用opencv-pycharm,如何找出相交直线的交点的坐标
时间: 2024-02-15 15:04:11 浏览: 87
要找出相交直线的交点的坐标,需要进行以下步骤:
1. 导入 OpenCV 库和 NumPy 库:
```python
import cv2
import numpy as np
```
2. 定义两条直线的起点和终点坐标:
```python
line1_start = (100, 100)
line1_end = (200, 200)
line2_start = (150, 100)
line2_end = (100, 150)
```
3. 用 `cv2.line()` 函数画出两条直线:
```python
img = np.zeros((512, 512, 3), np.uint8)
cv2.line(img, line1_start, line1_end, (0, 0, 255), 2)
cv2.line(img, line2_start, line2_end, (0, 255, 0), 2)
```
4. 使用 `cv2.line()` 函数计算两条直线的交点坐标:
```python
x1, y1 = line1_start
x2, y2 = line1_end
x3, y3 = line2_start
x4, y4 = line2_end
denominator = (y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1)
if denominator == 0:
print("Lines are parallel")
else:
ua = ((x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3)) / denominator
ub = ((x2 - x1) * (y1 - y3) - (y2 - y1) * (x1 - x3)) / denominator
x = int(x1 + ua * (x2 - x1))
y = int(y1 + ua * (y2 - y1))
print("Intersection point: ({}, {})".format(x, y))
```
其中,`ua` 和 `ub` 是两条直线的交点坐标在两条直线的起点和终点之间的比例,如果两条直线平行,则分母为 0,没有交点。最后输出交点的坐标。
阅读全文