Comments on: Face Detection in Static Images with Python

By: facesaver.py locks your screen when you forget « wilkox

facesaver.py locks your screen when you forget « wilkox — Tue, 31 Aug 2010 07:44:34 +0000

[...] to be added to the list. A large part of the code is stolen directly from Marty McGuire’s face_detect.py. This is the first thing I’ve ever written in python so feel free to suggest improvements. [...]

By: Alexander F

Alexander F — Wed, 02 Jun 2010 09:12:22 +0000

Hi! I have the thingy running on windows but maybe this can help you:
• Add /bin to your PATH environment variable
• Create an environment variable PYTHONPATH and set it to /Python2.6/Lib/site-packages

adapt it to your versions/directories/operating systems needs.

By: Guenter Bachelier

Guenter Bachelier — Sun, 16 May 2010 16:32:56 +0000

I have just installed OpenCV 2.1 on Ubuntu with
http://gijs.pythonic.nl/blog/2010/apr/7/opencv-21-ubuntu-packages/
and tried this code but I get a
ImportError: No module named opencv.cv

By: Alexander F.

Alexander F. — Tue, 27 Apr 2010 04:49:03 +0000

Hi! Anyone an idea how this works on windows? i get the “ImportError: No module named opencv.cv” Error using python 26 and opencv 2.1. copying the files from “C:\OpenCV2.1\Python2.6\Lib\site-packages” to “C:\Python26\Lib\site-packages” as said everywhere on the internet doesn’t seem to work. best regards, alex

By: Robert McGuire

Robert McGuire — Thu, 21 Jan 2010 17:21:37 +0000

Marius – have you tried ryanhaigh’s suggestion of changing the “if faces:” line to “if faces.total > 0:”?

By: marius

marius — Thu, 21 Jan 2010 14:01:46 +0000

Hi, I get an error when running this script:

$ ./face_detect.py lena.jpg
terminate called after throwing an instance of ‘int’
Aborted
$ _

The same happens when running this from the python shell. When copy-pasting single lines, the error appears at “faces = cvHaarDetectObjects(…)”. The shell is also killed. I don’t even have a guess on where to start looking here. Any ideas on what goes wrong?

By: ryanhaigh

ryanhaigh — Sat, 22 Aug 2009 09:30:49 +0000

Thanks for this information it was very useful to me. I did however have a problem when using this in a larger program and I thought others might find it useful. It seems that “if faces:” will still be true even if no faces are found in the image. Using “if faces.total > 0:” worked perfectly.

Thanks Again,
ryanhaigh

By: Anony M.

Anony M. — Mon, 18 May 2009 23:09:48 +0000

Thank you very much indeed, sir.

By: Dom

Dom — Tue, 05 May 2009 11:24:17 +0000

p.s. tested and working with the ISO standard CV http://en.wikipedia.org/wiki/Lenna test image

By: Dom

Dom — Tue, 05 May 2009 11:21:32 +0000

Thanks for this example!

FYI, /usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml is contained in libcv-dev so you actually need to install that too for the code to run

i.e.,

$ sudo apt-get install python-opencv libcv-dev