A very nice presentation (as always) of CornerNet by Yannic Kilcher. The key ideas are push-pull losses of corner embeddings and corner pooling. The ideas are simple and intuitive but very well excecuted. The authors have include ablation study for the gain of corner pooling. Their result is competitive with other 1 stage approach, better than YoloV3 but worse than YoloV4. And they also tested that when ground truth corner detections were used, their AP almost doubles. This illustrated that corner detection is their main bottleneck.

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