Re: How to locate/track a high intensity laser pointer spot on a live video?

On Mar 12, 12:15 am, D Herring <dherr...@xxxxxxxxxxxxxxxxxxx> wrote:
Albert Goodwill wrote:
Hi,

I want to locate/track a high intensity laser pointer spot on a live
video.

* A web camera with USB interface is connected to a PC running Fedora
Core 5 Linux (and optionally Windows XP pro). The camera is pointed to
a wall which is used as the projection screen.
* One red and one green laser pointers are pointed to the screen at
pseudo random locations. Laser are activated randomly for a duration
of 50-2000 milli second.
* Intensity of the laser pointers' spots are significantly brighter
then the any texture/image on the wall.

I want to locate the laser pointer spots (ie. find the X,Y position of
the laser pointer spots) in image frame and track them at video frame
rate.

I wonder if there is an open-source C/C++ code for Linux (and Windows)
which can locate/track bright spots (option of selecting color would
be even better) on a live color video from a USB web camera?

I wrote a C++ program for tracking color blobs in a webcam stream. It
uses Qt[1] for a GUI and OpenCV[2] for image acquisition. We were
compiling on MSWinXP, but it should be an easy port to linux since all
the libraries are cross-platform.

Subversion repository athttp://androdna.com/pubsvn/compvision/trunk/

- Daniel

[1]http://www.trolltech.com/developer/downloads/qt/index
[2]http://sourceforge.net/projects/opencvlibrary/

Daniel,

THANK YOU very much for your reply and your open source code.
I'm sure I will learn a lot from your codes.
(Do you also have an Win exe to play immediately?)

Regards,

Albert


.

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