GPU Coder Error with OpenCV

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Alvaro Izaguirre Serrano
Alvaro Izaguirre Serrano 2020년 3월 6일
댓글: Rodrigo Botelho 2022년 7월 31일
I'm trying to use the example "Semantic Segmentation on NVIDIA DRIVE" just modifying it to be executing on a Jetson Nano board. I train my own network, then Ijust load my network instead of the one defined on the example, nevertheless when I try to deploy it to the Nano I have the following error:
/main.cu:10:10: fatal error: opencv2/opencv.hpp: No such file or directory
#include "opencv2/opencv.hpp"
I check on the nano to see if the installation of OpenCV is correct:
alvaro@alvaro-nano:~$ pkg-config --modversion opencv
2.4.9
The installation is correct, also when I call the code generation I pass the path as an -I command:
codegen -config cfg autoSemanticSegmentation -args {img} -I /usr/include/opencv4 -report -v
And I saw that this is inluded on the generated make file.
How can I fix this issue to be able to compile and execute the example on the Nano?
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이전 댓글 2개 표시
Walter Roberson
Walter Roberson 2020년 3월 11일
alvaro@alvaro-nano:~$ pkg-config --modversion opencv
opencv pkg is not the same as openvc2 pkg. opencv still exists as a package
Alvaro Izaguirre Serrano
Alvaro Izaguirre Serrano 2020년 3월 11일
yes, actually I work with opencv4 and now I'm able to compile

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Hariprasad Ravishankar
Hariprasad Ravishankar 2020년 3월 9일
Hi Alvaro,
I believe the issue is due to the line below,
cfg.CustomInclude = fullfile('/usr/include/opencv4');
For hardware deployment workflow, cfg.CustomInclude prepends the host working directory structure to create the following structure
-I/home/alvaro/remoteBuildDir/MATLAB_ws/R2019b/usr/include/opencv4
-I/home/alvaro/remoteBuildDir/MATLAB_ws/R2019b/usr/include/opencv4/opencv2
Rather than,
-I/usr/include/opencv4
-I/usr/include/opencv4/opencv2
To resolve the issue you can try one of the two approaches
1) Rename /usr/include/opencv4/opencv2 to /usr/include/opencv2
mv /usr/include/opencv4/opencv2 /usr/include/opencv2
This should ensure that the compiler is able to find opencv2/opencv.hpp under /usr/include/
2) Use coder.updateBuildInfo('addIncludePaths', '/usr/include/opencv4/');
function out = segnet_predict(in)
%#codegen
% A persistent object mynet is used to load the DAG network object.
% At the first call to this function, the persistent object is constructed and
% setup. When the function is called subsequent times, the same object is reused
% to call predict on inputs, thus avoiding reconstructing and reloading the
% network object.
% Update buildinfo with the OpenCV library flags.
opencv_link_flags = '`pkg-config --cflags --libs opencv`';
coder.updateBuildInfo('addLinkFlags',opencv_link_flags);
coder.updateBuildInfo('addIncludePaths', '/usr/include/opencv4/');
persistent mynet;
if isempty(mynet)
mynet = coder.loadDeepLearningNetwork('SegNet.mat');
end
% pass in input
out = predict(mynet,in);
Hari
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이전 댓글 11개 표시
Hariprasad Ravishankar
Hariprasad Ravishankar 2020년 3월 16일
Hi David,
Thats good to know. We will look into updating the example to work with opencv4 in a future release.
Hari
Rodrigo Botelho
Rodrigo Botelho 2022년 7월 31일
Hi, Hariprasad,
I'm trying the Segnet demo from the Support Package, but I'm running into the same problem with opencv4.
I've tried the seuggestion no.2, but I'm getting the same error.
Any udpates on how to use this demo with Opencv4?
rcbb

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