Generate a xml file: error with createsamples

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Hey there. Can you please let us know if you are able to run other samples like facedetect, etc.?

Hey, I search for some facedetect files and I found one which is called facedetect.cmd, so I opened cmd.exe and run : facedetect.cmd --cascade="../../data/haarcascades/haarcascade_frontalface_alt.xml" --nested-cascade="../../data/haarcascades/haarcascade_eye.xml" --scale=1.3 %1

Something happened but I stopped it (^C) because it was always the same things : C:\cygwin\tmp\opencv-2.4.5\samples\c>facedetect --cascade="../../data/haarcascades/haarcascade_frontalface_alt.xml" --nested-cascade="../../data/haarcascades/haarcascade_eye.xml" --scale=1.3 %1 --cascade

C:\cygwin\tmp\opencv-2.4.5\samples\c>REM an example of using haar cascade recognition for face and eye detection

I think I don't answer to your question but I don't know what you mean by "samples like facedetect". I have 5 executable files in cygwin/usr/local/bin directory which are opencv_createsamples.exe opencv_haartraining.exe opencv_mergevec.exe (that I added) opencv_performance.exe opencv_trainascade.exe

Do you mean, that I can try to run one of this .exe file on Cygwin ?

In the folder C:\cygwin\tmp\opencv-2.4.5\samples\c\, there will be a file facedetect.cpp. Try compiling it. ( If you have specified the 'build all examples' flag when you built OpenCV, you will find a facedetect.exe (or) a c-example-facedetect.exe in the bin or somewhere. Search for it.) Try running it. It is just to make sure your OpenCV and its utilities are built properly.

So, I have a file facedetect.cpp but no file facedetect.exe. Just in case, I have followed this kind of website to build my version of opencv on Cygwin : http://hvrl.ics.keio.ac.jp/kimura/opencv/ (but for my versions, I cannot find the website link).

So, i'm trying to compile it with this two commands : $ export PKG_CONFIG_PATH=../../../../../usr/local/lib/pkgconfig/ $ g++ pkg-config --cflags opencvpkg-config --libs opencv -o facedetect facedetect.cpp

And I have these kind of errors : /tmp/cctiJam4.o:facedetect.cpp:(.text+0x1f2): undefined reference to cv::CascadeClassifier::CascadeClassifier()'

I know that I probably forget something like linking libraries to compile facedetect.cpp but I thought my first command line with 'export' was enough.

I assume that the quote mark ( ' ) at the end of your previous comment (cv::CascadeClassifier::CascadeClassifier()') was a mistake. All I wanted to know was whether your opencv has been built correctly or not as these errors can come because of that too. Try compiling and executing some other program and test if opencv works.

pkg-config takes care of all the linking provided its used correctly. Verify whether the path is set by using : echo $PKG_CONFIG_PATH command in terminal.

For compiling, g++ -o facedetect facedetect.cpp pkg-config --cflags --libs opencv

So if I used : echo $PKG_CONFIG_PATH, I received : ../../../../usr/local/lib/pkgconfig/. I think the path is good but if I'm trying to compile with your command, I have :

g++: error: pkg-config: No such file or directory

g++: error: unrecognized command line option ‘--cflags’

g++: error: unrecognized command line option ‘--libs’

g++: error: opencv: No such file or directory

And, so it didn't seem ok. When I export PKG_CONFIG_PATH, I should give the path where is opencv.pc?

I am really sorry, there are back quote marks (below tilde symbol) marks before and after pkg-config. So the command is g++ -o facedetect facedetect.cpp(back quote)pkg-config --cflags --libs opencv(back quote)` My bad.

And why do u need relative path for PKG_CONFIG_PATH? Use absolute path of opencv.pc in export command.

Also this time, I have first using absolute path of opencv.pc

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/

And then, I tried

$ g++ pkg-config --cflags --libs opencv -o facedetect facedetect.cpp

And I received :

/tmp/cce6bQUu.o:facedetect.cpp:(.text+0x1f2): undefined reference to cv::CascadeClassifier::CascadeClassifier()' /tmp/cce6bQUu.o:facedetect.cpp:(.text+0x200): undefined reference tocv::CascadeClassifier::CascadeClassifier()' /tmp/cce6bQUu.o:facedetect.cpp:(.text+0x3d2): undefined reference to `cv::CascadeClassifier::load(std::string const&)'

...

It seems, indeed I have a problem with the installation of opencv.. Do you have any idea to fix it?

So, I have reinstalled openCV, a more recent version 2.4.6, on Cygwin. I didn't resolve the problem for the undefined reference to IID_ISpecifyPropertyPages (see the post below), I just did again what I explain on the post.

Even if I have still the same problem using opencv_createsamples, this time I succeed to create facedetect.exe. And so, I tried to use it :

./facedetect --cascade="../../data/haarcascades/haarcascade_frontalface_alt.xml" --nested-cascade="../../data/haarcascades/haarcascade_eye.xml" --scale=1.3 1a000.pgm

But I'm not sure about the result, a window "result" opened and closed. Should I see something on it? Because it's not the case.