状态：已完成
【Python 代码】实现图像读取与预处理函数
```python
import cv2
import numpy as np
def read_and_preprocess_image(image_path, target_size=(224, 224)):
# 读取图像
image = cv2.imread(image_path)
if image is None:
raise FileNotFoundError(f"Image not found: {image_path}")
# 转换为RGB
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
# 调整大小
image = cv2.resize(image, target_size)
# 归一化
image = image.astype(np.float32) / 255.0
return image
```