怎么在摄像头上利用opencv自主进行透视矫正
时间: 2024-05-14 13:14:14 浏览: 103
步骤如下:
1. 导入必要的库
```
import cv2
import numpy as np
```
2. 定义透视变换矩阵
透视变换矩阵需要四个点的坐标来确定,这里我们可以手动选取四个点,也可以使用鼠标交互式地选择四个点。
```
# 手动选取四个点
src_points = np.float32([[180, 310], [420, 310], [30, 470], [580, 470]])
# 鼠标交互式地选择四个点
def select_points(event, x, y, flags, param):
global src_points, point_index
if event == cv2.EVENT_LBUTTONDOWN:
src_points[point_index] = [x, y]
point_index += 1
if point_index == 4:
cv2.destroyAllWindows()
point_index = 0
cv2.namedWindow('image')
cv2.setMouseCallback('image', select_points)
while True:
cv2.imshow('image', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
dst_points = np.float32([[0, 0], [640, 0], [0, 480], [640, 480]])
M = cv2.getPerspectiveTransform(src_points, dst_points)
```
3. 应用透视变换矫正图像
```
frame = cv2.imread('image.jpg')
height, width = frame.shape[:2]
undistorted = cv2.warpPerspective(frame, M, (width, height))
cv2.imshow('undistorted', undistorted)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
这样就可以在摄像头上利用opencv自主进行透视矫正了。
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