I'm new to opencv, i use the c++ package. I used the code in the tutorial to detect an known object in the picture. Now I need to find the size of the object in pixels. I just need the number of pixels of his height and width in the pic (not the actual size). I couldn't find something that will help me.. is there a way to do it?
@lp, You are trying to detect a known object, what i understands from this line is, You must be using a already trained cascade classifier to detect the known objects in a given image :
vector<Rect> faces;
// here we are trying to detect number of faces
FaceCascadeClassifier.detectMultiScale(image, faces, 1.1, 1, 0|CV_HAAR_SCALE_IMAGE, Size(20, 20));
cout<<"no of found faces :" <<faces.size();
for (int i = 0; i < faces.size(); i++)
{
Rect r = faces[i];
printf("a face is found at Rect(%d,%d,%d,%d).\n", r.x, r.y, r.width, r.height);
}
kindly try to find such code in your code and look at width and height parameters i am printing, and i think this is what you want. Dot.
@lp. Does this will help u? number of pixels of his height and width in the pic
Asked: 2014-01-11 07:22:41 -0600
Seen: 1,189 times
Last updated: Feb 09 '18
We need more information than that. What have you done so far? Do you have bounding rectangles? If so you can easily check the size of the bounding rectangles. Width and height are members of the rect class.
could put your code, that will help us to help you