取patches代码
时间: 2023-07-02 07:15:39 浏览: 167
Python库 | extract_patches-0.1.3.tar.gz
以下是Python中使用OpenCV库取patches的示例代码:
```
import cv2
# 读取原始医学图像
img = cv2.imread("original_image.png")
# 确定patch的数量和大小
patch_size = (128, 128) # patch的大小
patch_count = 10 # patch的数量
# 在原始医学图像中随机选择patch的位置
h, w = img.shape[:2]
x = [int(w * i / (patch_count + 1)) for i in range(1, patch_count + 1)]
y = [int(h * i / (patch_count + 1)) for i in range(1, patch_count + 1)]
# 遍历每个patch,从原始医学图像中提取相应的区域
for i in range(patch_count):
patch_x = x[i] - patch_size[0] // 2
patch_y = y[i] - patch_size[1] // 2
patch = img[patch_y: patch_y + patch_size[1], patch_x: patch_x + patch_size[0]]
# 对每个patch进行预处理,如归一化、裁剪、旋转等
# ...
# 显示提取的patch
cv2.imshow("patch{}".format(i), patch)
cv2.waitKey(0) # 等待用户按下按键
cv2.destroyAllWindows() # 关闭所有窗口
```
以上代码中,首先读取原始医学图像,然后随机选择一些位置作为patch的中心,并根据patch的大小从原始医学图像中提取相应的区域。最后对每个patch进行预处理,并显示出来。可以根据具体应用场景和需求修改代码中的参数,来实现不同的patch提取方式。
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