OpenCV SURF function is not implemented
Solution 1
Taken from this answer (why don't you google your question before asking?):
The SIFT and SURF code was moved in OpenCV v2.4 to a new module called
nonfree
. Make sure you are linking (DLL in Windlows) to it. In linux this library is called libopencv_nonfree.so
.
Solution 2
It's not a bug. SURF is located in nonfree module. To use it you should initialize nonfree module:
#include <opencv2/nonfree/nonfree.hpp>
...
cv::initModule_nonfree();
Solution 3
Recently, I am learning the SURF. For this question you can add the opencv_nonfree240d.lib and opencv_nonfree240.lib to your project's lib path.
rotating_image
Interested in 3D computer vision and optimization .
Updated on August 07, 2020Comments
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rotating_image almost 4 years
When I try to run the sample
find_obj.cpp
or any OpenCV SURF program I get the following error in command prompt while executing the code. The project builds without errors and warnings. I am using VS2011 beta, OpenCV 2.4 and windows7.Error message:
OpenCV Error: The function/feature is not implemented < OpenCV was built without SURF support> in unknown function,file ..\..\..\src\opencv\modules\legacy\src\features2d.cpp, line 77
I tried to build the OpenCV 2.4 again using Cmake and then VS2011 in debug mode and then added the lib paths in the IDE, but still no result.
How can I fix that?
#include <opencv2/objdetect/objdetect.hpp> #include <opencv2/features2d/features2d.hpp> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/legacy/legacy.hpp> #include <opencv2/legacy/compat.hpp> #include <opencv2/flann/flann.hpp> #include <opencv2/calib3d/calib3d.hpp> #include <opencv2/nonfree/features2d.hpp> #include <opencv2/nonfree/nonfree.hpp> using namespace std; using namespace cv; int main() { cv::initModule_nonfree();//THIS LINE IS IMPORTANT IplImage *image1 = cvLoadImage("C:\\SURF\\1.jpg"); IplImage *image2 = cvLoadImage("C:\\SURF\\2.jpg"); CvMemStorage* memoryBlock = cvCreateMemStorage(); CvSeq* image1KeyPoints; CvSeq* image1Descriptors; CvSeq* image2KeyPoints; CvSeq* image2Descriptors; // Only values with a hessian greater than 500 are considered for keypoints CvSURFParams params = cvSURFParams(500, 1); cvExtractSURF(image1, 0, &image1KeyPoints, &image1Descriptors, memoryBlock, params); cvExtractSURF(image2, 0, &image2KeyPoints, &image2Descriptors, memoryBlock, params); return 0; }
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rotating_image almost 12 yearsya i googled the opencv forums and i included the opencv_nonfree240.lib ..and the headers are 1......opencv2/objdetect/objdetect.hpp....... 2......opencv2/features2d/features2d.hpp..... 3......opencv2/highgui/highgui.hpp...... 4......opencv2/calib3d/calib3d.hpp..... 5......opencv2/nonfree/nonfree.hpp...... 6......opencv2/imgproc/imgproc_c.h....... 7......opencv2/legacy/legacy.hpp...... 8......opencv2/legacy/compat.hpp......
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rotating_image almost 12 years@Astor....in the IDE...i set the path to the C:\OpenCV2.4\opencv\build\x86\vc10\lib...i have saved the opencv2.4 in c drive...the bin folder contains all the dll where i have checked it contains the opencv_nonfree240.dll...and in the additional dependencies i have given the opencv_nonfree240.lib
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rotating_image almost 12 yearslibrary directories = C:\OpenCV2.4\opencv\build\x86\vc10\lib additional dependencies = opencv_nonfree240.lib this is my setting in VS2011
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rotating_image almost 12 years@astor...ya i have done all d necessary...all the other programs using opencv libraries are working fine ..i donno why this is showing problem...i m posting a small sample code which i wrote
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rotating_image almost 12 yearsthanx astor for your guidelines...the problem got solved...i was forgettin the cv::initModule_nonfree() line...
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Jav_Rock over 11 years@Astor I googled and I was taken here, solving my problem, thanks. I dind't know they were moved as I use CMake and I don't have to usually worry about libs, but it is good to know. Do you know why they were moved?