LabVIEW and C code

[Oesen]

Hi

I'm working on a project, where I have to capture images from an external USB cam with NI-IMAQdx and export them as 10 frames/sec (10 arrays/sec). The problem is that, my group member on this project, has to capture those 10 array/sec using C-language from me. Is there any method in LabVIEW to export 10 arrays/sec into a C-code ?. If not, is there an another method I can use ?

Thanks in advance

[JKSH]

Hi,

If you have Application Builder, you can compile your LabVIEW code into a DLL and call that from your C program: https://www.ni.com/en/shop/labview/can-labview-c-.html

[Oesen]

Thanks for the reply JKSH

Do you know whether it is possible to export data to a DLL continuously ?

[JKSH]

Yes. Your C program will just have to call the relevant LabVIEW subVI (function) continuously.

Alternatively, you can compile your C program into a DLL and make LabVIEW call a C function continuously for image processing.

Be aware though that the maximum frame rate you can achieve will depend on the size of your frames and the speed of your processor.

[Oesen]

Doh.. My university doesn't have a license for Application Builder. What about exporting my arrays to a .csv file continuously and capture the data from that file with C ?

[Ranjeet_Singh]

Yes you can do that, but synchronizing the data between read and write will be an issue, Take precaution there

[Oesen]

We're talking about exactly this add-on ?. If yes, then it is installed and activated

 

[JKSH]

Yes, it looks like you have the required license 🙂

I don't recommend exporting to .csv files if you need to transfer 10 frames per second (that's very fast, so it's difficult to synchronize). DLLs will be more reliable.

[MarcoMauri]

Hi!

A second option could be to stream the data via TPC/IP.

Your Labview program could act as a server, the C program as a client connecting to a server and receiving the stream.

Regards,

Marco

[Oesen]

Hi Marco. But I still need to translate it to C ?