Comments on: Gender detection

By: Andrey Soldatov

Andrey Soldatov — Mon, 25 Jan 2010 05:49:25 +0000

Hi, David, we didn’t use openmp feature in haartraining (as we used slightly modified code with MPI support instead). But as I can see opencv_haartraining (opencv 2.0) has the same support of openmp as haartraining (opencv 1.1).

By: David Nguyen

David Nguyen — Sat, 23 Jan 2010 16:11:28 +0000

Thanks Andrey.

Maybe i should continue working with haartraining 1.1 because it completely support openMP which is still not supported in opencv_traincascade or opencv_haartraining .

By: Andrey Soldatov

Andrey Soldatov — Mon, 18 Jan 2010 02:51:52 +0000

Hi, David,
> It don’t combine automatically, do it.
It actually does it. Just run application with the same parameters and it will read all already built stages. You will see somewhat as “Stage 0 is loaded” if stage 0 results have been saved before. Unfortunately, opencv_traincascade has very bad checks of parameters and error conditions, so if something is wrong with calculations, it may be difficult to understand the reason.

By: David Nguyen

David Nguyen — Sat, 16 Jan 2010 03:44:42 +0000

Thank you for your answering Aleksey.

Could you help me make clear these points ? :

1) As you said, I can interrupt the training process and resume after that. Because It took long time,so i couldn’t wait until the process finish. I only took several cascade (about 6-8).
So, my question is : if I interrupt when process is at about stage of 7 , how can i use the file xml to be generated before? It don’t combine automatically, do it ? ( in this case i mention opencv_traincascade , with opencv_haartraining I know how to do already) .

2) The structure in file xml generated by opencv_traincascade is a little bit weird to me. It differ from the xml was generated by opencv_haartraining. So, Can I use this kind of xml for my old app usings opencv 1.0 ( about compatible ) ?

Thanks in advance. Waiting to hear you soon.

By: Aleksey Kodubets

Aleksey Kodubets — Fri, 15 Jan 2010 12:45:17 +0000

Andrey Soldatov said:

Hi, David. Opencv_haartraining and opencv_traincascade during their work create temporary dirs (haartraining) or files (traincascade) for each stage of the cascade, so you can safely interrupt the process on each stage and then relaunch the program from the last complete step. At the end, they will combine all these dirs/files to one xml file. After that, you may delete all intermediate files. Was it helful?

Andrey Soldatov

By: David Nguyen

David Nguyen — Thu, 14 Jan 2010 17:24:48 +0000

who can help me ? plz.

By: David Nguyen

David Nguyen — Thu, 14 Jan 2010 16:46:55 +0000

Hi everyone.

I want to ask about Opencv_traincascade in opencv2.0.

When i trained the cascade ( i used Haar feature) it generate in cascade folder file .xml seperately for each stage. What should i do with them? . I meant that i should join these files together or leave it so. What tool use to join it if any ?

Thank you every one. Waiting for your answer soon.

By: Computer Vision Software » Blog Archive » FAQ: OpenCV Haartraining

Computer Vision Software » Blog Archive » FAQ: OpenCV Haartraining — Mon, 23 Nov 2009 09:43:45 +0000

[...] could not do it with OpenCV haartraining. That’s why for such classification, we used our own gender and attention classificators. Of course you can use Adaboost for this task, which is implemented in [...]

By: jedota

jedota — Mon, 26 Oct 2009 17:44:50 +0000

when use this parameter with LBP the system crash and open visualstudio

C:\temp2>opencv_traincascade.exe -data data/cascade -vec data/vector.vec -bg neg
ative/infofile.txt -numPos 11 -numNeg 20 -numStages 5 -precalcValBufSize 700 -pr
ecalcIdxBufSize 700 -stageTypes BOOST -featureType LBP -w 24 -h 24 -bt GAB

but when select HAAR the system is ok!! I would like uses LBP system

any hints?

Regards

By: Vasiliy Mun

Vasiliy Mun — Mon, 26 Oct 2009 00:28:02 +0000

Hi jedota, without debug info, I could not help you.