指纹识别算法python代码
时间: 2023-10-03 10:07:23 浏览: 148
以下是用Python实现的简单指纹识别算法代码:
```python
import numpy as np
import cv2
# 读取指纹图像
img = cv2.imread('fingerprint.jpg', 0)
# 进行二值化处理
ret, thresh = cv2.threshold(img, 127, 255, cv2.THRESH_BINARY)
# 进行形态学操作,去掉噪声
kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (3,3))
closed = cv2.morphologyEx(thresh, cv2.MORPH_CLOSE, kernel)
# 找到指纹轮廓
contours, hierarchy = cv2.findContours(closed, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
# 计算指纹面积
area = cv2.contourArea(contours[0])
# 计算指纹周长
perimeter = cv2.arcLength(contours[0], True)
# 计算指纹纹路密度
density = area / perimeter
# 显示结果
cv2.imshow('Original', img)
cv2.imshow('Binary', thresh)
cv2.imshow('Morphological', closed)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
这段代码使用OpenCV库实现了指纹图像的二值化、形态学操作、轮廓检测和指纹特征计算。
阅读全文