Fast RCNN
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Fast R-CNN
그냥 R-CNN은 이런가봄 : R-CNN first finetunes a ConvNet on object proposals using log loss. Then, it fits SVMs to ConvNet features. These SVMs act as object detectors, replacing the softmax classifier learnt by fine-tuning. In the third training stage, bounding-box regressors are learned. … Detection with VGG16 takes 47s / image (on a Nvidia K40 GPU overclocked to 875 MHz.). 이야 ~
그냥 R-CNN은 object proposal마다 cnn forward하는데, SPPnets[1]가 미리 cnn돌려놓고 거기서부터 feature뽑아내는 식으로 test time은 10~100배, training time도 3배정도 개선했다.
- ↑ K.He, X.Zhang, S.Ren, and J.Sun. Spatial pyramid pooling in deep convolutional networks for visual recognition. In ECCV,2014.