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Yaw Mensah

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Yaw Mensah last won the day on December 8 2020

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About Yaw Mensah

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LabVIEW Information

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    LabVIEW 2020
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  1. There is an example application that acquires an image and streams it to the display. With minor changes i could send those images to the pipe.
  2. I want to write a c application the acquire images send it to the pipe. On the orther side of the pipe, i would than use the read.vi to read the images in labview.
  3. I am trying to read images from my Gige camera, but on LabView Linux Imaqdx is not available. So i tried wrapping the vendors Gige implementation. But i had some problems regarding passing handles and the callback function to receive the images. If someone have experience regarding image- aquisition without imaqdx or know a different way, i would be grateful for your suggestions.
  4. Is it possible to call a static library in Labview, without calling it through a shared library? Thank you in advance for your replies.
  5. Thanks for all your suggestion and the recommended references. Due to your help i was able to make a wrapper for some function in opencv 3.2. It is possible to use both c and c++ elements. Just needed to handle the name mangling and compile with a c++ compiler. Thank you all very much.
  6. Thank you very much. Do you know a reference targeting Labview on linux for this matter. Wouldn´t i avoid this whole mess by only using an Opencv version with a c api?
  7. Does anyone know the exact version when opencv droped the c api.
  8. Calling a function or use of a datatype from <opencv2/opencv.hpp> result in a name mangling or undefined variable issues.
  9. I'm using labview on Linux, which does not support dotnet. So EmguCv is not an option. I thought about only using the C API in opencv to avoid name mangling and undefined variables issues, but the later version of opencv doesn't support C API. i'm now stuck at figuring out how to call the c++ function in a c calling conventtion. example code: #include <stdio.h> #include <opencv2/opencv.hpp> using namespace cv; using namespace std; extern "C"{ int displayimage() { Mat image(400,400, CV_8UC3, Scalar(0,0,255)); image = imre
  10. I am trying to create to shared library with opencv to acess a picture. I have no experience on this topic. If anyone have a referece or example-code that can help me develope an understanding i would be very thankful. Rigth now i have created a shared libray to display a picture. But i get the error that Mat variable is not defined when it is called in labview. I will be thankful for any suggestions.
  11. Thank you very much. Call Library Function Node doesn't change the name and calls the fuctions as desired.
  12. I have created a simple shared library with an add function. When I try to call it with the Call Library Function Node, it always change the name, e.g. add() to Z2addii(). In the Error is always the same error. Call Library Function Node 'libtestshared.so.Z2addii: not found in library. When i change the functionname in the shared library to Z2addii the Call Library Function Node then calls the Z3Z2addiiii. But when i compiler a c-programm which uses the shared library i get the desired output. I will be grateful for suggestions.
  13. It works now. In Addition to installing everything i needed libxinerama1:i386 und libgl1:i386. Those two can be installed with apt-get install. Thank you for your suggestions.
  14. Is there a way to convert the 32-Bit rpm to deb so they can installed?
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