Sift Extraction - opencv

c++ opencv sift surf feature-extraction
Filipe picture Filipe · Jul 7, 2012 · Viewed 10.5k times · Source

I'm trying to get started working with sift feature extraction using (C++) OpenCv. I need to extract features using SIFT, match them between the original image (e.g. a book) and a scene, and after that calculate the camera pose.

So far I have found this algorithm using SURF. Does anyone know a base code from which I can get started, or maybe a way to convert the algorithm in the link from SURF to SIFT?

Thanks in advance.

EDIT: Ok, I worked out a solution for the sift problem. Now I'm trying to figure the camera pose. I'm trying to use: solvePnP, can anyone help me with an example?

Answer

Adi Shavit picture Adi Shavit · Jul 7, 2012

Check out the feature2d tutorial section of the new OpenCV docs website. There tutorials with code showing:

  1. Feature detection with e.g. SURF
  2. Feature Description
  3. Feature Matching

Related questions

opencv FLANN with ORB descriptors?

I am trying to use FLANN with ORB descriptors, but opencv crashes with this simple code: vector<vector<KeyPoint> > dbKeypoints; vector<Mat> dbDescriptors; vector<Mat> objects; /* load Descriptors from images (with OrbDescriptorExtractor()) */ …

Read More
SIFT, HOG and SURF c++, opencv

I have a simple question, which I want to know, what kind of libraries are available and can give good results for implementing SIFT, HOG(Histogram Oriented Gradient) and SURF in c++ or opencv? Hence: 1- Give me the link …

Read More
how to use SIFT in opencv

I am learning C++ and OpenCV these days. Given an image, I want to extract its SIFT features. From http://docs.opencv.org/modules/nonfree/doc/feature_detection.html, we can know that OpenCV 2.4.8 has the SIFT module. See here: …

Read More