approximate geodetic distance.
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Abstract
A moving object detection method includes: extracting NL long-term trajectories (NL≧2) over TL pictures (TL≧3) and NS short-term trajectories (NS>NL) over TS pictures (TL>TS≧2), using movement trajectories; calculating a geodetic distance between the NL long-term trajectories and a geodetic distance between the NS short-term trajectories (S205); calculating an approximate geodetic distance that is a geodetic distance between the NS movement trajectories over the TL pictures, based on the calculated geodetic distance between the long-term trajectories and geodetic distance between the short-term trajectories (S206); and performing segmentation based on the calculated approximate geodetic distance (S207).
25 Citations
17 Claims
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1. A moving object detection method for detecting a moving object in video by performing segmentation on all or part of the moving object in the video, said moving object detection method comprising:
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extracting NL long-term trajectories (NL≧
2) and NS short-term trajectories (NS>
NL) using movement trajectories each of which includes corresponding points over two or more pictures included in the video, the long-term trajectories being movement trajectories over TL pictures (TL≧
3), the short-term trajectories being movement trajectories over TS pictures (TL>
TS≧
2) included in the TL pictures;
calculating a geodetic distance between the NL long-term trajectories and a geodetic distance between the NS short-term trajectories;calculating an approximate geodetic distance that is a geodetic distance between NS movement trajectories over the TL pictures, based on the geodetic distance between the long-term trajectories and the geodetic distance between the short-term trajectories calculated in said calculating of a geodetic distance; and performing segmentation by segmenting a group of the movement trajectories as a single region, based on the approximate geodetic distance calculated in said calculating of an approximate geodetic distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17)
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16. A moving object detection apparatus which detects a moving object in video by performing segmentation on all or part of the moving object in the video, said moving object detection apparatus comprising:
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a distance calculating unit configured to extract NL long-term trajectories (NL≧
2) and NS short-term trajectories (NS>
NL) using movement trajectories each of which includes corresponding points over two or more pictures included in the video, and to calculate a geodetic distance between the NL long-term trajectories and a geodetic distance between the NS short-term trajectories, the long-term trajectories being movement trajectories over TL pictures (TL≧
3), the short-term trajectories being movement trajectories over TS pictures (TL>
TS≧
2) included in the TL pictures;a distance interpolation unit configured to calculate an approximate geodetic distance that is a geodetic distance between NS movement trajectories over TL pictures based on the geodetic distance between the long-term trajectories and the geodetic distance between short-term trajectories calculated by said distance calculating unit; and a segmentation unit configured to perform segmentation by segmenting a group of the movement trajectories as a single region based on the approximate geodetic distance calculated by said distance interpolation unit.
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Specification