Comments (2)
1.We didn't test other well-known segmentation models for crowd localization. The two segmentation models (HRNet and VGG+FPN) adapted in the paper have been able to demonstrate that the segmentation method can be exploited to locate the crowd. Besides, this paper's model is slightly different from the traditional segmentation models, even though they both use the mask. In fact, this paper focuses on regressing the coarse confidence map and then do further research (e.g., IBM/PBM) to binarize the confidence map into the segmentation map. We believe other well-performance segmentation models can improve the confidence map's quality and produce more accurate localization results, but the current work does not aim to discuss it. It is just a submodule of our approach.
In the future, we may utilize some mainstream segmentation networks to further improve performance, such as Deeplab and so on.
2.This is an interesting phenomenon. According to our experiment, the results on the validation set are F1_0.748, Pre_0.874, Rec_0.654,mae_146.3, and mse_672.6 under the threshold of 0.3. The localization performance is better, but the counting performance gets worse. The reason is that lower thresholds cannot binarize the confidence map well in some glued regions, seriously affecting the counting effect in some scenarios.
3. Due to the limited time and resources, we did not do relevant experiments on the segmentation task. We believe that the proposed scheme could be suitable for other segmentation tasks.
Thanks for your attention!
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Thank you for your patience!
Looking forward to your future work!
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