Compiling Program with OpenCV on BeagleBone Ubuntu

[rbriggin]

I have a beaglebone running ubuntu 11.10 headless using the images supplied here

http://elinux.org/BeagleBoardUbuntu

Ive been trying to compile the program below, its taken from one of the OpenCV samples and modified a bit to just save the captured images instead of displaying them in a window.

http://pastebin.com/3CtTVk0Z

I have all of the packages associated with OpenCV installed and this is the output from

pkg-config --cflags --libs opencv

-I/usr/include/opencv  -lml -lcvaux -lhighgui -lcv -lcxcore 

 When i compile the program using...

gcc -I/usr/include/opencv -L/usr/lib -lhighgui opencv_cap.c

I get the output listed here

http://pastebin.com/HyS7WH6C

 I can compile this same program using the same gcc line on my main computer and it runs fine.  I have no idea how or where something is going amiss and was wondering if anyone has had a similar issue or any insight on how to resolve this problem?

Thanks

-Brandon

[Dave Hylands]

Hi Brandon,

On Thu, Jan 5, 2012 at 1:29 PM, rbriggin <rbri...@gmail.com> wrote:
> I have a beaglebone running ubuntu 11.10 headless using the images supplied
> here
> http://elinux.org/BeagleBoardUbuntu
>
> Ive been trying to compile the program below, its taken from one of the
> OpenCV samples and modified a bit to just save the captured images instead
> of displaying them in a window.
> http://pastebin.com/3CtTVk0Z
>
> I have all of the packages associated with OpenCV installed and this is the
> output from
>>
>> pkg-config --cflags --libs opencv
>>
>> -I/usr/include/opencv  -lml -lcvaux -lhighgui -lcv -lcxcore
>
>
>  When i compile the program using...
>>
>> gcc -I/usr/include/opencv -L/usr/lib -lhighgui opencv_cap.c
>
>
> I get the output listed here
> http://pastebin.com/HyS7WH6C

Any particular reason you dropped the -lml, -lcvaux, -lcv and -lcxcore options?

I expect that one of those libraries contains the missing symbols.

Note: I haven't used OpenCV before, so I'm just basing my comments on
the errors you showed.

--
Dave Hylands
Shuswap, BC, Canada
http://www.davehylands.com

[rbriggin]

Yes there is a reason, they are not needed for the test program i have (at least i think).

influenced by http://linuxconfig.org/introduction-to-computer-vision-with-opencv-on-linux

The one i listed above is the bare essentials for this to "work" on my desktop, compiling with 

gcc -I/usr/include/opencv  -lml -lcvaux -lhighgui -lcv -lcxcore -L/usr/lib opencv_cap.c

yields the same results. (also added -L/usr/lib)

-Brandon

[rbriggin]

Also relevant, here is the out put from

ls -lah /usr/lib/libcv*
-rw-r--r-- 1 root root 3.4M 2011-09-15 01:19 /usr/lib/libcv.a
-rw-r--r-- 1 root root 1.9M 2011-09-15 01:19 /usr/lib/libcvaux.a
lrwxrwxrwx 1 root root   15 2011-09-15 01:18 /usr/lib/libcvaux.so -> libcvaux.so.2.1
lrwxrwxrwx 1 root root   17 2011-09-15 01:18 /usr/lib/libcvaux.so.2.1 -> libcvaux.so.2.1.0
-rw-r--r-- 1 root root 702K 2011-09-15 01:19 /usr/lib/libcvaux.so.2.1.0
lrwxrwxrwx 1 root root   12 2011-09-15 01:18 /usr/lib/libcv.so -> libcv.so.2.1
lrwxrwxrwx 1 root root   14 2011-09-15 01:18 /usr/lib/libcv.so.2.1 -> libcv.so.2.1.0
-rw-r--r-- 1 root root 1.6M 2011-09-15 01:19 /usr/lib/libcv.so.2.1.0

and 

ls -lah /usr/include/opencv/
total 1000K
drwxr-xr-x  2 root root 4.0K 2012-01-05 14:56 .
drwxr-xr-x 50 root root 4.0K 2012-01-05 14:56 ..
-rw-r--r--  1 root root  65K 2010-04-05 20:24 cvaux.h
-rw-r--r--  1 root root  67K 2010-04-05 20:24 cvaux.hpp
-rw-r--r--  1 root root  40K 2010-04-05 20:24 cvcompat.h
-rw-r--r--  1 root root  71K 2010-04-05 20:24 cv.h
-rw-r--r--  1 root root  46K 2010-04-05 20:24 cv.hpp
-rw-r--r--  1 root root 6.0K 2011-09-14 23:53 cvinternal.h
-rw-r--r--  1 root root  12K 2010-04-05 20:24 cvtypes.h
-rw-r--r--  1 root root 2.5K 2010-04-05 20:24 cvver.h
-rw-r--r--  1 root root  42K 2010-04-05 20:24 cvvidsurv.hpp
-rw-r--r--  1 root root  21K 2010-04-05 20:24 cvwimage.h
-rw-r--r--  1 root root  76K 2010-04-05 20:24 cxcore.h
-rw-r--r--  1 root root  82K 2011-09-14 23:53 cxcore.hpp
-rw-r--r--  1 root root 8.6K 2010-04-05 20:24 cxerror.h
-rw-r--r--  1 root root 6.8K 2010-04-05 20:24 cxflann.h
-rw-r--r--  1 root root 150K 2010-04-05 20:24 cxmat.hpp
-rw-r--r--  1 root root  28K 2010-04-05 20:24 cxmisc.h
-rw-r--r--  1 root root  89K 2010-04-05 20:24 cxoperations.hpp
-rw-r--r--  1 root root  52K 2010-04-05 20:24 cxtypes.h
-rw-r--r--  1 root root  19K 2010-04-05 20:24 highgui.h
-rw-r--r--  1 root root 4.8K 2010-04-05 20:24 highgui.hpp
-rw-r--r--  1 root root  72K 2010-04-05 20:24 ml.h

Everything seems to be there and in order, im really stumped on this one.

[Jake]

Do you get the same error if you compile using this command 

gcc `pkg-config --cflags --libs opencv` -o my-opencv-prgm my-opencv-prgm.c

from here?

http://opencv.willowgarage.com/wiki/CompileOpenCVUsingLinux

Also, I tested a very similar program with OpenCV 2.1 last year, and it looks like I needed to include the header cv.h.

(I remember running into a similar problem, but it was a while ago and still trying to recall...)

Jake

[rbriggin]

Tried that, same result.  

Including the cv.h header makes just makes gcc list all of the cv.h functions as unable to reference like the the ones in highgui.h

[rbriggin]

Well I dont know what the problem was with ubuntu but I installed debian and it worked like a charm.

For the interested http://elinux.org/BeagleBoardDebian will get debian up and running.

It might have just been me but when i updated the kernel as listed here http://elinux.org/BeagleBoardDebian#Beagleboard:_Install_Latest_Kernel the board wouldnt boot.

If you want to give it a shot and the kernel update borks your install, on the boot partition you'll see to files with "_old" on the end (uboot_old and uimage_old, i think, dont quote me on that)

Rename those back to the default names (overwriting the files that are there) and you'll be good to go.

After that its a matter of doing the usual house keeping, update, upgrade, install sudo and gcc, and then the opencv libs and you're compiling.

Any questions let me know, the details are kind of fuzzy since i dont have the board in front of me right now

[Robert Nelson]

On Sat, Jan 7, 2012 at 10:11 PM, rbriggin <rbri...@gmail.com> wrote:
> Well I dont know what the problem was with ubuntu but I installed debian and
> it worked like a charm.
> For the interested http://elinux.org/BeagleBoardDebian will get debian up
> and running.
>
> It might have just been me but when i updated the kernel as listed
> here http://elinux.org/BeagleBoardDebian#Beagleboard:_Install_Latest_Kernel the
> board wouldnt boot.

By chance, do you remember which version failed? That update method
is a rolling release, and right now it's on the v3.1.x's, I usually
catch regressions pretty quick

> If you want to give it a shot and the kernel update borks your install, on
> the boot partition you'll see to files with "_old" on the end (uboot_old and
> uimage_old, i think, dont quote me on that)
> Rename those back to the default names (overwriting the files that are
> there) and you'll be good to go.

Correct, the install-me.sh update scripts will backup your previous
uImage/uInitrd..

> After that its a matter of doing the usual house keeping, update, upgrade,
> install sudo and gcc, and then the opencv libs and you're compiling.
>
> Any questions let me know, the details are kind of fuzzy since i dont have
> the board in front of me right now
>

Regards,

--
Robert Nelson
http://www.rcn-ee.com/

[rbriggin]

linux-image-3.1.8-x7_1.0squeeze_armel

[Robert Nelson]

On Sun, Jan 8, 2012 at 10:42 AM, rbriggin <rbri...@gmail.com> wrote:
> linux-image-3.1.8-x7_1.0squeeze_armel

Works for me on my xM B.. (so what board?)

btw, after you run the "Netinstall" there's no point of updating to
the latest kernel, since the NetInstall pulls in the exact same kernel
(well that day anyways). ;)

[rbriggin]

Sorry, this is on a beagle bone.

I didn't know that it was an optional step, going through the install procedure it says that its not installing a kernel, so i figured it needed to be done.  Learning experience i guess.

The kernel that i have running on it is the 3.1.0-psp3.

Ill try it again some time in the next few days (classes start tomorrow) and see if it was just a fluke,  it would sit at the "starting kernel" (i think) message and then nothing.

[Robert Nelson]

Ah, sorry my bad.. I tweaked that section, for special BeagleBone considerations

http://elinux.org/BeagleBoardDebian#Beagleboard:_Install_Latest_Kernel

Currently the BeagleBone has to use a different kernel then the
beagle/panda/etc.. ;)

Should change in the future, maybe v3.3?

[Jake]

I made some progress on this problem, not sure if you still care...

I used netbeans on my PC to build the above sample program with the OpenCV libraries added to the project properties.  The sample program then builds just fine.  However, executing the command(s) at a terminal fails as you stated:

gcc `pkg-config --cflags --libs opencv` -o my-opencv-prgm my-opencv-prgm.c

Building this way fails on BOTH pandaboard and PC with Ubuntu.  BUT, splitting the gcc command into 2 separate calls (just as Netbeans does) the program builds successfully:

gcc    -c -g -I/usr/local/include/opencv -MMD -MP -MF build/main.o.d -o build/camtest.o cam-ex.c

gcc     -o dist/camtest build/camtest.o -L/usr/local/lib -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_gpu -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_objdetect -lopencv_ts -lopencv_video

I'm not sure why....but hopefully that gives you some insight...

Jake