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Method and device for detecting and tracking barbell central point
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A center point and barbell technology, which is applied in the field of barbell center point detection and tracking, can solve the problems of incoherent images, poor image continuity, and affecting the audience's viewing effect, and achieve the effect of suppressing tracking errors
Inactive Publication Date: 2012-11-28
BEIJING UNIV OF TECH
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Modifying the exposure time of the camera can correct the smearing phenomenon of recorded images, but doing so will seriously affect the viewing effect of the weightlifting audience, because shortening the exposure time can remove the smearing phenomenon, but it leads to image continuity A bad shortcoming, it will make the audience feel that the image is always incoherent, jumping and jumping, so this will not work
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Embodiment 1
[0072] Embodiment 1, a method for barbell center point detection and tracking, comprising two major steps:
[0073] A. Perform barbell segmentation on the first image frame in the input video, that is, detect (extract) the center point of the barbell in each image frame. In this paper, the barbell in the image frame refers to the bell plate facing the end of the camera. , The center point of the barbell mentioned in this article refers to the center of the weight plate at the end of the barbell facing the camera.
[0074] In order to accurately locate the center point of the barbell, the step A specifically includes:
[0075] input video; the video is a plurality of continuous image frames;
[0076] Perform the following steps on the first image frame in the video:
[0077] Roughly locate the barbell first to remove most of the background noise;
[0078] Then, according to the result of the rough positioning, the Hough transform of the limited area is performed to determine...
Embodiment 2
[0192] Embodiment 2, a device for barbell center point detection and tracking, comprising:
[0193] The image input module is used to receive the input video, that is, several consecutive image frames;
[0194] a detection module for detecting the center point of the barbell in the first image frame in the video;
[0195] A tracking module, configured to track the center point of the barbell in each image frame in the video.
[0196] In this embodiment, the detection module specifically includes:
[0197] The coarse segmentation sub-module is used to perform color segmentation on the first image frame according to the preset color, and output the parts that meet the conditions;
[0198] The region determination sub-module is used to perform morphological processing on the image output by the coarse segmentation sub-module to remove some noise points; and use constraints such as aspect ratio and area size to determine the approximate location area of the barbell;
[0199] ...
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Abstract
The invention relates to a method and device for detecting and tracking a barbell central point. The method comprises the following steps of: extracting a barbell central point in a first image frame; making a rhombic matrix for all image frames on the basis of the barbell central point, recording the position of each matrix point and setting the weight of each matrix point; carrying out LK pyramid optical-flow method tracking on a central point of the rhombic matrix in every adjacent two image frames to obtain a tracking point and carrying out optical-flow method tracking on the rest multiple matrix dots to obtain respective tracking points; removing the wrong tracking point and removing a tracking point symmetric to the tracking point with respect to a rhombic central point; and averaging the weight of all the tracking points after adding to obtain a smooth tracking vector of the barbell central point and confirming the tracked barbell central point, wherein the weight of all the tracking points is the weight of the corresponding matrix dots. The method provided by the invention can realize the detection and tracking of the barbell central point and effectively inhibit a tracking error brought by a trailing phenomenon.
Description
technical field [0001] The invention relates to the field of video processing, in particular to a method and device for detecting and tracking a barbell center point. Background technique [0002] In the field of sports analysis, athletes usually increase the amount of training in order to improve the performance of the game, and inappropriately increasing the training intensity will often cause harm to the athletes. Therefore, it is necessary to study a scientific and quantitative sports training system. [0003] Weightlifting is a traditional sport in my country and has won 24 Olympic gold medals so far. The quality of weightlifting diagnosis technology directly determines the final competition results of athletes. Therefore, whether to provide an effective and practical means of rapid diagnosis of sports technology for athletes and coaches is an urgent problem to be solved in the current weightlifting scientific research. In the past, weightlifting technique diagnosis wa...
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