Comments on: Fun with Python, OpenCV and face detection

By: TechB

TechB — Thu, 11 Mar 2010 22:28:25 +0000

After about a week of work, I couldn't get opencv to work. I used VideoCapture again, and fdlib.dll to detect the faces. http://www.kyb.mpg.de/bs/people/kienzle/facedem…;

By: TechB

TechB — Tue, 02 Mar 2010 13:00:50 +0000

Hey great post. I can't wait to get started hacking it to my needs. I made a script that tracts an IR LED and maps the mouse to the movements(http://hackaday.com/2010/02/25/python-ir-tracking-for-the-handicapped/).

I used VideoCapture(http://videocapture.sourceforge.net/) for the webcam interface though. I'm going to try and map the mouse movements to this new face-recognition.

By: Jo Vermeulen

Jo Vermeulen — Wed, 20 Jan 2010 19:33:07 +0000

You're welcome!

By: auttapong

auttapong — Wed, 20 Jan 2010 19:31:19 +0000

thank you very much Jo ^^

By: Jo Vermeulen

Jo Vermeulen — Wed, 20 Jan 2010 16:11:10 +0000

I currently don't have a Linux machine for testing, but IIRC the line

cascade = cv.LoadHaarClassifierCascade('haarcascade_frontalface_alt.xml', cv.Size(1,1))

requires the cascade file to be in the same directory as the script.

By the way, the script I presented in this blog post won't work on Windows. You should use the simple_winclient.py script for that (which can be found in the tarball available from my website).

By: auttapong

auttapong — Wed, 20 Jan 2010 15:58:42 +0000

C:DevOpenCVdatahaarcascades

By: Jo Vermeulen

Jo Vermeulen — Wed, 20 Jan 2010 15:48:45 +0000

Are you sure you have the cascade file in the same directory?

By: auttapong

auttapong — Wed, 20 Jan 2010 14:59:13 +0000

hi. i have this
Null pointer (Invalid classifier cascade)
in function cvHaarDetectObjects,
C:UserVPoperncvcvsrccvhaar.cpp(890)

By: Jo Vermeulen

Jo Vermeulen — Wed, 20 Jan 2010 13:33:07 +0000

You're welcome!

By: auttapong

auttapong — Wed, 20 Jan 2010 13:31:19 +0000

thank you very much Jo ^^