## paper summary: “VarifocalNet: An IoU-aware Dense Object Detector”(VFNet)

arxiv: https://arxiv.org/abs/2008.13367 key points another anchor-free point based object detection network introduce new loss, varifocal loss which is a forked version from focal loss. Makes some changes from focal loss to compensate positive/negative imbalance futher. instead of prediction classification and IOU score separately, this work predicts a single scalar which Read more…

## Focal Loss (a.k.a RetinaNet) paper review

I have heard so much about Retinanet in the realm of object detection and recently I had the chance to read the paper. Surprisingly, the paper is titled with “focal loss” and not “RetinaNet”. The most important lesson that I learned here was that it was the “focal loss” that was Read more…