OpenCV3.1 SIFT使用

OpenCV3对OpenCV的模块进行了调整，将开发中与nofree模块放在了OpenCV_contrib中（包含SIFT），gitHub上的官方项目分成了两个，opencv 与 opencv_contrib。所以，要使用sift接口需在opencv3.1基础上，再安装opencv_contrib。本文主要记录如何安装opencv_contrib，配置Xcode，sift接口的用法。
环境：OSX + Xcode + OpenCV3.1

OpenCV31 SIFT使用
- install opencv_contrib
- configuration Xcode
  - pro_name Build Setting Search Paths
  - pro_name Build Setting Other Linker Flags
- sample of sift
- References

install opencv_contrib

download contrib source code https://github.com/Itseez/opencv_contrib, follow README.md to install

$ cd <opencv_build_directory>
$ cmake -DOPENCV_EXTRA_MODULES_PATH=<opencv_contrib>/modules <opencv_source_directory>
$ make -j5
$ sudo make install

Where <opencv_build_directory> and <opencv_source_directory> is directory in opencv3.1 install tutorial

configuration Xcode

like How to develop OpenCV with Xcode

pro_name Build Setting > Search Paths

/usr/local/lib
/usr/local/include

pro_name Build Setting >Other Linker Flags

-lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_dnn -lopencv_dpm -lopencv_fuzzy -lopencv_line_descriptor -lopencv_optflow -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_rgbd -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_face -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lippicv -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core

sample of sift

sample in (souce_dir)/samples/cpp/tutorial_code/xfeatures2D/LATCH_match.cpp or bellow


#include "opencv2/xfeatures2d.hpp"//
// now, you can no more create an instance on the 'stack', like in the tutorial
// (yea, noticed for a fix/pr).
// you will have to use cv::Ptr all the way down:
//
cv::Ptr<Feature2D> f2d = xfeatures2d::SIFT::create();
//cv::Ptr<Feature2D> f2d = xfeatures2d::SURF::create();
//cv::Ptr<Feature2D> f2d = ORB::create();
// you get the picture, i hope..//-- Step 1: Detect the keypoints:
std::vector<KeyPoint> keypoints_1, keypoints_2;
f2d->detect( img_1, keypoints_1 );
f2d->detect( img_2, keypoints_2 );//-- Step 2: Calculate descriptors (feature vectors)
Mat descriptors_1, descriptors_2;
f2d->compute( img_1, keypoints_1, descriptors_1 );
f2d->compute( img_2, keypoints_2, descriptors_2 );//-- Step 3: Matching descriptor vectors using BFMatcher :
BFMatcher matcher;
std::vector< DMatch > matches;
matcher.match( descriptors_1, descriptors_2, matches );

References

https://github.com/Itseez/opencv_contrib
https://github.com/Itseez/opencv
http://blog.csdn.net/lijiang1991/article/details/50756065
http://docs.opencv.org/3.1.0/d5/d3c/classcv_1_1xfeatures2d_1_1SIFT.html#gsc.tab=0

OpenCV3.1 xfeatures2d::SIFT 使用相关推荐

OpenCV3如何使用SIFT和SURF Where did SIFT and SURF go in OpenCV 3?
If you've had a chance to play around with OpenCV 3 (and do a lot of work with keypoint If you've ha ...
opencv4.10不能使用sift = cv2.xfeatures2d.SIFT_create()
python3.6 报错: error: (-213:The function/feature is not implemented) This algorithm is patented and i ...
图像特征点—SIFT特征点
图像特征点-SIFT特征点关于SIFT特征点,以下三篇博客说的非常详细,再次不再赘述. https://mp.weixin.qq.com/s/XVB88f119gRqpwTTRvTyrA https ...
OpenCV-Python Feature2D 特征点检测 (SIFT,SURF)
git LINK 下面介绍属于nonfree的特征检测方法,如SIFT和SURF. 这些方法在opencv-contrib中,所以想要使用前,请卸载当前非contrib版本的opencv,即pip u ...
OpenCV3.4.1+opencv_contrib编译：windows10
做计算机视觉的朋友,估计没有人没用过OpenCV,著名的开源计算机视觉算法库.OpenCV还在不断发展中,最新的3.4版本,已经可以支持cnn了,以后估计会有集成更多的功能. 不过,由于知识产权的原因 ...
【CV学习4】OpenCV-Python: SIFT Demo one
# -*-coding:utf-8-*- #author: lyp time: 2018/7/31 import cv2 import numpy as npimg = cv2.imread('SLA ...
Ubuntu下安装opencv3.4.6+opencv_contrib
简介在安装HyperLPR(C++)的过程中需要opencv+opencv_contrib. 1.1 安装包下载注意 opencv与opencv-contrib的版本应该一致 opencv 下载 ...
OpenCV-Python Feature2D 特征点检测(含SIFT/SURF/ORB/KAZE/FAST/BRISK/AKAZE)
对于OpenCV-Python,OpenCV2.x和OpenCV3.x的函数使用方式有很大不同.网上很多教程都还是基于OpenCV2.x,此版本已经逐渐被弃用. 本教程针对特征点检测,分析OpenCV ...
Opencv实现Sift、Surf、ORB特征提取与匹配
在opencv3中,这三个算子都转移到一个名为xfeature2d的第三方库中,而在opencv2中这三个算子在nonfree库中. 关于在vs下配置opencv可参考我转载的另外一篇文章.注意版本号 ...

OpenCV3.1 xfeatures2d::SIFT 使用