A High Accuracy Camera Calibration Method for Sport Videos

Camera calibration for sport videos enables precise and natural delivery of graphics on video footage and several other special effects. This in turns substantially improves the visual experience in the audience and facilitates sports analysis within or after the live show. In this paper, we propose...

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Bibliographic Details
Main Authors: Zhang, Neng, Izquierdo, Ebroul
Format: Conference Proceeding
Language:English
Subjects:
camera calibration
Cameras
Feature extraction
homography
Image segmentation
semantic segmentation
Semantics
sport videos
Visual communication
Visualization
Online Access:Request full text
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Summary:Camera calibration for sport videos enables precise and natural delivery of graphics on video footage and several other special effects. This in turns substantially improves the visual experience in the audience and facilitates sports analysis within or after the live show. In this paper, we propose a high accuracy camera calibration method for sport videos. First, we generate a homography database by uniformly sampling camera parameters. This database includes more than 91 thousand different homography matrices. Then, we use the conditional generative adversarial network (cGAN) to achieve semantic segmentation splitting the broadcast frames into four classes. In a subsequent processing step, we build an effective feature extraction network to extract the feature of semantic segmented images. After that, we search for the feature in the database to find the best matching homography. Finally, we refine the homography by image alignment. In a comprehensive evaluation using the 2014 World Cup dataset, our method outperforms other state-of-the-art techniques.
ISSN:2642-9357
DOI:10.1109/VCIP53242.2021.9675379