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@hrshovon
hrshovon / build_opencv_ARM_cross
Last active May 21, 2022 17:10
Cross compile opencv3.3.0 for your raspberry pi and similar ARM devices with python support
This is a note on how to cross compile opencv for pretty much any ARM device(HardFP supported in this case) and deploy. Native
compiling in ARM devices can be painfully slow and they seem to hang often during build(mine got stuck at 43%). So if you happen
to have a desktop/laptop/server running ubuntu or similar linux distro, u can build opencv in fractionth of the time taken for
native compiling without any issues.
Building opencv3 with TBB and NEON and VFP support can boost opencv performance. Thanks to Adrian at pyimagesearch for pointing
that out.
Both my PC and target machine aka orange pi zero are running ubuntu 16.04 with python2.7 and python 3.5.
Let us use the term "build machine" for your PC where you are building opencv and "target machine" for the ARM single board computer.
1.Run the following commands in both machines(I think installing these in target machine only would do) to install the necessary libraries etc.(mine worked with them,so they should be enough
@santisbon
santisbon / Update-branch.md
Last active June 4, 2025 20:58
Deploying from #Git branches adds flexibility. Bring your feature branch up to date with master and deploy it to make sure everything works. If everything looks good the branch can be merged. Otherwise, you can deploy your master branch to return production to its stable state.

Updating a feature branch

First we'll update your local master branch. Go to your local project and check out the branch you want to merge into (your local master branch)

$ git checkout master

Fetch the remote, bringing the branches and their commits from the remote repository. You can use the -p, --prune option to delete any remote-tracking references that no longer exist in the remote. Commits to master will be stored in a local branch, remotes/origin/master.




  


  




    


          
    

      

        
        

          

              @oleq
          

          

            
                oleq
                / _README.md
            
            

              Last active
              September 7, 2024 13:11
            

              
                A2DP audio streaming using Raspberry PI (Raspbian Jessie)
              
          

        

      

        

  

      

    
What is this all about?


This tutorial will turn your Raspberry PI into a simple Bluetooth audio receiver, which plays music through connected speakers. It's like a regular car audio system, but it can be used anywhere and it's a good value.


   Audio source (i.e. smartphone) 
                |
                v
 (((  Wireless Bluetooth Channel  )))
 |




  


  




    


          
    

      

        
        

          

              @itsrifat
          

          

            
                itsrifat
                / extract_frames.cpp
            
            

              Last active
              July 13, 2023 18:48
            

              
                simple c++ functions to extract frames of a video file into a vector of Mat and saving the vector as jpg images using OpenCV 2.4.9
              
          

        

      

        

  

    
    


        



  


  

        

          
          /*
        

        

          
          This functions opens a video file and extracts the frames and put them into a vector of Mat(its the class for representing an img)
        

        

          
          */
        

        

          
          void extract_frames(const string &videoFilePath,vector<Mat>& frames){
        

        

          
          	
        

        

          
          	try{
        

        

          
          		//open the video file
        

        

          
            	VideoCapture cap(videoFilePath); // open the video file
        

        

          
            	if(!cap.isOpened())  // check if we succeeded
        

        

          
            		CV_Error(CV_StsError, "Can not open Video file");
        

  





    


  




    


          
    

      

        
        

          

              @ybakos
          

          

            
                ybakos
                / GraphicGlDemoActivity.java
            
            

              Created
              November 27, 2012 00:52
            

              
                A simple example of using an Android Renderer to illustrate OpenGL ES boilerplate.
              
          

        

      

        

  

    
    


        



  


  

        

          
          /* GraphicGlDemoActivity.java
        

        

          
           * Author: Yong Bakos
        

        

          
           * Since: 11/26/2012
        

        

          
           * Thanks to:
        

        

          
           * Cube: http://intransitione.com/blog/create-a-spinning-cube-with-opengl-es-and-android/
        

        

          
           * OpenGL Boilerplate: http://www.jayway.com/2009/12/03/opengl-es-tutorial-for-android-part-i/
        

        

          
           */
        

        

          
          package com.humanoriented.sudoku;
        

        

          
          

        

        

          
          import java.nio.ByteBuffer;