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import os |
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import numpy as np |
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from skimage import color, io |
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import torch |
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import torch.nn.functional as F |
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from PIL import Image |
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from models import ColorEncoder, ColorUNet |
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from extractor.manga_panel_extractor import PanelExtractor |
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import argparse |
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os.environ["CUDA_VISIBLE_DEVICES"] = '0' |
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def mkdirs(path): |
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if not os.path.exists(path): |
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os.makedirs(path) |
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def Lab2RGB_out(img_lab): |
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img_lab = img_lab.detach().cpu() |
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img_l = img_lab[:,:1,:,:] |
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img_ab = img_lab[:,1:,:,:] |
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img_l = img_l + 50 |
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pred_lab = torch.cat((img_l, img_ab), 1)[0,...].numpy() |
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out = (np.clip(color.lab2rgb(pred_lab.transpose(1, 2, 0)), 0, 1)* 255).astype("uint8") |
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return out |
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def RGB2Lab(inputs): |
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return color.rgb2lab(inputs) |
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def Normalize(inputs): |
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l = inputs[:, :, 0:1] |
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ab = inputs[:, :, 1:3] |
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l = l - 50 |
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lab = np.concatenate((l, ab), 2) |
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return lab.astype('float32') |
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def numpy2tensor(inputs): |
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out = torch.from_numpy(inputs.transpose(2,0,1)) |
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return out |
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def tensor2numpy(inputs): |
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out = inputs[0,...].detach().cpu().numpy().transpose(1,2,0) |
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return out |
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def preprocessing(inputs): |
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img_lab = Normalize(RGB2Lab(inputs)) |
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img = np.array(inputs, 'float32') |
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img = numpy2tensor(img) |
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img_lab = numpy2tensor(img_lab) |
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return img.unsqueeze(0), img_lab.unsqueeze(0) |
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if __name__ == "__main__": |
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parser = argparse.ArgumentParser(description="Colorize manga images based on a single reference image.") |
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parser.add_argument("-i", "--input_folder", type=str, required=True, help="Path to the input folder containing images to be colorized.") |
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parser.add_argument("-r", "--reference_image", type=str, required=True, help="Path to the reference image.") |
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parser.add_argument("-c", "--ckpt", type=str, required=True, help="Path to the model checkpoint file.") |
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parser.add_argument("-o", "--output_folder", type=str, required=True, help="Path to the output folder to save colorized images.") |
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args = parser.parse_args() |
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device = "cuda" |
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input_folder = args.input_folder |
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reference_image_path = args.reference_image |
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ckpt_path = args.ckpt |
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output_folder = args.output_folder |
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imgsize = 256 |
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ckpt = torch.load(ckpt_path, map_location=lambda storage, loc: storage) |
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colorEncoder = ColorEncoder().to(device) |
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colorEncoder.load_state_dict(ckpt["colorEncoder"]) |
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colorEncoder.eval() |
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colorUNet = ColorUNet().to(device) |
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colorUNet.load_state_dict(ckpt["colorUNet"]) |
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colorUNet.eval() |
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for root, dirs, files in os.walk(input_folder): |
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for file in files: |
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if file.lower().endswith(('.png', '.jpg', '.jpeg', '.gif', '.bmp')): |
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input_image_path = os.path.join(root, file) |
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img_name = os.path.splitext(os.path.basename(input_image_path))[0] |
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img1 = Image.open(input_image_path).convert("RGB") |
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width, height = img1.size |
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img1, img1_lab = preprocessing(img1) |
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img2, img2_lab = preprocessing(Image.open(reference_image_path).convert("RGB")) |
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img1 = img1.to(device) |
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img1_lab = img1_lab.to(device) |
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img2 = img2.to(device) |
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img2_lab = img2_lab.to(device) |
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with torch.no_grad(): |
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img2_resize = F.interpolate(img2 / 255., size=(imgsize, imgsize), mode='bilinear', recompute_scale_factor=False, align_corners=False) |
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img1_L_resize = F.interpolate(img1_lab[:,:1,:,:] / 50., size=(imgsize, imgsize), mode='bilinear', recompute_scale_factor=False, align_corners=False) |
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color_vector = colorEncoder(img2_resize) |
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fake_ab = colorUNet((img1_L_resize, color_vector)) |
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fake_ab = F.interpolate(fake_ab*110, size=(height, width), mode='bilinear', recompute_scale_factor=False, align_corners=False) |
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fake_img = torch.cat((img1_lab[:,:1,:,:], fake_ab), 1) |
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fake_img = Lab2RGB_out(fake_img) |
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out_subfolder = os.path.join(output_folder, os.path.relpath(root, input_folder)) |
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out_folder = os.path.join(out_subfolder, 'color') |
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mkdirs(out_folder) |
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out_img_path = os.path.join(out_folder, f'{img_name}_color.png') |
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io.imsave(out_img_path, fake_img) |
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print(f'Colored images have been saved to {output_folder}.') |
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