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Hi,
I'm using ipp 8.2 and I'm trying to compile FilterGaussianBorder.c sample but no chance:
gcc gaussian.c -o test -I /opt/intel/ipp/include -L /opt/intel/ipp/lib/intel64 -lippcv -lippvm -lippi -lipps -lippcore libippcv.a(ipcvsift_y8---ippiFilterGaussianInit.o): In function `y8_ippiFilterGaussianInit': ipcvsift.c:(.text+0x1ad): undefined reference to `exp'
I found that ippiFilterGaussianInit function needs ippcv.lib and not ippvm.lib as mentioned in the documentation.
Which libraries I missing to get it compiled?
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Hi Sascha,
IPP 8.x depends on Intel compiler run-time libraries - you should and libm and libirc to link cmd. IPP 9.x doesn't have such dependency.
Regards, Igor
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Hi Igor,
I installed IPP 9.0.1.150 but it still not working:
ipcvsift.c:(.text+0x1c0): undefined reference to `exp'
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Ok, it works with both IPP 8.2 and IPP9.0
just add libm to the linker.
Thanks.
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Hi Igor,
how to use gaussian filter on 4 channels image?
I found it in the deprecated list:
ippiFilterGauss_8u_C4R -> ippiCopy_C4C1R +ippiFilterGaussianBorder_8u_C1R
what does it mean? Should I do gauss filter twice?
1x with ippiFilterGaussianBorder_8u_C3R
1x with ippiFilterGaussianBorder_8u_C1R
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Hi Sascha,
Yes, your workaround
1x with ippiFilterGaussianBorder_8u_C3R
1x with ippiFilterGaussianBorder_8u_C1R
should work fine.
and the recommendation ippiCopy_C4C1R +ippiFilterGaussianBorder_8u_C1R , which may require call 4 times, work also.
Basically as the 4 channel image gaussian filter was deprecated, you can use either of them.
Best Regards,
Ying H.
Intel IPP Support

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