I'm using Opencv 3.0 c++.I have been able to find the COG of an irregular object but now I need to translate the ROI to the COG of the image,that is to make it in the center.
Any suggestions how to do it?
if topleft corner (M) of ROI is (xr,yr) in orignal image (origin O) and gravity center (G) of contour is(xg,yg) in roi coordinates then gravity center coordinates in orignal image is (xr+xg,yr+yg).
or
if topleft corner of ROI is (xr,yr) in orignal image and gravity center of contour is(xg,yg) in image coordinates then gravity center coordinates in roi is (-xr+xg,-yr+yg).
OM+MG=OG
If you want to move all points belonging to a contour :
Point d(100,200);// translate vector d
for (int i=0;i<contour.size();i++
contour[i] += d;
I have been using the following code:
//Translate the ROI to the COG of the image
int x;
if (COG.x > center.x)
{
x = COG.x - center.x;
x = -x;
}
else
{
x = (COG.x - center.x)*-1;
}
int y;
if (COG.y < center.y)
{
y = center.y - COG.y;
}
else
{
y = center.y - COG.y;
}
But still no output.The object is not being positioned at the center. Did i made any mistake for the translation?
Asked: 2017-01-22 06:53:53 -0600
Seen: 933 times
Last updated: Jan 23 '17