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A feature point-based plane tracking method and system

A feature point and plane technology, applied in the field of plane tracking, can solve problems such as object shaking, affecting robustness, difficulty in obtaining homography matrix, etc., to achieve the effect of reducing offset error and enhancing stability

Active Publication Date: 2022-07-12
GAODING XIAMEN TECH CO LTD +1
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Problems solved by technology

[0003] However, in the process of retrieving the tracking target, it is often encountered in the case of shaking, deformation, discoloration, etc. of the object in the plane, and it is difficult to obtain an accurate homography matrix, so that a stable tracking effect cannot be obtained, which affects its robustness

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  • A feature point-based plane tracking method and system
  • A feature point-based plane tracking method and system
  • A feature point-based plane tracking method and system

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Embodiment Construction

[0050] In order to facilitate the understanding of those skilled in the art, the structure of the present invention will be further described in detail with reference to the accompanying drawings:

[0051] refer to figure 1 , a feature point-based plane tracking method, including the following steps:

[0052] S1, a video acquisition step: acquiring an initial video file, and specifying a specific key frame image of the initial video file as an initial frame;

[0053] S2, the step of acquiring corner points: acquiring the target area to be tracked in the initial frame, cutting out the effective area, and extracting the corner points of the effective area. The target area to be tracked is an area selected by the user.

[0054] figure 2is the initial frame that this method needs to track. This method selects the upper half-life area of ​​the girl in the video as the plane to be tracked. In order to eliminate the interference of the background area, we only crop out the images...

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Abstract

The invention relates to a feature point-based plane tracking method and a system thereof, comprising the following steps: obtaining an initial video file; a corner point obtaining step: obtaining a target area to be tracked in an initial frame, cutting out an effective area, and extracting the effective area Corner point; Screening step: associate the corner point of the effective area in the i-1th frame image with the corresponding corner point in the i-th frame as a corner point pair, and filter the qualified corner point pair, which is defined as the final Matching point pairs, calculating the final homography matrix through the final matching point pairs; optimization step: calculating the cross-correlation matching value of the corresponding extended image block in the i-th frame image through the image algorithm, and defining the pixel with the largest cross-correlation matching value The coordinates are the coordinates tracked by the plane.

Description

technical field [0001] The invention relates to the field of plane tracking, in particular to a feature point-based plane tracking method and system. Background technique [0002] Plane-based visual tracking, referred to as plane tracking. When plane tracking is performed in a video, because the target area moves too fast between video frames, the tracking may fail, and the tracking target needs to be retrieved in time. [0003] However, in the process of retrieving the tracking target, the objects in the plane are often jittered, deformed, discolored, etc., and it is difficult to obtain an accurate homography matrix, so that a stable tracking effect cannot be obtained, which affects its robustness. [0004] Aiming at the above problems in the prior art, it is the purpose of the present invention to design a feature point-based plane tracking method and system. SUMMARY OF THE INVENTION [0005] Aiming at the problems existing in the above-mentioned prior art, the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/246G06T7/215
CPCG06T7/248G06T7/215G06T2207/10016
Inventor 曾锐林汉权林杰兴
Owner GAODING XIAMEN TECH CO LTD
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