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tianzhi0549 / FCOS

FCOS: Fully Convolutional One-Stage Object Detection (ICCV'19)
https://arxiv.org/abs/1904.01355
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Does FCOS handle two crossing objects with same center, same size, but only different orientation? #251

Closed wuyuanyi135 closed 4 years ago

wuyuanyi135 commented 4 years ago

Hello, Thanks for the great work! I wonder if anybody has experience whether this model can handle two crossing objects with same center, same size, but only different orientation (see the image below).

IMG_0136

In an anchor-based network, this problem can be solved by the anchor boxes with different aspect ratios. In FCOS, is this problem causing missed detection?

Thank you!

tianzhi0549 commented 4 years ago

@wuyuanyi135 it is indeed a problem of the anchor-free detector. You might handle the case by the idea in "Matrix Nets: A New Deep Architecture for Object Detection".

wuyuanyi135 commented 4 years ago

@tianzhi0549 Thanks for confirming this and your recommendation!

tianzhi0549 commented 4 years ago

@wuyuanyi135 by the way, this does not imply that FCOS will fail to detect the two objects because there are many other locations in non-overlapped regions, which can be used to detect the box.

wuyuanyi135 commented 4 years ago

@tianzhi0549 Understood. I will report back after I use it on my dataset. Thanks!