-
-
Save thorikawa/3398619 to your computer and use it in GitHub Desktop.
#include <opencv2/opencv.hpp> | |
#include <opencv2/nonfree/nonfree.hpp> | |
#include <iostream> | |
#include <vector> | |
#include <cmath> | |
using namespace std; | |
using namespace cv; | |
const double THRESHOLD = 400; | |
/** | |
* Calculate euclid distance | |
*/ | |
double euclidDistance(Mat& vec1, Mat& vec2) { | |
double sum = 0.0; | |
int dim = vec1.cols; | |
for (int i = 0; i < dim; i++) { | |
sum += (vec1.at<uchar>(0,i) - vec2.at<uchar>(0,i)) * (vec1.at<uchar>(0,i) - vec2.at<uchar>(0,i)); | |
} | |
return sqrt(sum); | |
} | |
/** | |
* Find the index of nearest neighbor point from keypoints. | |
*/ | |
int nearestNeighbor(Mat& vec, vector<KeyPoint>& keypoints, Mat& descriptors) { | |
int neighbor = -1; | |
double minDist = 1e6; | |
for (int i = 0; i < descriptors.rows; i++) { | |
KeyPoint pt = keypoints[i]; | |
Mat v = descriptors.row(i); | |
double d = euclidDistance(vec, v); | |
//printf("%d %f\n", v.cols, d); | |
if (d < minDist) { | |
minDist = d; | |
neighbor = i; | |
} | |
} | |
if (minDist < THRESHOLD) { | |
return neighbor; | |
} | |
return -1; | |
} | |
/** | |
* Find pairs of points with the smallest distace between them | |
*/ | |
void findPairs(vector<KeyPoint>& keypoints1, Mat& descriptors1, | |
vector<KeyPoint>& keypoints2, Mat& descriptors2, | |
vector<Point2f>& srcPoints, vector<Point2f>& dstPoints) { | |
for (int i = 0; i < descriptors1.rows; i++) { | |
KeyPoint pt1 = keypoints1[i]; | |
Mat desc1 = descriptors1.row(i); | |
int nn = nearestNeighbor(desc1, keypoints2, descriptors2); | |
if (nn >= 0) { | |
KeyPoint pt2 = keypoints2[nn]; | |
srcPoints.push_back(pt1.pt); | |
dstPoints.push_back(pt2.pt); | |
} | |
} | |
} | |
int main(int argc, char** argv) { | |
if (argc < 2) { | |
cerr << "Too few arguments" << endl; | |
return -1; | |
} | |
const char* filename = argv[1]; | |
printf("load file:%s\n", filename); | |
// initialize detector and extractor | |
FeatureDetector* detector; | |
detector = new SiftFeatureDetector( | |
0, // nFeatures | |
4, // nOctaveLayers | |
0.04, // contrastThreshold | |
10, //edgeThreshold | |
1.6 //sigma | |
); | |
DescriptorExtractor* extractor; | |
extractor = new SiftDescriptorExtractor(); | |
// Compute keypoints and descriptor from the source image in advance | |
vector<KeyPoint> keypoints2; | |
Mat descriptors2; | |
Mat originalGrayImage = imread(filename, CV_LOAD_IMAGE_GRAYSCALE); | |
if (!originalGrayImage.data) { | |
cerr << "gray image load error" << endl; | |
return -1; | |
} | |
Mat originalColorImage = imread(filename, CV_LOAD_IMAGE_ANYCOLOR|CV_LOAD_IMAGE_ANYDEPTH); | |
if (!originalColorImage.data) { | |
cerr << "color image open error" << endl; | |
return -1; | |
} | |
detector->detect(originalGrayImage, keypoints2); | |
extractor->compute(originalGrayImage, keypoints2, descriptors2); | |
printf("original image:%d keypoints are found.\n", (int)keypoints2.size()); | |
VideoCapture capture(0); | |
capture.set(CV_CAP_PROP_FRAME_WIDTH,640); | |
capture.set(CV_CAP_PROP_FRAME_HEIGHT,480); | |
namedWindow("mywindow"); | |
Mat frame; | |
while (1) { | |
capture >> frame; | |
// load gray scale image from camera | |
Size size = frame.size(); | |
Mat grayFrame(size, CV_8UC1); | |
cvtColor(frame, grayFrame, CV_BGR2GRAY); | |
if (!grayFrame.data) { | |
cerr << "cannot find image file1" << endl; | |
exit(-1); | |
} | |
// Create a image for displaying mathing keypoints | |
Size sz = Size(size.width + originalColorImage.size().width, size.height + originalColorImage.size().height); | |
Mat matchingImage = Mat::zeros(sz, CV_8UC3); | |
// Draw camera frame | |
Mat roi1 = Mat(matchingImage, Rect(0, 0, size.width, size.height)); | |
frame.copyTo(roi1); | |
// Draw original image | |
Mat roi2 = Mat(matchingImage, Rect(size.width, size.height, originalColorImage.size().width, originalColorImage.size().height)); | |
originalColorImage.copyTo(roi2); | |
vector<KeyPoint> keypoints1; | |
Mat descriptors1; | |
vector<DMatch> matches; | |
// Detect keypoints | |
detector->detect(grayFrame, keypoints1); | |
extractor->compute(grayFrame, keypoints1, descriptors1); | |
printf("image1:%zd keypoints are found.\n", keypoints1.size()); | |
for (int i=0; i<keypoints1.size(); i++){ | |
KeyPoint kp = keypoints1[i]; | |
circle(matchingImage, kp.pt, cvRound(kp.size*0.25), Scalar(255,255,0), 1, 8, 0); | |
} | |
// Find nearest neighbor pairs | |
vector<Point2f> srcPoints; | |
vector<Point2f> dstPoints; | |
findPairs(keypoints1, descriptors1, keypoints2, descriptors2, srcPoints, dstPoints); | |
printf("%zd keypoints are matched.\n", srcPoints.size()); | |
char text[256]; | |
sprintf(text, "%zd/%zd keypoints matched.", srcPoints.size(), keypoints2.size()); | |
putText(matchingImage, text, Point(0, cvRound(size.height + 30)), FONT_HERSHEY_SCRIPT_SIMPLEX, 1, Scalar(0,0,255)); | |
// Draw line between nearest neighbor pairs | |
for (int i = 0; i < (int)srcPoints.size(); ++i) { | |
Point2f pt1 = srcPoints[i]; | |
Point2f pt2 = dstPoints[i]; | |
Point2f from = pt1; | |
Point2f to = Point(size.width + pt2.x, size.height + pt2.y); | |
line(matchingImage, from, to, Scalar(0, 255, 255)); | |
} | |
// Display mathing image | |
imshow("mywindow", matchingImage); | |
int c = waitKey(2); | |
if (c == '\x1b') | |
break; | |
} | |
return 0; | |
} |
please upload
opencv2/nonfree/nonfree.hpp also
During First Run it gave me access vialation error. After going through code, I found bugs.... here
In euclidDistance function , It wasn't able to access both vectors i.e.(1 D Matrix ) vec1 and vec2 :-
So I made change here as follow:
for (int i = 0; i < 1; i++)
for( int j=0; j< dim ; j++)
{
uchar * a = vec1.ptr(i);
uchar * b = vec2.ptr(i);
sum += (a[j]- b[j]) *(a[j]- b[j]) ;
}
And it working well :-) 👍
hi guys
i want change this code that replace input images from hard rather than camera
can you help me ????
Hello, How to compile sift code???
install nonfree on ubuntu
sudo add-apt-repository --yes ppa:xqms/opencv-nonfree
sudo apt-get update
sudo apt-get install libopencv-nonfree-dev
i can't run this code, can you help me?
@shabrinarin, if you are working with opencv3.x, you have to remove from line 78 to 88 and add in the same interval the following
cv::Ptrcv::xfeatures2d::SIFT sift;
sift = cv::xfeatures2d::SIFT::create(0,4,0.04,10,1.6);
and change
detector->detect(originalGrayImage, keypoints2); to sift->detect(originalGrayImage, keypoints2);
extractor->compute(grayFrame, keypoints1, descriptors1); to sift->compute(grayFrame, keypoints1, descriptors1);
And, if you are in ubuntu, you can compile the code with the following (If opencv is installed in the default path)
g++ -I/usr/local/include/opencv -I/usr/local/include matching_sift.cpp -o matching_sift.cpp -L/usr/local/lib -lopencv_xfeatures2d -lopencv_highgui -lopencv_core -lopencv_video -lopencv_imgproc -lopencv_features2d -lopencv_imgcodecs
to run the code ./matching_sift img.jpg
can some one send the complete code of SIFT for videos .in open cv c++
if is this is my id alikakar03@gmail.com
can anyone upload the correct code for opencv3.2.0
also what flags do we have to set in project properties after installing the extra modules so that sift features are enabled.
i am getting errors like "identifier is expected " in above code.
@jrojas9206
cv::Ptrcv::xfeatures2d::SIFT sift;
sift = cv::xfeatures2d::SIFT::create(0,4,0.04,10,1.6);
There might be some changes in these lines . i m getting some errors.
For OpenCv 3.2 and above.
Change:
FeatureDetector* detector;
detector = new SiftFeatureDetector(0,4,0.04,10,1.6);
in:
cv::Ptr<cv::xfeatures2d::SIFT> sift;
sift = cv::xfeatures2d::SIFT::create (0,4,0.04,10,1.6);
Delete:
DescriptorExtractor* extractor;
extractor = new SiftDescriptorExtractor();
Change:
detector->detect(originalGrayImage, keypoints2);
extractor->compute(originalGrayImage, keypoints2, descriptors2);
in:
sift->detect (originalGrayImage,keypoints2);
sift->compute (originalGrayImage, keypoints2, descriptors2);
Change:
detector->detect(grayFrame, keypoints1);
extractor->compute(grayFrame, keypoints1, descriptors1);
in:
sift->detect (grayFrame, keypoints1);
sift->compute (grayFrame, keypoints1, descriptors1);
Tested.
error
please hel me
In file included from /usr/local/include/opencv2/nonfree/nonfree.hpp:46:0,
from main.cpp:2:
/usr/local/include/opencv2/nonfree/features2d.hpp:73:21: error: ‘vector’ has not been declared
vector& keypoints) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:73:27: error: expected ‘,’ or ‘...’ before ‘<’ token
vector& keypoints) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:77:21: error: ‘vector’ has not been declared
vector& keypoints,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:77:27: error: expected ‘,’ or ‘...’ before ‘<’ token
vector& keypoints,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:76:10: error: ‘void cv::SIFT::operator()(cv::InputArray, cv::InputArray, int) const’ cannot be overloaded
void operator()(InputArray img, InputArray mask,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:72:10: error: with ‘void cv::SIFT::operator()(cv::InputArray, cv::InputArray, int) const’
void operator()(InputArray img, InputArray mask,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:81:5: error: ‘AlgorithmInfo’ does not name a type
AlgorithmInfo* info() const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:83:49: error: ‘vector’ has not been declared
void buildGaussianPyramid( const Mat& base, vector& pyr, int nOctaves ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:83:55: error: expected ‘,’ or ‘...’ before ‘<’ token
void buildGaussianPyramid( const Mat& base, vector& pyr, int nOctaves ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:84:33: error: ‘vector’ does not name a type
void buildDoGPyramid( const vector& pyr, vector& dogpyr ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:84:39: error: expected ‘,’ or ‘...’ before ‘<’ token
void buildDoGPyramid( const vector& pyr, vector& dogpyr ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:85:39: error: ‘vector’ does not name a type
void findScaleSpaceExtrema( const vector& gauss_pyr, const vector& dog_pyr,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:85:45: error: expected ‘,’ or ‘...’ before ‘<’ token
void findScaleSpaceExtrema( const vector& gauss_pyr, const vector& dog_pyr,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:89:40: error: ‘vector’ has not been declared
void detectImpl( const Mat& image, vector& keypoints, const Mat& mask=Mat() ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:89:46: error: expected ‘,’ or ‘...’ before ‘<’ token
void detectImpl( const Mat& image, vector& keypoints, const Mat& mask=Mat() ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:90:41: error: ‘vector’ has not been declared
void computeImpl( const Mat& image, vector& keypoints, Mat& descriptors ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:90:47: error: expected ‘,’ or ‘...’ before ‘<’ token
void computeImpl( const Mat& image, vector& keypoints, Mat& descriptors ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:125:28: error: ‘vector’ has not been declared
CV_OUT vector& keypoints) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:125:34: error: expected ‘,’ or ‘...’ before ‘<’ token
CV_OUT vector& keypoints) const;
^
In file included from /usr/local/include/opencv2/nonfree/nonfree.hpp:46:0,
from main.cpp:2:
/usr/local/include/opencv2/nonfree/features2d.hpp:128:28: error: ‘vector’ has not been declared
CV_OUT vector& keypoints,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:128:34: error: expected ‘,’ or ‘...’ before ‘<’ token
CV_OUT vector& keypoints,
^
/usr/local/include/opencv2/nonfree/features2d.hpp:127:10: error: ‘void cv::SURF::operator()(cv::InputArray, cv::InputArray, int) const’ cannot be overloaded
void operator()(InputArray img, InputArray mask,
^
In file included from /usr/local/include/opencv2/nonfree/nonfree.hpp:46:0,
from main.cpp:2:
/usr/local/include/opencv2/nonfree/features2d.hpp:124:10: error: with ‘void cv::SURF::operator()(cv::InputArray, cv::InputArray, int) const’
void operator()(InputArray img, InputArray mask,
^
In file included from /usr/local/include/opencv2/nonfree/nonfree.hpp:46:0,
from main.cpp:2:
/usr/local/include/opencv2/nonfree/features2d.hpp:132:5: error: ‘AlgorithmInfo’ does not name a type
AlgorithmInfo* info() const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:142:40: error: ‘vector’ has not been declared
void detectImpl( const Mat& image, vector& keypoints, const Mat& mask=Mat() ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:142:46: error: expected ‘,’ or ‘...’ before ‘<’ token
void detectImpl( const Mat& image, vector& keypoints, const Mat& mask=Mat() ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:143:41: error: ‘vector’ has not been declared
void computeImpl( const Mat& image, vector& keypoints, Mat& descriptors ) const;
^
/usr/local/include/opencv2/nonfree/features2d.hpp:143:47: error: expected ‘,’ or ‘...’ before ‘<’ token
void computeImpl( const Mat& image, vector& keypoints, Mat& descriptors ) const;
^
main.cpp: In function ‘int main(int, char**)’:
main.cpp:78:11: error: ‘xfeatures2d’ is not a member of ‘cv’
cv::Ptrcv::xfeatures2d::SIFT sift;
^
main.cpp:78:11: error: ‘xfeatures2d’ is not a member of ‘cv’
main.cpp:78:32: error: template argument 1 is invalid
cv::Ptrcv::xfeatures2d::SIFT sift;
^
main.cpp:79:14: error: ‘cv::xfeatures2d’ has not been declared
sift = cv::xfeatures2d::SIFT::create(
^
main.cpp:105:47: error: ‘detect’ was not declared in this scope
sift = detect (originalGrayImage, keypoints2);
^
main.cpp:106:62: error: ‘compute’ was not declared in this scope
sift = compute (originalGrayImage, keypoints2, descriptors2);
^
main.cpp:143:11: error: base operand of ‘->’ is not a pointer
sift -> detect (grayFrame, keypoints1);
^
main.cpp:144:11: error: base operand of ‘->’ is not a pointer
sift -> compute (grayFrame, keypoints1, descriptors1);
^
nbproject/Makefile-Debug.mk:72: recipe for target 'build/Debug/GNU-Linux/main.o' failed
make[2]: *** [build/Debug/GNU-Linux/main.o] Error 1
make[2]: Leaving directory '/home/ak/Documents/Data/Panorama Drone SIFT/SIFT-master/Helloword'
nbproject/Makefile-Debug.mk:60: recipe for target '.build-conf' failed
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory '/home/ak/Documents/Data/Panorama Drone SIFT/SIFT-master/Helloword'
nbproject/Makefile-impl.mk:39: recipe for target '.build-impl' failed
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 1s)
How do i compile this