A method of field detection in basketball broadcast video
A field and basketball technology, applied in the field of sports video analysis, can solve problems such as broken edge lines, holes that cannot be filled in field areas, and clustering into one.
Inactive Publication Date: 2015-08-19
CHINA DIGITAL VIDEO BEIJING
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Problems solved by technology
Because, in addition to the main color, there are other color areas and player areas, these areas will be included in the field extracted by the existing technology, so that the field area contains large or small holes that cannot be filled, and appear on the edge of the field It will cause the edge line to be broken (discontinuous), and if it is serious, it will cause the site to split and cannot be completely clustered into one. The obtained detection area result map can be referred to image 3
[0005] Therefore, a technical problem that currently needs those skilled in the art to solve urgently is: how to innovatively propose a method for field detection in basketball broadcast video, and solve the defect that the complete field area cannot be obtained in the detection of the prior art, so as to meet the practical application requirements
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[0040] refer to Figure 4 , showing a flow chart of a method for field detection in a basketball broadcast video of the present invention, the method specifically includes:
[0041] S101, acquire the obvious area mask M of the current frame image F ;
[0042] In sports video processing, the popular color spaces for field area extraction are hue-saturation (chroma-saturation) variables, such as HSI and HSV, and RGB. In the present invention, the strategy of combining two color spaces of RGB and HSI is adopted. Among them, RGB (also translated as "red, green and blue", which is relatively seldom used) is a color standard in the industry. They are superimposed on each other to get a variety of colors, RGB is the color representing the three channels of red, green, and blue; HSI [Hue-Saturation-Intensity (Lightness), HSI or HSL] color model uses H The three parameters of , S, and I describe the color characteristics, among which H defines the wavelength of the color, which is ...
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The invention provides a method for court detection in a basketball broadcast video. The method comprises the following steps: obtaining a mask MF of an obvious area of a present frame image; clustering the obtained the mask MF of the obvious area to form a court initial mask, that is a mask 0; carrying out a hough foul line detection on the formed court initial mask0 to extract an edge line of the court; carrying out a court fitting on the extracted edge line, determining a court position that the present frame image is located at and carrying out detection to obtain a line segment of a foul line; and according to the court position by determination and the line segment of the foul line by detection, determining a boundary intersecting point to obtain a court area. According to the invention, the obtained basketball court area is a complete court area, so that various practical applications including a competition tactics analysis, which depend on the basketball court detection, can be completed well.
Description
technical field [0001] The invention relates to the technical field of sports video analysis, in particular to a field detection method in a basketball broadcast video. Background technique [0002] In recent years, many researchers have devoted themselves to the research field of sports video analysis. Sports video analysis research mainly serves two major application directions: one is content-based video retrieval and summarization; the other is technical and tactical analysis and human motion analysis. The specific applications of the former include: semantic event labeling, highlight event extraction, structural analysis, etc. It is aimed at ordinary users and can effectively retrieve a long sports video; the latter is aimed at professional users, and its goal is to Help coaches formulate tactics and assist athletes in training. Ball and player trajectory extraction is very useful clues for technical and tactical analysis of sports videos. Stadium detection plays a v...
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IPC IPC(8): G06K9/00H04N5/14
Inventor 付萍刘剑秋
Owner CHINA DIGITAL VIDEO BEIJING