FCN Faster_RCNN + OCR

10/25/18 This PyTorch implementation currently supports text detection by Faster-RCNN and OCR by CRNN in two seperate models.

Please refer to ruotianluo's Faster-RCNN implementation, and meijieru's CRNN implementation. Baidu's Warp-ctc is also relied for the translation.

• A basic pytorch installation. The code follows 0.4.
• Python packages you might not have: cffi, opencv-python, easydict (similar to py-faster-rcnn). For easydict make sure you have the right version. Xinlei uses 1.6.
• tensorboard-pytorch to visualize the training and validation curve. Please build from source to use the latest tensorflow-tensorboard.

Please follow the instructions of py-faster-rcnn here to setup VOC and COCO datasets (Part of COCO is done). The steps involve downloading data and optionally creating soft links in the data folder. Since faster RCNN does not rely on pre-computed proposals, it is safe to ignore the steps that setup proposals.

full_text dataset is customized to have an additional ground truth dict "gt_text" similar to bounding boxes, you can follow the same metrics of VOC to customize your data.

1. Download pre-trained models and weights. The current code support VGG16 and Resnet V1 models. Pre-trained models are provided by pytorch-vgg and pytorch-resnet (the ones with caffe in the name), you can download the pre-trained models and set them in the data/imagenet_weights folder. For example for VGG16 model, you can set up like:

   mkdir -p data/imagenet_weights
   cd data/imagenet_weights
   python # open python in terminal and run the following Python code

   import torch
   from torch.utils.model_zoo import load_url
   from torchvision import models
   
   sd = load_url("https://s3-us-west-2.amazonaws.com/jcjohns-models/vgg16-00b39a1b.pth")
   sd['classifier.0.weight'] = sd['classifier.1.weight']
   sd['classifier.0.bias'] = sd['classifier.1.bias']
   del sd['classifier.1.weight']
   del sd['classifier.1.bias']
   
   sd['classifier.3.weight'] = sd['classifier.4.weight']
   sd['classifier.3.bias'] = sd['classifier.4.bias']
   del sd['classifier.4.weight']
   del sd['classifier.4.bias']
   
   torch.save(sd, "vgg16.pth")

   cd ../..

   For Resnet101, you can set up like:

   mkdir -p data/imagenet_weights
   cd data/imagenet_weights
   # download from my gdrive (link in pytorch-resnet)
   mv resnet101-caffe.pth res101.pth
   cd ../..

   For Mobilenet V1, you can set up like:

   mkdir -p data/imagenet_weights
   cd data/imagenet_weights
   # download from my gdrive (https://drive.google.com/open?id=0B7fNdx_jAqhtZGJvZlpVeDhUN1k)
   mv mobilenet_v1_1.0_224.pth.pth mobile.pth
   cd ../..

2. Train (and test, evaluation)

./experiments/scripts/train_faster_rcnn.sh [GPU_ID] [DATASET] [NET]
# GPU_ID is the GPU you want to test on
# NET in {vgg16, res50, res101, res152} is the network arch to use
# DATASET {pascal_voc, pascal_voc_0712, coco} is defined in train_faster_rcnn.sh
# Examples:
./experiments/scripts/train_faster_rcnn.sh 0 pascal_voc vgg16
./experiments/scripts/train_faster_rcnn.sh 1 coco res101

TBA