Hi everybody ! I want to create a trackbar to change the value of argument in inRange() function. I realize that everytime I change Scalar in this function and debug, it takes many times. I want to create a trackbar to change Scalar when I'm debugging . Can everyone help me about this problem ? Thanks very much
int red = 17; // initial value
int grn = 1; // initial value
int blu = 27; // initial value
namedWindow("thewindow");
createTrackbar("red", "thewindow", &red, 255);
createTrackbar("grn", "thewindow", &grn, 255);
createTrackbar("blu", "thewindow", &blu, 255);
// ...
// later,
// ...
Mat img, bin;
Scalar lower(red,grn,blu);
Scalar upper(200,100,50);
inRange(img,lower,upper,bin);
@berak I used trackbar to find out the suitable argument for Houghcircle function and then draw right circle cover my object, but everytime I change value of trackbar then I can't change the circle was drew in the previous time. Here is my code : createTrackbar("min_dist_px","Window",&min_dist_px,255); createTrackbar("canny_threshold","Window",&canny_threshold,255); createTrackbar("acc_threshold","Window",&acc_threshold,255); createTrackbar("min_radius","Window",&min_radius,255); createTrackbar("max_dist_px","Window",&max_radius,255);
vector<Vec3f> circles;
HoughCircles(dst,circles,CV_HOUGH_GRADIENT,
1, // dp
min_dist_px, // min_dist_px
canny_threshold, // higher canny
acc_threshold, // acc threshold
min_radius, // min radius
max_radius);
I think I must use the trackbar change event to solve this problem but I don't know how to use this trackbar event. Can you help me about this problem ? Have a great day
sorry this is my mother language :) It means the image after finding out right circle
Asked: 2014-09-13 03:52:32 -0600
Seen: 432 times
Last updated: Sep 13 '14
