Mark an object in real time on a displayed video acquired from an USB camera

Hello,
I am a beginner LabView user undertaking a project in which I need to show video acquired from an USB camera in LabView on computer screen. In the video, there will be a metal part, which is always be at a fixed position at the bottom left of the view. I need to mark an arrow alike sign on the metal part, please take a look at the attached picture. To recognize the metal part easier, in the picture, I drew a blue line at the boundary of the part, whilst the arrow was green. The arrow must be radially pointed to the center of the blue line (but, the blue line may not need to be created) and must be there every time I start the VI, throughout the video.
How should I do to display the video? Is there any way to create the arrow in LabView (either by programming or manually drawing the arrow)? If making the arrow is impossible, is there any way to just mark a cross at the center of the blue line? The blue line does not need to be marked on the video.
I have LabView 2010 with Vision Development Module. My camera can be found under NI IMAQdx devices in Measurement and Automation Explorer.
Thanks,
LePhuong
Solved!
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Attachments:
A fixed arrow mark on the metal part.jpg ‏26 KB

Hi,
Look at this post. It may help you. http://forums.ni.com/t5/Machine-Vision/pattern-matching-program/m-p/1914589#M34855. In here its video signal you can replace this with the live video.
Sasi.
Certified LabVIEW Associate Developer
If you can DREAM it, You can DO it - Walt Disney

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Go to Solution.

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# Contributor: Leandro Chescotta <[email protected]>
pkgname=sndpeek
pkgver=1.3
pkgrel=1
pkgdesc="real-time audio visualization"
arch=('i686' 'x86_64')
url="http://soundlab.cs.princeton.edu/software/sndpeek/"
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==> Checking Runtime Dependencies...
==> Checking Buildtime Dependencies...
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PKGBUILD: line 16: ./configure: No such file or directory
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RtAudio.cpp:234: error: 'sprintf' was not declared in this scope
RtAudio.cpp:239: error: 'sprintf' was not declared in this scope
RtAudio.cpp:244: error: 'sprintf' was not declared in this scope
RtAudio.cpp:250: error: 'sprintf' was not declared in this scope
RtAudio.cpp:257: error: 'sprintf' was not declared in this scope
RtAudio.cpp:339: error: 'sprintf' was not declared in this scope
RtAudio.cpp:341: error: 'sprintf' was not declared in this scope
RtAudio.cpp: In member function 'RtAudioDeviceInfo RtApi::getDeviceInfo(int)':
RtAudio.cpp:355: error: 'sprintf' was not declared in this scope
make[1]: *** [RtAudio.o] Error 1
make[1]: Leaving directory `/home/aleyscha/bin/arch_packages/sndpeek/src/sndpeek-1.3/src/sndpeek'
make: [linux-alsa] Error 2 (ignored)
cp /usr/local/bin/; chmod 755 /usr/local/bin/
cp: missing destination file operand after `/usr/local/bin/'
Try `cp --help' for more information.
==> Tidying install...
-> Compressing man pages...
-> Stripping debugging symbols from binaries and libraries...
==> Creating package...
-> Generating .PKGINFO file...
-> Compressing package...
==> Leaving fakeroot environment.
==> Finished making: sndpeek 1.3-1 i686 (Fri May 15 22:15:50 ART 2009)
Press any key to continue...
[aleyscha@aleyscha 52 sndpeek 22:15]$

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Mark an object in real time on a displayed video acquired from an USB camera

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