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POHoughCircles OpenCV
 

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  1. POHoughCircles OpenCV
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    <p>I am writing code for detecting a blue color round object with HSV color space in OpenCV, the program can also move the mouse pointer with the help of object. I was implementing the HoughCircles function in my code but it was not executing. This is the code:</p> <pre><code> #include "cv.h" #include "highgui.h" #include &lt;iostream&gt; #include &lt;windows.h&gt; using namespace cv; using namespace std; int main() { VideoCapture cap(0); if(!cap.isOpened()) return -1; Mat vd,copy,imgScribble; namedWindow("Video",1); namedWindow("Capture",1); int width = GetSystemMetrics(SM_CXSCREEN); int height = GetSystemMetrics(SM_CYSCREEN); int ww = cap.get(CV_CAP_PROP_FRAME_WIDTH); int wh = cap.get(CV_CAP_PROP_FRAME_HEIGHT); double adjw = width/ww; double adjh = height/wh; int h = 640 * adjh; int w = 320 * adjw; for(;;) { cap&gt;&gt;vd; GaussianBlur( vd, vd, Size(9, 9), 2, 2 ); cvtColor(vd,copy,CV_RGB2HSV); Mat thresh; inRange(copy,Scalar(0,200,0),Scalar(13,255, 255),thresh); flip(thresh,thresh,1); Moments mom = moments(thresh); double moment10 = mom.m10; double moment01 = mom.m01; double area = mom.m00; static int posX = 0; static int posY = 0; int lastX = posX; int lastY = posY; posX = moment10/area; posY = moment01/area; h = posX * 2.134375; w = posY * 2.4; vector&lt;Vec3f&gt; circles; HoughCircles(vd,circles,CV_HOUGH_GRADIENT,2,vd.rows/4,100,100,0,0); if(area &gt;= 1000) { SetCursorPos(h,w); } cout&lt;&lt;height&lt;&lt;"x"&lt;&lt;width&lt;&lt;endl; cout&lt;&lt;h&lt;&lt;"xx"&lt;&lt;w&lt;&lt;endl; imshow("Capture",vd); imshow("Video",thresh); if(waitKey(30) &gt;= 0) break; } cap.release(); return 0; } </code></pre> <p>Please find me the solution for HoughCircles? Thanks in advance.</p>
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    1. USRahul
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    1. COwhat is the problem? compilation error or incorrect result?
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      1. POHoughCircles OpenCV
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    2. COAn error is occurred while executing this code, the line where the error is taking place is : `HoughCircles(vd,circles,CV_HOUGH_GRADIENT,2,vd.rows/4,100,100,0,0);` I don't know whats wrong in there.
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    3. COI got the solution as I was not using the gray level based image in HoughCircles's 1st parameter!
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      1. USRahul
 

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