الجمعة، 28 يناير 2022
Show HN: Faster R-CNN object detector implemented in PyTorch and TensorFlow 2 https://ift.tt/3gnoQYt
Show HN: Faster R-CNN object detector implemented in PyTorch and TensorFlow 2 Fresh and (I think) clean implementations of Faster R-CNN in PyTorch and TensorFlow 2/Keras. I wanted to learn about object detectors and decided to understand and implement a foundational model in the field, Faster R-CNN (elements of which are still used in modern models to this day), using the paper alone. That proved to be more difficult than expected and I had to relent and take a peak at existing implementations to fill in some important gaps. I've documented my struggles and learnings in the README for others to benefit from. I also wanted to solidify my understanding of TensorFlow/Keras and learn PyTorch, so I made sure to implement the model in both. Faster R-CNN is fairly challenging in that it doesn't quite map to Keras tutorial examples. For example, losses are not computed simply as a function of model output and input but rather, some of the training data is actually computed on-the-fly within the model during training and the losses have to explicitly be constructed as part of the graph. Personally, I found the "official" TensorFlow reference implementation ( https://ift.tt/3s2Oirg... ) to be very difficult to follow and I hope this proves to be useful to learners like myself. https://ift.tt/3G4bbzK January 28, 2022 at 10:19PM
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