OpenCV-Python Feature2D 特征点检测(含ORB/KAZE/FAST/BRISK/AKAZE)

代码在git

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Open3.x-Python 特征点检测方法

对于OpenCV3.x-Python，特征点检测及显示方法如下：

下面就重点介绍OpenCV3.x-Python中的各种特征点检测方法的使用示例。

测试图像为标准的lena.png

AKAZE Feature Detection

#!/usr/bin/env python# -*- coding=utf-8 -*-# Summary: 使用OpenCV3.x-Python检测AKAZE特征点# Author: Amusi# Date: -03-17# Reference: /master/d8/d30/classcv_1_1AKAZE.htmlimport cv2import numpydef main():img = cv2.imread("lena.png")cv2.imshow('Input Image', img)cv2.waitKey(0)# 检测akaze = cv2.AKAZE_create()keypoints = akaze.detect(img, None)# 显示# 必须要先初始化img2img2 = img.copy()img2 = cv2.drawKeypoints(img, keypoints, img2, color=(0,255,0))cv2.imshow('Detected AKAZE keypoints', img2)cv2.waitKey(0)if __name__ == '__main__':main()

BRISK Feature Detection

import cv2import numpydef main():img = cv2.imread("lena.png")cv2.imshow('Input Image', img)cv2.waitKey(0)brisk = cv2.BRISK_create()keypoints = brisk.detect(img, None)# 必须要先初始化img2img2 = img.copy()img2 = cv2.drawKeypoints(img, keypoints, img2, color=(0,255,0))cv2.imwrite('bk.png', img2)cv2.imshow('Detected BRISK keypoints', img2)cv2.waitKey(0)if __name__ == '__main__':main()

Fast Feature Detection

#!/usr/bin/env python3# -*- coding: utf-8 -*-"""Created on Wed Nov 24 14:08:30 @author: ledi"""#!/usr/bin/env python# -*- coding=utf-8 -*-# Summary: 使用OpenCV3.x-Python检测FAST特征点# Author: Amusi# Date: -03-17# Reference: /master/df/d74/classcv_1_1FastFeatureDetector.htmlimport cv2import numpydef main():img = cv2.imread("lena.png")cv2.imshow('Input Image', img)cv2.waitKey(0)# -03-17 Amusi: OpenCV3.x FeatureDetector写法有变化# OpenCV2.x# fast = cv2.FastFeatureDetector()# keypoints = fast.detect(img, None)# OpenCV3.x# 注意有_create()后缀fast = cv2.FastFeatureDetector_create()keypoints = fast.detect(img, None)# 必须要先初始化img2img2 = img.copy()img2 = cv2.drawKeypoints(img, keypoints, img2, color=(0,255,0))cv2.imwrite('bk.png', img2)cv2.imshow('Detected FAST keypoints', img2)cv2.waitKey(0)if __name__ == '__main__':main()

KAZE Feature Detection

#!/usr/bin/env python3# -*- coding: utf-8 -*-"""Created on Wed Nov 24 14:15:45 @author: ledi"""#!/usr/bin/env python# -*- coding=utf-8 -*-# Summary: 使用OpenCV3.x-Python检测KAZE特征点# Author: Amusi# Date: -03-17# Reference: /master/d3/d61/classcv_1_1KAZE.htmlimport cv2import numpydef main():img = cv2.imread("lena.png")cv2.imshow('Input Image', img)cv2.waitKey(0)# 检测kaze = cv2.KAZE_create()keypoints = kaze.detect(img, None)# 显示# 必须要先初始化img2img2 = img.copy()img2 = cv2.drawKeypoints(img, keypoints, img2, color=(0,255,0))cv2.imwrite('kaze.png', img2)cv2.imshow('Detected KAZE keypoints', img2)cv2.waitKey(0)if __name__ == '__main__':main()

ORB Feature Detection

#!/usr/bin/env python# -*- coding=utf-8 -*-# Summary: 使用OpenCV3.x-Python检测ORB特征点# Author: Amusi# Date: -03-17# Reference: /master/db/d95/classcv_1_1ORB.htmlimport cv2import numpydef main():img = cv2.imread("lena.png")cv2.imshow('Input Image', img)cv2.waitKey(0)# 检测orb = cv2.ORB_create()keypoints = orb.detect(img, None)# 显示# 必须要先初始化img2img2 = img.copy()img2 = cv2.drawKeypoints(img, keypoints, img2, color=(0,255,0))cv2.imwrite('orb.png', img2)cv2.imshow('Detected ORB keypoints', img2)cv2.waitKey(0)if __name__ == '__main__':main()

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