Face Detection with Adaboost using Matlab
in [Matlab]
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From: kmlee on 21 Aug 2005 04:51 Hello to all Recently, Hamed Masnadi-Shirazi released his Matlab source for Face Detection using Adaboost as part of an assignment. I have taken the code and modified it quite a bit. But importantly, optimized to run 30 times faster. I have some interesting observations with which I'd like some discussion / collaboration with. I've tried looking at other boosting / machine learning boards, but they look rather deserted. For example, this code runs like the blazes in Matlab 6.1 but about four times slower in 6.5.1. When training to find the optimal threshold, at times it would select the feature with the highest threshold. But there doesn't seem to be anything wrong with the algorithm/data. Please reply here or at the "cleaned up - ie remove all CAPS" version of my email address. Thanks in advance.
From: SeBy on 21 Aug 2005 09:28 kmlee wrote: > > > Hello to all > > Recently, Hamed Masnadi-Shirazi released his Matlab source for Face > Detection using Adaboost as part of an assignment. I have taken the > code and modified it quite a bit. But importantly, optimized to run > 30 times faster. > > I have some interesting observations with which I'd like some > discussion / collaboration with. > > I've tried looking at other boosting / machine learning boards, but > they look rather deserted. > > For example, this code runs like the blazes in Matlab 6.1 but about > four times slower in 6.5.1. > > When training to find the optimal threshold, at times it would > select > the feature with the highest threshold. But there doesn't seem to > be > anything wrong with the algorithm/data. > > Please reply here or at the "cleaned up - ie remove all CAPS" > version > of my email address. > > Thanks in advance. Why not make a submission to FEX ? (File EXchange). Personaly I would be interrested. Regards, Sýbastien
From: Vicente on 21 Aug 2005 12:42 SeBy wrote: > kmlee wrote: > >> >>Hello to all >> >>Recently, Hamed Masnadi-Shirazi released his Matlab source for Face >>Detection using Adaboost as part of an assignment. I have taken the >>code and modified it quite a bit. But importantly, optimized to run >>30 times faster. >> >>I have some interesting observations with which I'd like some >>discussion / collaboration with. >> >>I've tried looking at other boosting / machine learning boards, but >>they look rather deserted. >> >>For example, this code runs like the blazes in Matlab 6.1 but about >>four times slower in 6.5.1. >> >>When training to find the optimal threshold, at times it would >>select >>the feature with the highest threshold. But there doesn't seem to >>be >>anything wrong with the algorithm/data. >> >>Please reply here or at the "cleaned up - ie remove all CAPS" >>version >>of my email address. >> >>Thanks in advance. > > > Why not make a submission to FEX ? (File EXchange). Personaly I would > be interrested. > > Regards, > > Sýbastien me too. Vicente Moreno.
From: kmlee on 21 Aug 2005 22:06 Hi to all SNIP > > Why not make a submission to FEX ? (File EXchange). Personaly I > would > be interrested. > > Regards, > > Sýbastien I don't think the code is ready to be posted. I need more discussion on the results and testing. A fresh perspective would help greatly! Regards,
From: Steven Lord on 22 Aug 2005 09:22
"kmlee" <kmleeAT(a)emailDOT.com> wrote in message news:ef11a17.-1(a)webx.raydaftYaTP... > Hello to all > > Recently, Hamed Masnadi-Shirazi released his Matlab source for Face > Detection using Adaboost as part of an assignment. I have taken the > code and modified it quite a bit. But importantly, optimized to run > 30 times faster. > > I have some interesting observations with which I'd like some > discussion / collaboration with. > > I've tried looking at other boosting / machine learning boards, but > they look rather deserted. > > For example, this code runs like the blazes in Matlab 6.1 but about > four times slower in 6.5.1. Try profiling the code in both MATLAB 6.1 and 6.5.1, then look at what section of the code took the longest in 6.5.1 or what slowed down the most between the two MATLAB releases. If you need help figuring out a way to improve the performance of that section, I'm sure the regular readers would be happy to offer suggestions. -- Steve Lord slord(a)mathworks.com |