spatial transformer networks

encountered while reading “STN-OCR: A Single Neural Network for Text Detection and Text Recognition” which adopted spatial transformer networks.

This video is very clear in understanding how it works. Although I didn’t fully understand the interpolation equations, the other parts were clear. And at the end of the video, it briefly compares the spatial transformer with deformable convolutional networks which is interesting.

 

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darkflow yolo v2 training from scratch not working

Two single-class training attempts have been made where one successfully produced reliable bounding boxes and the other failed to produce even one. The successful case was a single-class ‘car’ detector and the other was a ‘face’ detector. The training results do not make sense and this post will document this erratic behavior. Continue reading “darkflow yolo v2 training from scratch not working”