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

Re: Fun with Python, OpenCV and face detection

jozilla — Fri, 13 Nov 2009 08:06:02 -0000

You should install OpenCV first, and try to run the simple_winclient.py script. The software is available at my website.

Re: Fun with Python, OpenCV and face detection

njay — Fri, 13 Nov 2009 01:35:17 -0000

hey!! i am nj here, i am trying to execute this program on windows I am getting following error. I saw a post with same thing, where u said u will be releasing new version so that it works on windows. Is it not released yet?

Re: Fun with Python, OpenCV and face detection

club penguin cheats — Wed, 04 Nov 2009 10:25:23 -0000

this is awesome, i have been wanting to do this with python for awhile now. great stuff.

Re: Fun with Python, OpenCV and face detection

jozilla — Fri, 30 Oct 2009 07:39:17 -0000

The script uses Gary Bishop's CVtypes, not python-opencv.

Re: Fun with Python, OpenCV and face detection

online games — Wed, 23 Sep 2009 18:23:41 -0000

I'm still having trouble with the escape key. Any tips?

Re: Fun with Python, OpenCV and face detection

cyril84 — Mon, 14 Sep 2009 16:10:43 -0000

I have do sudo apt-get install python-opencv. It is already installed. What can i do?

Re: Fun with Python, OpenCV and face detection

cyril84 — Mon, 14 Sep 2009 16:08:10 -0000

Hello, i have this:

Traceback (most recent call last):
File "opencv.py", line 2, in <module>
from CVtypes import cv
ImportError: No module named CVtypes

What is this mistake? how install cvtypes?

Thinks

Re: Fun with Python, OpenCV and face detection

nop — Sun, 13 Sep 2009 08:39:25 -0000

In synaptic you can fing python-opencv

Re: Fun with Python, OpenCV and face detection

nop — Sun, 13 Sep 2009 08:26:26 -0000

yes, 9.04

Re: Fun with Python, OpenCV and face detection

cyril — Fri, 11 Sep 2009 13:00:39 -0000

Hello, i try your code but i have this:

cyril@zilo2:~/Bureau/test$ sudo python webcam2.py
Traceback (most recent call last):
File "webcam2.py", line 3, in <module>
from CVtypes import cv
ImportError: No module named CVtypes

i use ubuntu, how cab i install opencv? sudo apt-get install ?

Thinks @+

Re: Fun with Python, OpenCV and face detection

sreeraj — Thu, 27 Aug 2009 14:00:26 -0000

hi, i'm having this problem when i'm running your code..

i have an integrated camera on my laptop, which works with some apps like cheese.

while running this code, the camera(led) turns on, but nothing comes on the screen.
the script hangs and i have to ctrl+C to close it.

any pointers to help me with this situation will be appreciated.
thanks

Re: Fun with Python, OpenCV and face detection

ClubPenguinCheats — Thu, 20 Aug 2009 20:32:55 -0000

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).

Re: Fun with Python, OpenCV and face detection

jozilla — Mon, 10 Aug 2009 08:23:45 -0000

It might be good to use a specific GUI toolkit in this case, such as WxWindows.

Have a look at Gary Bishop's blog post, where he grabs a bitmap from the camera and displays this in a Wx window: http://wwwx.cs.unc.edu/~gb/wp/blog/2007/02/04/p...

Re: Fun with Python, OpenCV and face detection

jozilla — Mon, 10 Aug 2009 08:22:07 -0000

Are you using Ubuntu?

Re: Fun with Python, OpenCV and face detection

nop — Sun, 09 Aug 2009 03:36:00 -0000

Hello!
Your if script silently hangs on this line for me:
cascade = cv.LoadHaarClassifierCascade('haarcascade_frontalface_alt.xml', cv.Size(1,1))

What can be the problem here? This xml exists in same directory and the is no any error output.

Thanks in advance!

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!