Update README.md

README.md

@@ -15,3 +15,39 @@ configs:
   - split: train
     path: data/train-*
 ---
+
+```python
+from datasets import load_dataset
+from PIL import Image, ImageOps
+
+def resize_and_pad(image, target_size=(512, 512)):
+    # 计算原始图像的宽高比
+    width, height = image.size
+    target_width, target_height = target_size
+    ratio = min(target_width / width, target_height / height)
+    
+    # 等比例缩放图像
+    new_size = (int(width * ratio), int(height * ratio))
+    resized_image = image.resize(new_size)
+    
+    # 创建一个新的黑色背景图像
+    new_image = Image.new("RGB", target_size, (0, 0, 0))
+    
+    # 将缩放后的图像粘贴到新图像的中心
+    new_image.paste(resized_image, ((target_width - new_size[0]) // 2, (target_height - new_size[1]) // 2))
+    
+    return new_image
+
+# 加载数据集
+ds = load_dataset("svjack/Prince_Star")
+
+# 对数据集中的 image 列进行处理
+def process_example(example):
+    example['image'] = resize_and_pad(example['image'])
+    return example
+
+# 应用处理函数到整个数据集
+ds = ds.map(process_example)
+
+ds.push_to_hub("svjack/Prince_Star_512x512")
+```