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OpenCV 4.5 simple optical flow GPU tutorial cuda::FarnebackOpticalFlow

This OpenCV tutorial is a very simple code example of GPU Cuda optical flow in OpenCV written in c++. The configuration of the project, code, and explanation are included for farneback Optical Flow method. Farneback algorithm is a dense method that is used to process all the pixels in the given image. The dense methods are slower but more accurate as all the pixels of the image are processed. In the following example, I am displaying just a few pixes based on a grid. I am not displaying all the pixes. In the opposite to dense method the sparse method like Lucas Kanade using just a selected subset of pixels. They are faster. Both methods have specific applications. Lucas-Kanade is widely used in tracking. The farneback can be used for the analysis of more complex movement in image scene and furder segmentation based on these changes. As dense methods are slightly slower, the GPU and Cuda implementation can lead to great performance improvements to calculate optical flow for all pixels o
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Simple Install opencv Visual Studio 2017 by NUGET

Simple Installation opencv Visual Studio 2017

Simple installation of opencv for Visual studio 2017 by image example. Easy and fast way to start coding in opencv by Nuget packages. If your plan is going to use cuda, or some advanced opencv settings. You should install opencv in different way. For example build your own libs according to HW you have available.. This will be my next tutorial.

If you want to play and make a fun in Visual Studio 2017 this is tutorial for you. All mine tutorials for Opencv is now running just based on NUGET packages installation. For most common purpose is this installation just fine.

OPENCV VISUAL STUDIO 2017 need vs141 libs version

This doesn't make any sense to me Visual Studio 2012 was 110 lib version, 2013 was 113, Visual studio 2015 has VS140 lib version and now the big step forward. Visual studio 2017 you are finding DLL, libs etc compatible with VS141.. What a big step from previous visual studio :)

Instal opencv under 1 minute 

On nuget package side find nuget distribution. This will install library, DLL and header just into your project. Find the right NUGET for you on https://www.nuget.org/packages

Find support VS141
openCV for Windows
320.1.1-vs141

I just try this nuget and It works fine for 86 version build in VS 2017.
Install-Package opencv.win.native -Pre
x86/x64 builds for OpenCV 3.2 release for Visual Studio 2017

Install Step by step

  • Create empty C++ project
  • Click on source file on Right and add new source.cpp file. 
  • Add source code. You will see unresolved dependencies and other staff. Just because your functions try to find where are they implemented.  


opencv nuget visual studio 2017


  • Your Visual Studio 2017 needs NUGET packages extension installed. The installation of VS17 is more modular than before, but NUGET are most common extension. 
  • In tools - Nuget Packages Manager - open Package Manager Console
  • Write here simple Install-Package opencv.win.native -Pre     OR any others you find 
  • On second picture you can see that Nuget is installed 


Now, You can compile at least 86 released without any problem. I am tested just this packages. The next tutorial show how to build your own libraries.. See you




Troubles with opencv  ZLIBD1.DLL zlib dll in some nuget packages

Hi, all friends with zlibd1.dll troubles. This NuGet package has some trouble with debug and project needs to switch to release. As in the last picture above. Look at the proof down here. All instruction above are ok. You can find nugets package that correct this problem and install in same way..  Thanks. 


DEBUG




RELEASE




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Comments

  1. UnknownMay 8, 2017 at 9:57 AM

    Hey,

    tnx for this tutorial. I have a bit of problem with it. When I am trying to show an image, calling namedWindow & imshow, I get error on the runtime: http://imgur.com/a/GNeJk

    Any suggestions what could be wrong?

    Best, Andrej Pangercic

    ReplyDelete
  2. UnknownDecember 10, 2017 at 1:07 AM

    Thanks for this manual.
    When I add the OpenCV by Nuget package, my Intellisense of visual studio will be deactivated. Have you experienced such this problem?

    ReplyDelete
    Replies
    1. UnknownDecember 10, 2017 at 1:17 AM

      This comment has been removed by the author.

      Delete
    2. UnknownDecember 10, 2017 at 1:18 AM

      Just opencv 2.4 by itseez.
      Opencv3 by itseez does not have this problem.

      Delete
  3. MobilunityMarch 6, 2018 at 7:08 AM

    This comment has been removed by the author.

    ReplyDelete
  4. MobilunityMarch 6, 2018 at 7:09 AM

    Thank you for this guide. Very comprehensive and informative. See also my blog

    ReplyDelete
  5. UnknownMarch 10, 2018 at 11:06 AM

    Hi,compiles fine but when executing my program this error comes:"The code execution cannot proceed because zlid1.dll was not found." please help

    ReplyDelete
  6. edgar ador elJune 21, 2018 at 8:45 PM

    zlibd1.dll issue too

    ReplyDelete
  7. RSeptember 10, 2018 at 11:49 PM

    fuck this

    ReplyDelete
  8. JarekParalFebruary 4, 2019 at 2:00 AM

    zlibd1.dll issue too

    ReplyDelete
  9. VlFebruary 7, 2019 at 10:58 AM

    Hi,
    This package have problem to run from debug. results to missing zlibd1.dll. Please use release. The release is used in last image.
    You can sometimes copy dll next to your exe file because of missing system path.
    Thanks

    ReplyDelete

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