| import contextlib |
| import os |
|
|
| import numpy as np |
| import torch |
| from PIL import Image |
| from basicsr.utils.download_util import load_file_from_url |
| from tqdm import tqdm |
|
|
| from modules import modelloader, devices, script_callbacks, shared |
| from modules.shared import cmd_opts, opts, state |
| from swinir_model_arch import SwinIR as net |
| from swinir_model_arch_v2 import Swin2SR as net2 |
| from modules.upscaler import Upscaler, UpscalerData |
|
|
|
|
| device_swinir = devices.get_device_for('swinir') |
|
|
|
|
| class UpscalerSwinIR(Upscaler): |
| def __init__(self, dirname): |
| self.name = "SwinIR" |
| self.model_url = "https://github.com/JingyunLiang/SwinIR/releases/download/v0.0" \ |
| "/003_realSR_BSRGAN_DFOWMFC_s64w8_SwinIR" \ |
| "-L_x4_GAN.pth " |
| self.model_name = "SwinIR 4x" |
| self.user_path = dirname |
| super().__init__() |
| scalers = [] |
| model_files = self.find_models(ext_filter=[".pt", ".pth"]) |
| for model in model_files: |
| if "http" in model: |
| name = self.model_name |
| else: |
| name = modelloader.friendly_name(model) |
| model_data = UpscalerData(name, model, self) |
| scalers.append(model_data) |
| self.scalers = scalers |
|
|
| def do_upscale(self, img, model_file): |
| model = self.load_model(model_file) |
| if model is None: |
| return img |
| model = model.to(device_swinir, dtype=devices.dtype) |
| img = upscale(img, model) |
| try: |
| torch.cuda.empty_cache() |
| except: |
| pass |
| return img |
|
|
| def load_model(self, path, scale=4): |
| if "http" in path: |
| dl_name = "%s%s" % (self.model_name.replace(" ", "_"), ".pth") |
| filename = load_file_from_url(url=path, model_dir=self.model_path, file_name=dl_name, progress=True) |
| else: |
| filename = path |
| if filename is None or not os.path.exists(filename): |
| return None |
| if filename.endswith(".v2.pth"): |
| model = net2( |
| upscale=scale, |
| in_chans=3, |
| img_size=64, |
| window_size=8, |
| img_range=1.0, |
| depths=[6, 6, 6, 6, 6, 6], |
| embed_dim=180, |
| num_heads=[6, 6, 6, 6, 6, 6], |
| mlp_ratio=2, |
| upsampler="nearest+conv", |
| resi_connection="1conv", |
| ) |
| params = None |
| else: |
| model = net( |
| upscale=scale, |
| in_chans=3, |
| img_size=64, |
| window_size=8, |
| img_range=1.0, |
| depths=[6, 6, 6, 6, 6, 6, 6, 6, 6], |
| embed_dim=240, |
| num_heads=[8, 8, 8, 8, 8, 8, 8, 8, 8], |
| mlp_ratio=2, |
| upsampler="nearest+conv", |
| resi_connection="3conv", |
| ) |
| params = "params_ema" |
|
|
| pretrained_model = torch.load(filename) |
| if params is not None: |
| model.load_state_dict(pretrained_model[params], strict=True) |
| else: |
| model.load_state_dict(pretrained_model, strict=True) |
| return model |
|
|
|
|
| def upscale( |
| img, |
| model, |
| tile=None, |
| tile_overlap=None, |
| window_size=8, |
| scale=4, |
| ): |
| tile = tile or opts.SWIN_tile |
| tile_overlap = tile_overlap or opts.SWIN_tile_overlap |
|
|
|
|
| img = np.array(img) |
| img = img[:, :, ::-1] |
| img = np.moveaxis(img, 2, 0) / 255 |
| img = torch.from_numpy(img).float() |
| img = img.unsqueeze(0).to(device_swinir, dtype=devices.dtype) |
| with torch.no_grad(), devices.autocast(): |
| _, _, h_old, w_old = img.size() |
| h_pad = (h_old // window_size + 1) * window_size - h_old |
| w_pad = (w_old // window_size + 1) * window_size - w_old |
| img = torch.cat([img, torch.flip(img, [2])], 2)[:, :, : h_old + h_pad, :] |
| img = torch.cat([img, torch.flip(img, [3])], 3)[:, :, :, : w_old + w_pad] |
| output = inference(img, model, tile, tile_overlap, window_size, scale) |
| output = output[..., : h_old * scale, : w_old * scale] |
| output = output.data.squeeze().float().cpu().clamp_(0, 1).numpy() |
| if output.ndim == 3: |
| output = np.transpose( |
| output[[2, 1, 0], :, :], (1, 2, 0) |
| ) |
| output = (output * 255.0).round().astype(np.uint8) |
| return Image.fromarray(output, "RGB") |
|
|
|
|
| def inference(img, model, tile, tile_overlap, window_size, scale): |
| |
| b, c, h, w = img.size() |
| tile = min(tile, h, w) |
| assert tile % window_size == 0, "tile size should be a multiple of window_size" |
| sf = scale |
|
|
| stride = tile - tile_overlap |
| h_idx_list = list(range(0, h - tile, stride)) + [h - tile] |
| w_idx_list = list(range(0, w - tile, stride)) + [w - tile] |
| E = torch.zeros(b, c, h * sf, w * sf, dtype=devices.dtype, device=device_swinir).type_as(img) |
| W = torch.zeros_like(E, dtype=devices.dtype, device=device_swinir) |
|
|
| with tqdm(total=len(h_idx_list) * len(w_idx_list), desc="SwinIR tiles") as pbar: |
| for h_idx in h_idx_list: |
| if state.interrupted or state.skipped: |
| break |
|
|
| for w_idx in w_idx_list: |
| if state.interrupted or state.skipped: |
| break |
| |
| in_patch = img[..., h_idx: h_idx + tile, w_idx: w_idx + tile] |
| out_patch = model(in_patch) |
| out_patch_mask = torch.ones_like(out_patch) |
|
|
| E[ |
| ..., h_idx * sf: (h_idx + tile) * sf, w_idx * sf: (w_idx + tile) * sf |
| ].add_(out_patch) |
| W[ |
| ..., h_idx * sf: (h_idx + tile) * sf, w_idx * sf: (w_idx + tile) * sf |
| ].add_(out_patch_mask) |
| pbar.update(1) |
| output = E.div_(W) |
|
|
| return output |
|
|
|
|
| def on_ui_settings(): |
| import gradio as gr |
|
|
| shared.opts.add_option("SWIN_tile", shared.OptionInfo(192, "Tile size for all SwinIR.", gr.Slider, {"minimum": 16, "maximum": 512, "step": 16}, section=('upscaling', "Upscaling"))) |
| shared.opts.add_option("SWIN_tile_overlap", shared.OptionInfo(8, "Tile overlap, in pixels for SwinIR. Low values = visible seam.", gr.Slider, {"minimum": 0, "maximum": 48, "step": 1}, section=('upscaling', "Upscaling"))) |
|
|
|
|
| script_callbacks.on_ui_settings(on_ui_settings) |
|
|
