About opencv 3.0 with TBB and IPP

asked 2014-09-26 21:11:19 -0600

Dear Friends,

Yesterday,I found opencv_world300.dll in the folder of named build. It was very good and very convenient. But I wanted to use opencv3.0 with TBB and IPP. I rebuilt opencv3.0 using camke and vs2010. I found ippicv_windows_20140429.zip was bad file,so couldn't rebuilt it with IPP. I didn't know why?

Then,I asked our local author of writting opencv's books,he told me never rebuilt it and asked me to search library of including TBB and IPP.

Following were my questions: 1.is there a installation package of including TBB and IPP in opencv.org ? Do I really need not rebuilt it ? 2.If opencv need be rebuilt,how to solution ippicv_windows_20140429.zip problem?

Thank you very much! Best Regards.

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answered 2014-09-27 10:19:38 -0600

tuannhtn

1500 ●10 ●19 http://4fire.wordpress...

AFAIK, the prebuilt OpenCV 3.0.0-alpha was built with IPP 8.1.1 enable (this is a compact version for OpenCV only, not the full version, see more at link1) but not TBB. TBB is for boosting OpenCV algorithm by parallel mechanism by employing the multicores architecture. So it is depend on your requirement, if you need for speed, than rebuilding with TBB enable is a good choice.
The problem you got with ippicv_windows_20140429.zip was due to the fact that the cmake program could not download it correctly and then it failed to unzip it (in OpenCV 3.0.0, the option with IPP is default as it is really efficient) for building OpenCV. The solutions are simple: you can delete it (the file ippicv_windows_20140429.zip) and rerun cmake and it will download the file from internet, or you can download it manually from this link and then replace the wrong version, then rerun cmake again.

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Also let me add that an advice of never rebuilding opencv is the worst I have heard in a long time. Prebuilt packages always contain tons of bugs that are not yet fixed. I urge people to download the latest stable 2.4 branch from github and build that locally. Those configurations will always outperform prebuilt packages.

StevenPuttemans ( 2014-09-29 06:32:55 -0600 )edit

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answered 2015-03-12 22:01:34 -0600

aolin.wang
6 ●1

In opencv3.0.0 beta, i saw a option of build world libray.I like it. I found my problem was only happened in my PC. Following was my solution: 1.Can't download ippicv---download it from web, i think it is company firewall problem. 2.Unzip file error --- in my home,the second time was okay using Cmake,but my office was not. my way was compress file to tar format, then get md5, then alter downloader.cmake file elseif(WIN32 AND NOT ARM) set(OPENCV_ICV_PACKAGE_NAME "ippicv_windows_20141027.tar") set(OPENCV_ICV_PACKAGE_HASH "f6511e273c71594cbf57856f0d4d4f5e") set(OPENCV_ICV_PLATFORM "windows") set(OPENCV_ICV_PACKAGE_SUBDIR "/ippicv_win")

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