Pytorch implementation of "Pixcolor:Pixel Recursive Colorization" (in progress)
paper link: here
PixColor is a state-of-the-art colorization method. It is able to produce multiple versions of colored images when given a single black and white image input. The two main networks require separate training. As you can already infer from the image below, a slight drawback can be that the model is a bit heavy and is trained with the aid of 8(!) GPUs.
***Note This is not a complete implementation. The coloring network needs to be added.
pix_network_1.py
Conditioning Network: Pretrain conditioning network on COCO image segmentation
Adaptation Network: Conditioning and adaptation network turn brightness channel Y into a set of features that are used for conditioning the PixelCNN.
Coloring Network(pixelCNN): pixelCNN is optimized alongside conditioning and adaptation network. It predicts a low resolution chrominance of the image
pix_network_2.py