Installation
From OpenCV on the Cell
This page shows how to install the OpenCV library and the CVCell module. If you succeed installing, run demonstration. Please experience the Cell/B.E..
Steps of a procedure
First of all, please uninstall the OpenCV Library and the CVCell module, if you already have installed them.
- Step 2: Run demonstration
Step 1: Install the OpenCV library and the CVCell module
Get the RPM package from https://sourceforge.net/project/showfiles.php?group_id=204037 .
Exexute as follows. The OpenCV Library and the CVCell module are installed to /opt/cvcell:
$ rpm -ivh opencv-1.0.0-cell.ppc.rpm $ rpm -ivh opencv-1.0.0-cell-devel.ppc.rpm $ rpm -ivh cvcell-0.1.0-1.ppc.rpm $ rpm -ivh cvcell-demo-0.1.0-1.ppc.rpm
Step 2: Run demonstration
Facedetect Sample
This sample is the example which executed the sample program attached to OpenCV. The following figure is an example of the face detection program.
| Output of Facedetect | ||
|---|---|---|
 |
You can set the number of SPE when you run programs if you specify the value of CVCELL_SPENUM environment variable. Please execute as follows:
$ cd /opt/cvcell/bin $ export LD_LIBRARY_PATH=/opt/cvcell/lib:$LD_LIBRARY_PATH $ CVCELL_SPENUM=0 ./facedetect --cascade=../share/opencv/haarcascades/haarcascade_frontalface_alt.xml detection time = 832.045ms
In this case, PPE only was running. The average of detection times is about 840ms.
Please execute the following:
$ CVCELL_SPENUM=6 ./facedetect ---cascade=../share/opencv/haarcascades/haarcascade_frontalface_alt.xml detection time = 102.563ms
In this case, PPE and SPE*6 were running. Compare with the previous detection time. The average of detection times is about 102ms.
The value of CVCELL_SPENUM must be reffered to when the optimized function runs. All applications are made as usual OpenCV applications. It is time when runs the optimized function in there is a modified OpenCV Library and CVCell module.
If you cannot find any changes between previous two results, execute the following. Please execute the second command ls /spu while the program that was executed by the first command is running:
$ ./facedetect ---cascade=../share/opencv/haarcascades/haarcascade_frontalface_alt.xml & $ ls /spu spethread-2349-268517544 spethread-2349-268520704 spethread-2349-268521440 spethread-2349-268520040 spethread-2349-268521368 spethread-2349-268521628
The output shows threads of SPE that is running. As you know, if the program ends, anything doesn't occur even if the second command is executed.
Installation is successful when you can see SPEs were running.
If you are enable to use webcam (See Installing the Webcam), facedetect runs on movie that is captured from webcam. If not, runs on lena.jpg.
