How I can draw the contour of MSER regions which I have detected ? //detect MSER regions,Ellipse fitting of MSER regions,draw contour of MSER region//

include <opencv2 opencv.hpp="">

int main(int argc, char *argv[]) { Mat box = imread("box.png",1); MSER ms; vector<vector<point>> regions; ms(box, regions, Mat()); for (int i = 0; i < regions.size(); i++) { ellipse(box, fitEllipse(regions[i]), Scalar(255)); } imshow("mser", box); waitKey(0); return 0; } //Next step I try to draw irregular contour of MSER regions which have been detected by the above code. This step I write code as follow:

int main(int argc, char *argv[]) { Mat box = imread("box.png",1); MSER ms; vector<vector<point>> regions; ms(box, regions, Mat()); for (int i = 0; i < regions.size(); i++) { ellipse(box, fitEllipse(regions[i]), Scalar(255)); drawContours(box,regions,i,Scalar(0,255,255),1,8);//this was used to draw //irregular outlines of MSER regions
} imshow("mser", box); waitKey(0); return 0; } The result of above code show that the irregular interiors of MSER regions are drawn. But, I just need draw irregular contour(outline) of MSER regions, not interiors, how I need use the function of drawContours, what should I do?

a kind friend,imran,recommmend me use the function drawcontour like this: drawContours(box,regions,i,Scalar(0,255,255),1,8, vector<vec4i>(), 0, Point());//this was used to draw irregular outlines of MSER regions However,it still show that the function draws the contour(s) and all the nested contours,I just want draw contour,not nested contours,so it does not work. I do not know whether I have explain my problem clear?

I encounter a problem that I need to upload images to describe what is counter of MSER regions?

Toward to fusion of images,a friend(Michael Burdinov)who recommend me to used stitching function,but I just start to learn Opencv,as a result I would not use stitching functions,so nay friend would give me an example?

You know that the registration is about a pair of image was superimposed on the other image based on a perspective transformation model,or it is equivalent to the image fusion. Now I used the function of findHomography,but I don"t know what should be do next? Any friend would like to help me?

You know that the registration is about a pair of image was superimposed on the other image based on a perspective transformation model,or it is equivalent to the image fusion. Now I used the function of findHomography,but I don"t know what should be do next? Any friend would like to help me?

And would any friend give me an example about regiatration of images? To make the work,I have do some preparation, I write code as follow:

   void main( ) 
{
    // Load images
Mat imgA = imread("E:\\picture\\Bimg1.jpg", CV_LOAD_IMAGE_GRAYSCALE);
Mat imgB = imread("E:\\picture\\Bimg4.jpg", CV_LOAD_IMAGE_GRAYSCALE );
std::vector<KeyPoint> keypointsA, keypointsB;
Mat descriptorsA, descriptorsB;
std::vector<DMatch> matches;

// DETECTION
SurfFeatureDetector detector(3000);
    //DESCRIPTOR    
FREAK extractor(true, true, 22, 4, std::vector<int>());
     BruteForceMatcher<Hamming> matcher;
detector.detect( imgA, keypointsA );
detector.detect( imgB, keypointsB );
extractor.compute( imgA, keypointsA, descriptorsA );
extractor.compute( imgB, keypointsB, descriptorsB );
     matcher.match(descriptorsA, descriptorsB, matches);

}

You know that follow the code above we could get corespondent points,the problem is that I couldn"t make registration of images.How to do the further work? I want to make fusion of images based on homography matrix .

How I can draw the contour of MSER regions which I have detected ? //detect MSER regions,Ellipse fitting of MSER regions,draw contour of MSER region//

int main(int argc, char *argv[]) {

Mat box = imread("box.png",1);
MSER ms;
vector<vector<Point>> regions;
ms(box, regions, Mat());
for (int i = 0; i < regions.size(); i++)
{
    ellipse(box, fitEllipse(regions[i]), Scalar(255));
}
imshow("mser", box);
waitKey(0);
return 0;

}

//Next step I try to draw irregular contour of MSER regions which have been detected by the above code. This step I write code as follow://

int main(int argc, char *argv[]) {

Mat box = imread("box.png",1);
MSER ms;
vector<vector<Point>> regions;
ms(box, regions, Mat());
for (int i = 0; i < regions.size(); i++)
{
    ellipse(box, fitEllipse(regions[i]), Scalar(255));
    drawContours(box,regions,i,Scalar(0,255,255),1,8);//this was used to draw
    //irregular  outlines of MSER regions  
}
imshow("mser", box);
waitKey(0);
return 0;

}

The result of above code show that the irregular interiors of MSER regions are drawn. But, I just need draw irregular contour(outline) of MSER regions, not interiors, how I need use the function of drawContours, what should I do?

a kind friend, imran, recommmend me use the function drawcontour like this:

drawContours(box,regions,i,Scalar(0,255,255),1,8, vector<vec4i>(), 0, Point());//this was used to draw irregular outlines of MSER regions//

However,it still show that the function draws the contour(s) and all the nested contours, I just want draw contour, not nested contours,so it does not work. I do not know whether I have explain my problem clear?

I have detected MSER regions as follows(Thanks a lot for Alexander Shishkov's help!)

#include <opencv2/opencv.hpp>
int main(int argc, char *argv[])
{
    Mat box = imread("box.png",1);
    MSER ms;
    vector<vector<Point>> regions;
    ms(box, regions, Mat());
    for (int i = 0; i < regions.size(); i++)
    {
        ellipse(box, fitEllipse(regions[i]), Scalar(255));
    }
    imshow("mser", box);
    waitKey(0);
    return 0;
}

Next step I try to draw irregular outlines of MSER regions which have been detected by the above code. This step I write code as follow:

int main(int argc, char *argv[])
{
    Mat box = imread("box.png",1);
    MSER ms;
    vector<vector<Point>> regions;
    ms(box, regions, Mat());
    for (int i = 0; i < regions.size(); i++)
    {
        ellipse(box, fitEllipse(regions[i]), Scalar(255));
        drawContours(box,regions,i,Scalar(0,255,255),1,8);//this was used to draw
        //irregular  outlines of MSER regions  
    }
    imshow("mser", box);
    waitKey(0);
    return 0;
}

The result of above code show that the irregular interiors of MSER regions are drawn. But, I just need draw irregular outlines of MSER regions, not interiors, how I need use the function of drawContours, what should I do?

We know that MSER(Maximally stable extremal region)was to detect affine regions between stereo images(http://en.wikipedia.org/wiki/Maximallystableextremal_regions).I just could get points(x pixel coordinate and y pixel coordinate) using MserFeatureDetector,However，I extremmely like to get region parameters besides points,such format: u(pixel coordinate x ),v(pixel coordinate y),a,b,c(a,b and c are affine region parameters),ellipse would be drawn by a,b and c.Is any friend would help me to solve the problem?

I detect Keypoints by detector,such as MSER or Surf.I need to write these Keypoints into document(Txt format).But, What should I do?

I detect Keypoints by detector,such as MSER or Surf.I need to write these Keypoints into document(Txt format).But, What should I do?