Update nsfw_detector.py (#1)

- Update nsfw_detector.py (5dc94d63979eb4891797dbdc5fd40f27f0ee10f3)


Co-authored-by: aa <[email protected]>

nsfw_detector.py

@@ -1,65 +0,0 @@
-from torchvision.transforms import Normalize
-import torchvision.transforms as T
-import torch.nn as nn
-from PIL import Image
-import numpy as np
-import torch
-import timm
-from tqdm import tqdm
-
-# https://github.com/Whiax/NSFW-Classifier/raw/main/nsfwmodel_281.pth
-normalize_t = Normalize((0.4814, 0.4578, 0.4082), (0.2686, 0.2613, 0.2757))
-
-#nsfw classifier
-class NSFWClassifier(nn.Module):
-    def __init__(self):
-        super().__init__()
-        nsfw_model=self
-        nsfw_model.root_model = timm.create_model('convnext_base_in22ft1k', pretrained=True)
-        nsfw_model.linear_probe = nn.Linear(1024, 1, bias=False)
-
-    def forward(self, x):
-        nsfw_model = self
-        x = normalize_t(x)
-        x = nsfw_model.root_model.stem(x)
-        x = nsfw_model.root_model.stages(x)
-        x = nsfw_model.root_model.head.global_pool(x)
-        x = nsfw_model.root_model.head.norm(x)
-        x = nsfw_model.root_model.head.flatten(x)
-        x = nsfw_model.linear_probe(x)
-        return x
-
-    def is_nsfw(self, img_paths, threshold = 0.98):
-        skip_step = 1
-        total_len = len(img_paths)
-        if total_len < 100: skip_step = 1
-        if total_len > 100 and total_len < 500: skip_step = 10
-        if total_len > 500 and total_len < 1000: skip_step = 20
-        if total_len > 1000 and total_len < 10000: skip_step = 50
-        if total_len > 10000: skip_step = 100
-
-        for idx in tqdm(range(0, total_len, skip_step), total=int(total_len // skip_step), desc="Checking for NSFW contents"):
-            _img = Image.open(img_paths[idx]).convert('RGB')
-            img = _img.resize((224, 224))
-            img = np.array(img)/255
-            img = T.ToTensor()(img).unsqueeze(0).float()
-            if next(self.parameters()).is_cuda:
-                img = img.cuda()
-            with torch.no_grad():
-                score = self.forward(img).sigmoid()[0].item()
-            if score > threshold:
-                print(f"Detected nsfw score:{score}")
-                _img.save("nsfw.jpg")
-                return True
-        return False
-
-def get_nsfw_detector(model_path='nsfwmodel_281.pth', device="cpu"):
-    #load base model
-    nsfw_model = NSFWClassifier()
-    nsfw_model = nsfw_model.eval()
-    #load linear weights
-    linear_pth = model_path
-    linear_state_dict = torch.load(linear_pth, map_location='cpu')
-    nsfw_model.linear_probe.load_state_dict(linear_state_dict)
-    nsfw_model = nsfw_model.to(device)
-    return nsfw_model