Comments on: Combined objects recognition

By: syed wajahat hussain

syed wajahat hussain — Mon, 02 May 2011 17:50:06 +0000

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

By: bvhoang

bvhoang — Fri, 10 Dec 2010 17:02:01 +0000

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 !!!

By: Andol

Andol — Thu, 09 Dec 2010 19:13:02 +0000

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

By: bvhoang

bvhoang — Thu, 09 Dec 2010 09:58:23 +0000

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.

By: Andol

Andol — Wed, 08 Dec 2010 22:15:17 +0000

@bvhoang this is for calculating the angle between the pt0, pt1 and pt2, just one of the angles between these points.

By: bvhoang

bvhoang — Wed, 08 Dec 2010 16:28:28 +0000

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.^^

By: Andol

Andol — Wed, 27 Jan 2010 15:41:49 +0000

souce code please refer here: http://download.andol.info/CombinedObjectsRecognition.cpp

By: tomek

tomek — Wed, 27 Jan 2010 13:06:05 +0000

can you please send me source code?
I have similar problem
e mail: printf@net.hr
thanks

By: Andol

Andol — Thu, 25 Jun 2009 07:43:25 +0000

you can refer the color recognition codes here

By: a.elen

a.elen — Thu, 25 Jun 2009 03:01:22 +0000

can you please send me the code to detect and track only red color of rectangles in an image from webcam.Thanks.