SRGAN

This is implementation of SRGAN under working.

Currently only generator part is implemented. SRResNet is implemented but not benchmarked yet. SRGAN is hopefully implementation soon. I can't reproduce PSNR of bicubic in the paper, thus haven't measured the PSNR.

The paper is Photo-Realistic Single Image Super-Resolution Using a Generative Adversarial Network.

These images are generated from LR images into 4x SR with trained with with the code. Check 23K results

There more experiments going on. For ex, using preactivation ResNet, 4x4 deconvolution layer to remove artifacts.

This repository started from altering Torch7-Network Profiler. Used ResNet but changed a lot from original. Final using model is models/resnet-deconv2.lua. The model trained uses 9x9 conv for first and last Conv layers and 15 residual blocks.

LR Patch is 3x24x24 and SR Patch is 3x96x96. It was vague in the paper that 96x96x is either LR or SR but LR96 was untrainable because of not enough memory (GTX1080).

Trained with ImageNet (50 images from 1000 classes that have 3 channel and bigger than 3x288x288). For first time, just uncomment prepImageNet to have paths to images. Save it as imgBatch.t7 After then, comment these as original code and load it.

Only supports, cuda/cudnn backend.

To profile network,

th profile-model.lua -m models/resnet-deconv2.lua -r 16x3x24x24 -p cuda

To train network,

First, parse ImageNet dataset. Manually set datasetPath variable as your ImageNet path. The path is expected to have 1000 sub category folders.

th prepImageNet.lua

Then, start train with

th train-SRResNet.lua -model_name 9x9-15res-LR24 It will save checkpoints in model_name directory.

To resume training,

th train-SRResNet.lua -model_name 9x9-15res-LR24 -checkpoint_start_from models/9x9-15res-LR24/230000.t7

To run/test model,

th run-SRResNet.lua -checkpoint_path models/9x9-15res-LR24/230000.t7 -dataset BSD100 -result_path results_23K

-dataset can be BSD100|Set5|Set14.

If memory is not big enough, will print 'oom' and move on.

Model weight

For those who need weight, download this weight in your

./checkpoints/9x9-15res-LR24 : 700K iter ./checkpoints/VGGloss-4x4deconv : [24K iter](: https://www.dropbox.com/s/ngru09rhfjzfos0/24000.t7?dl=0)

Currently Doing

1. I've tried training in preactviation resnet and removing artifacts by deconv. So far, analyzing what are pros and cons.

2. ContentLoss. Inlcuded VGG/saveVGG19.sh to build VGG loss.

• luarocks install loadcaffe
• Download VGG : cd VGG; ./saveVGG19
• luarocks install https://raw.githubusercontent.com/szym/display/master/display-scm-0.rockspec
  • Install display: a browser-based graphics server
• th -ldisplay.start 8000 0.0.0.0
• th train-SRResNet-VGGloss.lua -arch models/resnet-4x4deconv-preact.lua -model_name VGGloss-4x4deconv -checkpoint_save_iter 1000
• localhost:8000 shows training visualization

3. PSNR