rantanplan's profile - activity

To compile the mergevec tool I did the following:

• svn checkout http://tutorial-haartraining.googlecode.com/svn/trunk/HaarTrain ing/ HaarTraining
• edit HaarTraining/src/cvhaartraining.cpp: in line 1814 comment static, i.e. thats the diff with the original file:

 1814c1814
 < static
 ---
 > //static

• in src folder: run make mergevec

@Maria: Thanks for the clarification.

Hi KDS,
you have to create a .vec file from your positives file using the opencv_createsamples tool, e.g.

opencv_createsamples -info positives.dat -num 1000 -vec positives.vec -w 24 -h 24

This would create a positives.vec file from 1000 positve samples listed in positives.dat. The sample width and height are 24. This .vec file is than passed to opencv_traincascade for training. For the negatives you just pass a file containing the file names of your negative samples. For further informations i found this, that, and that good resources. But you've probably found them already...

To create the opencv_createsamples tool you should configure OpenCV with BUILD_EXAMPLES=ON (i think).

Hi darKoram, maybe you should try to break down your long problem into several smaller ones.

To help you with the java installation part of your long problem:

As you already found out Ubuntu no longer ships with sun-java6-jdk, so you have to install it manually. Below you find the instructions to install jdk6

1. Download jdk6 from sun/oracle (I am using jdk1.6.0_33)
2. uncompress the downloaded archive => jdk1.6.0_33
3. mkdir /opt/java/64/
4. sudo mv jdk1.6.0_33/ /opt/java/64/

5. run:
   sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java/64/jdk1.6.0_33/bin/java" 1
   sudo update-alternatives --install "/usr/bin/javac" "javac" "/opt/java/64/jdk1.6.0_33/bin/javac" 1
   sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/opt/java/64/jdk1.6.0_33/bin/javaws" 1
   sudo update-alternatives --install "/usr/bin/javah" "javah" "/opt/java/64/jdk1.6.0_33/bin/javah" 1

6. run:
   sudo update-alternatives --config java
   sudo update-alternatives --config javac
   sudo update-alternatives --config javaws
   sudo update-alternatives --config javah

Conerning your OpenCV installation. I would recommend you to use the latest OpenCV version 2.4.1, download the android(!) package, within you find an OpenCV-2.4.1 and an OpenCV-2.4.1-samples folder. Import the OpenCV-2.4.1 folder to Eclipse via File -> Import -> General -> Existing Projects into Workspace. For the samples, OpenCV-2.4.1-samples, you can do the same and choose which samples to install.

I have compiled OpenCV-2.4.1 with TBB support (-DWITH_TBB=ON) on Ubuntu, which currently ships with TBB 4.0. However when I run opencv_traincascade to train a classifier only one core is used. I've also explicitly checked whether libtbb2 (really is 4.0) is used (/proc/[opencv_traincascade process number]/maps), and it is used. I am using an AMD Athlon 64 X2 Dual Core 4200+ processor.

Is there a way to enforce the usage of 2 or more cores? Or is there a problem with TBB on AMD CPUs?

Update: As I can't comment directly on your answers, so i update my question.

1. Thanks for your answers!
2. @Daniil: I tried checking for HAVE_TBB in traincascade.cpp without success. However, checking my build i found cvconfig.h which actually defines HAVE_TBB. So i believe that the libraries are really build with TBB support. I also checked their symbol table with nm and tbb symbols are there.
3. @Maria: Thats what i was afraid of. However this discussion states that there should be an improvement using TBB.?!