opencv图像居中打码
时间: 2024-09-08 18:02:20 浏览: 103
opencv opencv 图像处理
在OpenCV库中,如果你想要将文本或者图片居中打码(遮罩),你可以通过以下步骤操作:
1. 导入需要的模块:
```python
import cv2
import numpy as np
```
2. 加载图像,并计算宽度和高度:
```python
image = cv2.imread('your_image_path.jpg')
height, width = image.shape[:2]
```
3. 创建一个遮罩(通常是白色的矩形框),大小等于原图尺寸,然后设置中间部分透明(黑色)以便打码:
```python
mask_size = (width, height)
mask = np.zeros(mask_size, dtype=np.uint8)
center_x, center_y = int(width / 2), int(height / 2)
radius = min(center_x, center_y) // 2 # 遮罩半径取较小边的一半
# 使用圆环状掩码填充中间区域
cv2.circle(mask, (center_x, center_y), radius, 255, -1)
```
4. 将遮罩与原图相乘,得到打码后的图像:
```python
masked_image = cv2.bitwise_and(image, image, mask=mask)
```
5. 显示结果:
```python
cv2.imshow('Masked Image', masked_image)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
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