gallary2 / indexer.py
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import os
import pandas as pd
from PIL import Image, UnidentifiedImageError
import torch
from torchvision import transforms
from transformers import AutoProcessor, FocalNetForImageClassification
import pyarrow as pa
import pyarrow.parquet as pq
# 画像フォルダとモデルのパスを指定
image_folder = "scraped_images" # 画像フォルダのパス
model_path = "MichalMlodawski/nsfw-image-detection-large" # NSFWモデルのパス
# サブフォルダを含めてjpgファイルを再帰的に取得
jpg_files = []
for root, dirs, files in os.walk(image_folder):
for file in files:
if file.lower().endswith(".jpg"):
jpg_files.append(os.path.join(root, file))
# jpgファイルが存在するか確認
if not jpg_files:
print("No jpg files found in folder:", image_folder)
exit()
# モデルとプロセッサの読み込み
feature_extractor = AutoProcessor.from_pretrained(model_path)
model = FocalNetForImageClassification.from_pretrained(model_path)
model.eval()
# 画像の変換処理
transform = transforms.Compose([
transforms.Resize((512, 512)),
transforms.ToTensor(),
transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]),
])
# ラベルとNSFWカテゴリのマッピング
label_to_category = {
"LABEL_0": "Safe",
"LABEL_1": "Questionable",
"LABEL_2": "Unsafe"
}
# 結果を保存するためのリスト
results = []
# ログファイルを作成(破損画像ファイルを記録)
error_log = "error_log.txt"
# 各画像に対して分類処理を行い、結果を取得
for jpg_file in jpg_files:
try:
# 画像を開く
image = Image.open(jpg_file).convert("RGB")
except UnidentifiedImageError:
# 画像を識別できない場合のエラーハンドリング
with open(error_log, "a", encoding="utf-8") as log_file:
log_file.write(f"Unidentified image file: {jpg_file}. Skipping...\n")
print(f"Unidentified image file: {jpg_file}. Skipping...")
continue
image_tensor = transform(image).unsqueeze(0)
# モデルでの推論
inputs = feature_extractor(images=image, return_tensors="pt")
with torch.no_grad():
outputs = model(**inputs)
probabilities = torch.nn.functional.softmax(outputs.logits, dim=-1)
confidence, predicted = torch.max(probabilities, 1)
# ラベルを取得
label = model.config.id2label[predicted.item()]
category = label_to_category.get(label, "Unknown")
# 結果をリストに追加
results.append({
"file_path": jpg_file,
"label": label,
"category": category,
"confidence": confidence.item() * 100
})
# 結果をDataFrameに変換
df = pd.DataFrame(results)
# Parquet形式で保存
parquet_file = "nsfw_classification_results.parquet"
table = pa.Table.from_pandas(df)
pq.write_table(table, parquet_file)
print(f"Classification completed and saved to {parquet_file}!")