Which distance function does openCVs flannBasedMatcher use and is it possible to change the default? In the user manual from the original flann by Muja and Lowe there are some different distance types (flann_distance_t) and I don't see a method in opencv to change them :-/
Which distance function does FlannBasedMatcher use and how to change it?
1.8k Views Asked by Hans Sperker At
1
There are 1 best solutions below
Related Questions in OPENCV
- segmentation fault: 11, extracting data in vector
- Disable OpenCL in OpenCV completely
- Python - Writing your own function with opencv giving an error
- Opengl Augmented Reality in Android from solvepnp
- OpenCv Multispectral Image openCV
- Displaying bitmap image on Android (OpenCV)
- Applying homography on non planar surface
- BackgroundSubtractor getBackgroundImage() function return empty Image
- How to choose good SURF feature keypoints?
- opencv python error: Assertion failed (size.width>0 && size.height>0)
- CIDetector to filter rectangle and get cropped image
- How to detect squares in video with OpenCV?
- Python OpenCV error: (-215) size.width>0 && size.height>0 in function imshow
- OpenCV algorithm of contours searching and creation of bounding rectagle
- OpenCV Opening/Closing shifts the positions of the pixels
Related Questions in FLANN
- OpenCV : AttributeError: 'list' object has no attribute 'queryIdx'
- Python: how to get a similarity matrix symmetric
- FLANN Autotune Stuck at "Estimating number of checks"
- FLANN Python Bindings Mac OS X
- OpenCV templates in 2D point data set
- improve featureMatching with SIFT and Flann
- Error: ...protected functions
- Error:.. 'va_list' has not been declared
- cannot find -lboost_program_options
- Hdf5.h compile error
- How does FLANN select what algorithm and parameters to use?
- Comparison of one image with a base of images
- what type of data does flann index need by using LshIndexParams?
- Features2d + Homography not giving appropriate results
- Which distance function does FlannBasedMatcher use and how to change it?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
This is very poorly documented in the code for openCV but the default settings for the flannBasedMatcher are found in these two functions
flann::SearchParams(); //32 checks, 0, sorted=true flann::KDTreeIndexParams(); //uses 4 randomized KD trees
The distance function by default is FLANN_DIST_L2.
I think this bit of code explains why you can't yet change it
printf("[WARNING] You are using cv::flann::Index (or cv::flann::GenericIndex) and have also changed the distance using cvflann::set_distance_type. This is no longer working as expected cv::flann::Index always uses L2). You should create the index templated on the distance, for example for L1 distance use: GenericIndex< L1<float> > \n"); \