Comments on: Fun with Python, OpenCV and face detection http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/ Fri, 05 Dec 2008 16:12:28 +0000 http://wordpress.org/?v=2.6.2 By: Jo Vermeulen http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-166 Jo Vermeulen Fri, 17 Oct 2008 14:29:44 +0000 http://blog.jozilla.net/?p=144#comment-166 You're welcome, I'm glad it was useful for you. You're welcome, I'm glad it was useful for you.

]]> By: randomm http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-165 randomm Fri, 17 Oct 2008 14:26:26 +0000 http://blog.jozilla.net/?p=144#comment-165 this is great stuff! thanks for this...<br><br>We managed to get up to 4 faces recognized at the same time. this is great stuff! thanks for this…

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

]]> By: Jo Vermeulen http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-164 Jo Vermeulen Sun, 12 Oct 2008 12:25:30 +0000 http://blog.jozilla.net/?p=144#comment-164 Ah thanks, that's very helpful! Ah thanks, that's very helpful!

]]> By: Jhon http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-162 Jhon Thu, 25 Sep 2008 19:18:10 +0000 http://blog.jozilla.net/?p=144#comment-162 I figured it out how to properly use cvWaitKey.<br><br>In your code you are waiting just 10 ms for a key, and only after the image was processed.<br>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.<br><br>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:<br>if k!=-1 and ord(k) == 0x1b: # ESC<br> print 'ESC pressed. Exiting ...'<br> break 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) == 0×1b: # ESC
print 'ESC pressed. Exiting …'
break

]]> By: daxroc http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-126 daxroc Wed, 02 Jul 2008 21:09:37 +0000 http://blog.jozilla.net/?p=144#comment-126 Nice script , worked fine for me @30fps Nice script , worked fine for me @30fps

]]> By: Jo Vermeulen http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-125 Jo Vermeulen Tue, 01 Jul 2008 06:34:30 +0000 http://blog.jozilla.net/?p=144#comment-125 You are right, I noticed yesterday that the cascade file was part of OpenCV. Thanks for clarifying! You are right, I noticed yesterday that the cascade file was part of OpenCV. Thanks for clarifying!

]]> By: Nirav Patel http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-124 Nirav Patel Tue, 01 Jul 2008 02:57:52 +0000 http://blog.jozilla.net/?p=144#comment-124 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).<br><br>Its good that you got it working though. There is some pretty amazing stuff in OpenCV. 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.

]]> By: Jo Vermeulen http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-123 Jo Vermeulen Sat, 28 Jun 2008 15:53:20 +0000 http://blog.jozilla.net/?p=144#comment-123 You're welcome! I'm glad you find it useful. You're welcome! I'm glad you find it useful.

]]> By: Si http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-122 Si Sat, 28 Jun 2008 13:09:03 +0000 http://blog.jozilla.net/?p=144#comment-122 excellent stuff. Many thanks excellent stuff. Many thanks

]]> By: In Traction » Blog Archive » Small update on face detection post http://blog.jozilla.net/2008/06/27/fun-with-python-opencv-and-face-detection/#comment-119 In Traction » Blog Archive » Small update on face detection post Fri, 27 Jun 2008 19:03:35 +0000 http://blog.jozilla.net/?p=144#comment-119 [...] Blog « Fun with Python, OpenCV and face detection [...] [...] Blog « Fun with Python, OpenCV and face detection [...]

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