用python实现利用Steger方法提取激光条纹中心线
时间: 2024-04-17 18:25:30 浏览: 304
要使用Python实现利用Steger方法提取激光条纹中心线,你可以按照以下步骤进行操作:
1. 导入所需的库和模块:
```python
import cv2
import numpy as np
from scipy.ndimage import filters
```
2. 读取图像并进行预处理:
```python
# 读取图像
image = cv2.imread('laser_stripes.jpg', cv2.IMREAD_GRAYSCALE)
# 对图像进行高斯滤波平滑处理
smoothed = cv2.GaussianBlur(image, (5, 5), 0)
# 计算图像的梯度
gradient_x = cv2.Sobel(smoothed, cv2.CV_64F, 1, 0, ksize=3)
gradient_y = cv2.Sobel(smoothed, cv2.CV_64F, 0, 1, ksize=3)
# 计算图像的梯度幅值和方向
gradient_magnitude = np.sqrt(gradient_x ** 2 + gradient_y ** 2)
gradient_direction = np.arctan2(gradient_y, gradient_x)
```
3. 将梯度幅值图像进行非极大值抑制:
```python
def non_maximum_suppression(magnitude, direction):
rows, cols = magnitude.shape
suppressed = np.zeros((rows, cols), dtype=np.uint8)
angle = direction * 180.0 / np.pi
for i in range(1, rows - 1):
for j in range(1, cols - 1):
q = 255
r = 255
# 方向角度映射到0-180度之间
if (0 <= angle[i, j] < 22.5) or (157.5 <= angle[i, j] <= 180):
q = magnitude[i, j+1]
r = magnitude[i, j-1]
elif 22.5 <= angle[i, j] < 67.5:
q = magnitude[i+1, j-1]
r = magnitude[i-1, j+1]
elif 67.5 <= angle[i, j] < 112.5:
q = magnitude[i+1, j]
r = magnitude[i-1, j]
elif 112.5 <= angle[i, j] < 157.5:
q = magnitude[i-1, j-1]
r = magnitude[i+1, j+1]
if (magnitude[i, j] >= q) and (magnitude[i, j] >= r):
suppressed[i, j] = magnitude[i, j]
else:
suppressed[i, j] = 0
return suppressed
# 对梯度幅值进行非极大值抑制
suppressed_magnitude = non_maximum_suppression(gradient_magnitude, gradient_direction)
```
4. 使用阈值来提取条纹中心线:
```python
# 对抑制后的梯度幅值进行二值化
threshold = 50
binary_image = cv2.threshold(suppressed_magnitude, threshold, 255, cv2.THRESH_BINARY)[1]
# 对二值图像进行形态学操作,填充空洞和去除噪声
kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (5, 5))
morphology_image = cv2.morphologyEx(binary_image, cv2.MORPH_CLOSE, kernel)
# 提取条纹中心线
centerline = np.zeros_like(image)
centerline[morphology_image == 255] = 255
```
5. 可视化结果:
```python
# 显示原始图像和提取的条纹中心线
cv2.imshow('Original Image', image)
cv2.imshow('Centerline', centerline)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
这样,你就可以使用Python实现利用Steger方法提取激光条纹中心线了。记得将`laser_stripes.jpg`替换为你自己的图像文件路径。
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