Re: [Scikit-learn-general] Finding dimentions of faces on an image

2013-03-19 Thread Andreas Mueller
On 03/19/2013 01:55 PM, Fimi wrote: Hi Brian, I will look into this paper in more detail. Thank you for your reply. If I have to use opencv or other wrappers like it that hide SVM behind its interface I will not use it. The purpose of this small project is to learn Support Vector Machines. Su

Re: [Scikit-learn-general] Finding dimentions of faces on an image

2013-03-19 Thread Fimi
From: Brian Holt To: scikit-learn-general@lists.sourceforge.net Sent: Tuesday, March 19, 2013 4:03:26 AM Subject: Re: [Scikit-learn-general] Finding dimentions of faces on an image As Gilles says, the scanning windows approach is pretty common for object (and face) detection. Have

Re: [Scikit-learn-general] Finding dimentions of faces on an image

2013-03-19 Thread Fimi
2013 3:49:27 AM Subject: Re: [Scikit-learn-general] Finding dimentions of faces on an image Hi, Short answer: you cant. Longer answer: If you use as training samples the whole images (with faces somewhere in there), then your model is learning to discriminate between your 2 categories, from t

Re: [Scikit-learn-general] Finding dimentions of faces on an image

2013-03-19 Thread Andreas Mueller
Hi Fimi. Is there a reason you are not using the Viola-Jones implemented in OpenCV? I should be available in SimpleCV, too, if you want a nice Python interface. Cheers, Andy On 03/19/2013 05:19 AM, Fimi wrote: Hello, I've got non linear multiclass classification for support vector machines to

Re: [Scikit-learn-general] Finding dimentions of faces on an image

2013-03-19 Thread Brian Holt
As Gilles says, the scanning windows approach is pretty common for object (and face) detection. Have you looked at the Viola Jones paper? It's the standard for face detection and now that we have adaboost classifiers you should be able to knock up an example quite quickly. Scikit Image might be qui

Re: [Scikit-learn-general] Finding dimentions of faces on an image

2013-03-19 Thread Gilles Louppe
Hi, Short answer: you cant. Longer answer: If you use as training samples the whole images (with faces somewhere in there), then your model is learning to discriminate between your 2 categories, from the whole images, with **no** information about where the faces are actually located. As such, it

[Scikit-learn-general] Finding dimentions of faces on an image

2013-03-18 Thread Fimi
Hello, I've got non linear multiclass classification for support vector machines to work and it does predict the correct face and non face images. It has been a very steep learning curve for me because this is the first time I do this type of work. I would like to see if you can guide me on a go