From f194457229e4537912467bc60ac3a873f473a63c Mon Sep 17 00:00:00 2001
From: AUTOMATIC <16777216c@gmail.com>
Date: Sun, 11 Sep 2022 18:48:36 +0300
Subject: CLIP interrogator

---
 modules/interrogate.py | 142 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 modules/interrogate.py

(limited to 'modules/interrogate.py')

diff --git a/modules/interrogate.py b/modules/interrogate.py
new file mode 100644
index 00000000..ed97a58b
--- /dev/null
+++ b/modules/interrogate.py
@@ -0,0 +1,142 @@
+import os
+import sys
+import traceback
+from collections import namedtuple
+import re
+
+import torch
+
+from PIL import Image
+from torchvision import transforms
+from torchvision.transforms.functional import InterpolationMode
+
+import modules.shared as shared
+from modules import devices, paths
+
+blip_image_eval_size = 384
+blip_model_url = 'https://storage.googleapis.com/sfr-vision-language-research/BLIP/models/model_base_caption_capfilt_large.pth'
+clip_model_name = 'ViT-L/14'
+
+Category = namedtuple("Category", ["name", "topn", "items"])
+
+re_topn = re.compile(r"\.top(\d+)\.")
+
+class InterrogateModels:
+    blip_model = None
+    clip_model = None
+    clip_preprocess = None
+    categories = None
+
+    def __init__(self, content_dir):
+        self.categories = []
+
+        if os.path.exists(content_dir):
+            for filename in os.listdir(content_dir):
+                m = re_topn.search(filename)
+                topn = 1 if m is None else int(m.group(1))
+
+                with open(os.path.join(content_dir, filename), "r", encoding="utf8") as file:
+                    lines = [x.strip() for x in file.readlines()]
+
+                self.categories.append(Category(name=filename, topn=topn, items=lines))
+
+    def load_blip_model(self):
+        import models.blip
+
+        blip_model = models.blip.blip_decoder(pretrained=blip_model_url, image_size=blip_image_eval_size, vit='base', med_config=os.path.join(paths.paths["BLIP"], "configs", "med_config.json"))
+        blip_model.eval()
+
+        return blip_model
+
+    def load_clip_model(self):
+        import clip
+
+        model, preprocess = clip.load(clip_model_name)
+        model.eval()
+        model = model.to(shared.device)
+
+        return model, preprocess
+
+    def load(self):
+        if self.blip_model is None:
+            self.blip_model = self.load_blip_model()
+
+        self.blip_model = self.blip_model.to(shared.device)
+
+        if self.clip_model is None:
+            self.clip_model, self.clip_preprocess = self.load_clip_model()
+
+        self.clip_model = self.clip_model.to(shared.device)
+
+    def unload(self):
+        if not shared.opts.interrogate_keep_models_in_memory:
+            if self.clip_model is not None:
+                self.clip_model = self.clip_model.to(devices.cpu)
+
+            if self.blip_model is not None:
+                self.blip_model = self.blip_model.to(devices.cpu)
+
+
+    def rank(self, image_features, text_array, top_count=1):
+        import clip
+
+        top_count = min(top_count, len(text_array))
+        text_tokens = clip.tokenize([text for text in text_array]).cuda()
+        with torch.no_grad():
+            text_features = self.clip_model.encode_text(text_tokens).float()
+        text_features /= text_features.norm(dim=-1, keepdim=True)
+
+        similarity = torch.zeros((1, len(text_array))).to(shared.device)
+        for i in range(image_features.shape[0]):
+            similarity += (100.0 * image_features[i].unsqueeze(0) @ text_features.T).softmax(dim=-1)
+        similarity /= image_features.shape[0]
+
+        top_probs, top_labels = similarity.cpu().topk(top_count, dim=-1)
+        return [(text_array[top_labels[0][i].numpy()], (top_probs[0][i].numpy()*100)) for i in range(top_count)]
+
+
+    def generate_caption(self, pil_image):
+        gpu_image = transforms.Compose([
+            transforms.Resize((blip_image_eval_size, blip_image_eval_size), interpolation=InterpolationMode.BICUBIC),
+            transforms.ToTensor(),
+            transforms.Normalize((0.48145466, 0.4578275, 0.40821073), (0.26862954, 0.26130258, 0.27577711))
+        ])(pil_image).unsqueeze(0).to(shared.device)
+
+        with torch.no_grad():
+            caption = self.blip_model.generate(gpu_image, sample=False, num_beams=shared.opts.interrogate_clip_num_beams, min_length=shared.opts.interrogate_clip_min_length, max_length=shared.opts.interrogate_clip_max_length)
+
+        return caption[0]
+
+    def interrogate(self, pil_image):
+        res = None
+
+        try:
+            self.load()
+
+            caption = self.generate_caption(pil_image)
+            res = caption
+
+            images = self.clip_preprocess(pil_image).unsqueeze(0).to(shared.device)
+
+            with torch.no_grad():
+                image_features = self.clip_model.encode_image(images).float()
+
+            image_features /= image_features.norm(dim=-1, keepdim=True)
+
+            if shared.opts.interrogate_use_builtin_artists:
+                artist = self.rank(image_features, ["by " + artist.name for artist in shared.artist_db.artists])[0]
+
+                res += ", " + artist[0]
+
+            for name, topn, items in self.categories:
+                matches = self.rank(image_features, items, top_count=topn)
+                for match, score in matches:
+                    res += ", " + match
+
+        except Exception:
+            print(f"Error interrogating", file=sys.stderr)
+            print(traceback.format_exc(), file=sys.stderr)
+
+        self.unload()
+
+        return res
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