Real-time CNN-based Segmentation Architecture for Ball Detection in a Single View Setup

23 Jul 2020  ·  Gabriel Van Zandycke, Christophe De Vleeschouwer ·

This paper considers the task of detecting the ball from a single viewpoint in the challenging but common case where the ball interacts frequently with players while being poorly contrasted with respect to the background. We propose a novel approach by formulating the problem as a segmentation task solved by an efficient CNN architecture. To take advantage of the ball dynamics, the network is fed with a pair of consecutive images. Our inference model can run in real time without the delay induced by a temporal analysis. We also show that test-time data augmentation allows for a significant increase the detection accuracy. As an additional contribution, we publicly release the dataset on which this work is based.

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Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Sports Ball Detection and Tracking Badminton BallSeg F1 (%) 79.9 # 6
Accuracy (%) 72.2 # 6
Average Precision (%) 68.4 # 6
Sports Ball Detection and Tracking Basketball BallSeg F1 (%) 16.8 # 7
Accuracy (%) 20.5 # 7
Average Precision (%) 5.3 # 7
Sports Ball Detection and Tracking Soccer BallSeg F1 (%) 36.1 # 8
Average Precision (%) 20.0 # 8
Accuracy (% ) 92.6 # 7
Sports Ball Detection and Tracking Tennis BallSeg F1 (%) 71.7 # 6
Accuracy (%) 57.5 # 6
Average Precision (%) 56.8 # 6
Sports Ball Detection and Tracking Volleyball BallSeg F1 (%) 19.5 # 8
Accuracy (%) 17.5 # 8
Average Precision (%) 8.5 # 8

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