In Traction - Latest Comments in Fun with Python, OpenCV and face detection

Re: Fun with Python, OpenCV and face detection

gabox — Sat, 30 May 2009 19:15:26 -0000

hi i want to put the window's webcam in other program both under python, but i dont how to do it, the project is a program with bottons and they controll a robot and the robot get the webcam, by the way im using linux mint 6

Re: Fun with Python, OpenCV and face detection

Simon — Thu, 08 Jan 2009 21:26:28 -0000

Hello, Sir
I'm from Asia. I'm just starting to learn openCV.
Is there any opinion or advise from Sir as an expert to me to start learning opencv

Thank you very much.

Re: Fun with Python, OpenCV and face detection

jozilla — Mon, 05 Jan 2009 04:38:15 -0000

You need to have OpenCV installed. I guess that is the problem. I didn't try it on Windows yet since there's no D-BUS support, but in theory the face detection code should work.

I will probably release a first version of the code in the following weeks, so stay tuned!

Re: Fun with Python, OpenCV and face detection

Venkat — Sun, 04 Jan 2009 15:32:16 -0000

When I tried runing the above code in windows xp, encountered the following error.

D:\SW\CamFD>python test2.py
Traceback (most recent call last):
File "test2.py", line 2, in <module>
from CVtypes import cv
File "D:\SW\CamFD\CVtypes.py", line 42, in <module>
_cxDLL = cdll.cxcore100
File "C:\Python25\lib\ctypes\__init__.py", line 423, in __getattr__
dll = self._dlltype(name)
File "C:\Python25\lib\ctypes\__init__.py", line 348, in __init__
self._handle = _dlopen(self._name, mode)
WindowsError: [Error 126] The specified module could not be found

Any help regarding this will be great!

Re: Fun with Python, OpenCV and face detection

jozilla — Fri, 17 Oct 2008 09:29:44 -0000

You're welcome, I'm glad it was useful for you.

Re: Fun with Python, OpenCV and face detection

randomm — Fri, 17 Oct 2008 09:26:26 -0000

this is great stuff! thanks for this...

We managed to get up to 4 faces recognized at the same time.

Re: Fun with Python, OpenCV and face detection

jozilla — Sun, 12 Oct 2008 07:25:30 -0000

Ah thanks, that's very helpful!

Re: Fun with Python, OpenCV and face detection

Jhon — Thu, 25 Sep 2008 14:18:10 -0000

I figured it out how to properly use cvWaitKey.

In your code you are waiting just 10 ms for a key, and only after the image was processed.
So, if you wait a little bit longer(maybe 100ms, but this will slow down a lot the fps) you will be able to catch the keys.

However, there is also another problem cvWaitKey returns -1 when no key was pressed, but return a string(char) holding the key pressed, so you need to do the following:
if k!=-1 and ord(k) == 0x1b: # ESC
print 'ESC pressed. Exiting ...'
break

Re: Fun with Python, OpenCV and face detection

daxroc — Wed, 02 Jul 2008 16:09:37 -0000

Nice script , worked fine for me @30fps

Re: Fun with Python, OpenCV and face detection

jozilla — Tue, 01 Jul 2008 01:34:30 -0000

You are right, I noticed yesterday that the cascade file was part of OpenCV. Thanks for clarifying!

Re: Fun with Python, OpenCV and face detection

Nirav Patel — Mon, 30 Jun 2008 21:57:52 -0000

Just to clarify, the Haar cascade file is one of the sample ones that comes with OpenCV. The script I wrote was based on the OpenCV face detection sample too, but using gstreamer instead of OpenCV's HighGUI to interface the webcam (HighGUI didn't support the camera in the XO).

Its good that you got it working though. There is some pretty amazing stuff in OpenCV.

Re: Fun with Python, OpenCV and face detection

jozilla — Sat, 28 Jun 2008 10:53:20 -0000

You're welcome! I'm glad you find it useful.

Re: Fun with Python, OpenCV and face detection

Si — Sat, 28 Jun 2008 08:09:03 -0000

excellent stuff. Many thanks