Variable shelter template matching algorithm of video target tracking

A technology for template matching and target tracking, which is used in computing, computer parts, character and pattern recognition, etc.

Inactive Publication Date: 2008-08-20
FUDAN UNIV
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  • Variable shelter template matching algorithm of video target tracking
  • Variable shelter template matching algorithm of video target tracking
  • Variable shelter template matching algorithm of video target tracking

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Experimental program
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Embodiment Construction

[0031] In the specific implementation of the present invention, the tracking algorithm proposed in [11] is used as the basis, and the tracking performance before and after adding the variable masking template matching algorithm proposed in the present invention is compared.

[0032] We first make the above comparisons on a large number of real-world video streams. These real-world video streams contain different kinds of objects as well as various occluded scenes, moreover, the motion of the camera is arbitrary. We divide the occlusion scenarios of the 30 test video streams into two types: short-term occlusion and long-term occlusion. If an occlusion lasts longer than 25 frames, it is considered a long-term occlusion. The experimental results are shown in Table 1.

[0033] Table 1

[0034] Occlusion type

Literature [11]

this invention

short term (15)

14

15

Long term (15)

13

14

total(30)

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Abstract

The invention specifically relates to a variable masking template matching algorithm in video target tracking which belongs to the field of computer vision and pattern recognition technology. In video target tracking, the target is obscured often by other object partly. In such circumstances, using the traditional fixed masking template matching to determine target location will cause accuracy decreased significantly. In order to realize target location accurately under a condition that the target is obscured partly, the invention combines with block analysis technology, on the basis of the first non-exact match result using variable masking template matching algorithm to do correction, the template masking in the process of correction changes dynamically as the change of candidate target location, thus causing non-masking part of the target always can guide the matching algorithm effectively to find precise target location. Confirms effectiveness of the invention algorithm based on experimental result of real video streaming.

Description

technical field [0001] The invention belongs to the technical field of computer vision and pattern analysis, in particular to a variable masking template matching algorithm in video target tracking. Background technique [0002] Object tracking has a wide range of applications in human-computer interaction, automatic surveillance, video retrieval, traffic monitoring, and vehicle navigation. The task of object tracking is to determine the geometric state of the object in each frame of the video stream, including position, size, and orientation. Since the appearance of the tracked target is not limited, and the appearance of the target can change during the tracking process, coupled with the interference of complex foreground and background, the target tracking algorithm faces many challenges, and it is one of the research hotspots in the field of computer vision. [0003] Target tracking algorithms can be divided into three categories, one is point tracking [1，2] , the seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46G06T7/00G06T7/20
Inventor 潘吉彦胡波张建秋
Owner FUDAN UNIV
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