python等比縮放圖片

import imghdr import time from io import BytesIO import pyarrow.parquet as pq from PIL import Image def resize_image(img, max_side_length=768): # 打開圖像文件 width, height = img.size print("原:寬X高", width, "x", height) # 計算縮放後的尺寸 scale_factor = max_side_length / max(width, height) new_width = int(width * scale_factor) new_height = int(height * scale_factor) # 縮放圖像 resized_img = img.resize((new_width, new_height)) return resized_img file1 = "/Users/chennan/Downloads/2.parquet" df = pq.read_pandas(file1).to_pandas() select_df = df.loc[:100] for index, row in select_df.iterrows(): url = row['URL'] buff = BytesIO(url) img = Image.open(buff) width, height = img.size if max(width, height) < 768: continue resize_img = resize_image(img) buff.seek(0) img_type = imghdr.what(buff) print(resize_img.size, img_type) timestamp = int(time.time()) resize_img.save(f"{timestamp}.{img_type}") img.save(f"原_{timestamp}.{img_type}") time.sleep(0.1)