Thursday, February 26th, 2009, 1574 days ago
Combined objects recognition
On this post, i would introduce the latest openCV objects recgnition work for my research. Presently, i have developed codes to recognize circle successfully. Capture image from camera, converting the source image into gray mode, threshold, canny then get the circle numbers and draw the circles, that is it.
However, when turns to rectangle recognition, it seems work right but not so much. Look carefully, there are multilines drawed on one rectangle detected, and the rectangle number displayed on the left side was totally wrong—too much rectangles, that was impossible because as i see that i just put 3 rectangles under the camera. As a result, i was sucked here and couldnt move forward.
If there’s any good idea, welcome to leave a comment or contact me.
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can you please send me the code to detect and track only red color of rectangles in an image from webcam.Thanks.
you can refer the color recognition codes here
can you please send me source code?
I have similar problem
e mail: printf@net.hr
thanks
souce code please refer here:
http://download.andol.info/CombinedObjectsRecognition.cpp
hi Andol, I’ve read your code.
But I don’t really understand the code
double angle( CvPoint* pt1, CvPoint* pt2, CvPoint* pt0 )
{
double dx1 = pt1->x – pt0->x;
double dy1 = pt1->y – pt0->y;
double dx2 = pt2->x – pt0->x;
double dy2 = pt2->y – pt0->y;
return (dx1*dx2 + dy1*dy2)/sqrt((dx1*dx1 + dy1*dy1)*(dx2*dx2 + dy2*dy2) + 1e-10);
}
what mean does the code for ???
thank you so much.^^
@bvhoang this is for calculating the angle between the pt0, pt1 and pt2, just one of the angles between these points.
Dear Andol,
Is it the angle of the square?,
how about if I would like to calculating the angle of the triangle, is it possible if i use this identification.
thank you so much Andol.
sure it is possible as four points of the rectangle have been gained, theoretically it is possible to calculate any angle between these points.
cheers
thank you so much Andol,
At present, I’m taking a thesis with Image Processing.
And I wonder that if you could help me, Problems make me feel so stress
Waiting Andol !!!
DEAR ANDOL
i am doing my project in open cv and i am new here in it.my project is to detect red and blue both colours wearing on fingers of hand and then track their motion and control cursor movement according to that.kindly help me out or email me the regarding codes and especially on red and blue both.thanx
mr.andol…
i have edited your code and it gave accurate number of rectangle.
i just want to ask your permission for using your code for my school project.
thanks.
@Faqih
as long as the code is not used for commercial purpose, it is free to edit and distribute.
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