Marker not getting detected to display my digital box

Answers

• rojele

  October 2016

  Hi, as far as I know, that's a problem with GSLibrary. NYar2 lib needs to work with GSVideo, but GSvideo is not update for processing 3. Try with processing 1.5 and GSvideo. Here you have an example:

  cheers.

  By the way, I'm trying to find a solution for GSvideo to work in processing 3. Anyone knows?

    /**   
      example from nyar4psg modified to demonstrate NyARMultiBoard + NyARMultiBoardMarker by
      Charl P. Botha <http://cpbotha.net/>;
  
      updated on 20110305 to use the new P3D / OPENGL adaptation I hacked into NyARMultiBoard,
      and to show framerate in top-left corner. On this machine, P3D is faster.
  
    */
  
    // we want to use the gsvideo camera support stack
    import codeanticode.gsvideo.*;
    // multiple marker tracking
    import jp.nyatla.nyar4psg.*;
    // only necessary if you're using the OPENGL renderer (see the size() call in setup())
    import processing.opengl.*;
  
    GSCapture cam;
    NyARMultiBoard nya;
    PFont font, font2d;
  
    void setup() {
      // our display is 640x480
      size(640,480,P3D);
      colorMode(RGB, 100);
      font=createFont("FFScala", 32);
      font2d = createFont("FFScala", 10);
      // I'm using the GSVideo capture stack, we're capturing at
      // the same size as the display, which should be 640x480
      // on Linux with the Sony PS3 Eye
      cam=new GSCapture(this,width,height);
      cam.start();
      // array of pattern file names, these have to be in the data subdir of this sketch
      String[] patts = {"patt.hiro", "patt.kanji"};
      // array of corresponding widths in mm
      double[] widths = {80,80};
      // initialise the NyARMultiBoard
      // the camera parameter file is also in the data subdir
      nya=new NyARMultiBoard(this,width,height,"camera_para.dat",patts,widths);
      //print(nya.VERSION);
  
      // marker detection algorithm parameter
      nya.gsThreshold=120;//(0<n<255) default=110
  
      // a marker has to be detected with a confidence greater than
      // this threshold for it to be considered a true detection
      nya.cfThreshold=0.4;//(0.0<n<1.0) default=0.4
  
    }
  
    // draw marker corners and also position in text
    void drawMarkerPos(int[][] pos2d)
    {
      textFont(font,10.0);
      stroke(100,0,0);
      fill(100,0,0);
  
      // draw ellipses at outside corners of marker
      for(int i=0;i<4;i++){
        ellipse(pos2d[i][0], pos2d[i][1],5,5);
      }
  
      fill(0,0,0);
      for(int i=0;i<4;i++){
        text("("+pos2d[i][0]+","+pos2d[i][1]+")",pos2d[i][0],pos2d[i][1]);
      }
    }
  
    // standard processing event handler that's called for display updates
    void draw() {
      // we only do something when the camera input is available
      if (cam.available() !=true) {
        return;
      }
  
      // get an image from the camera
      cam.read();
  
      // need to put camera image on screen, so temporarily disable depth testing
      hint(DISABLE_DEPTH_TEST);
      // put webcam image on screen
      image(cam,0,0);
      hint(ENABLE_DEPTH_TEST);
  
      // if *any* markers have been detected this will be true
      if (nya.detect(cam)) {
        // going to be doing 2D drawing (drawMarkerPos) so temporarily disable depth testing
        hint(DISABLE_DEPTH_TEST);
  
        // for all detected markers, draw corner points
        for (int i=0; i < nya.markers.length; i++)
        {
          if (nya.markers[i].detected)
          {
            drawMarkerPos(nya.markers[i].pos2d);
          }
        }
  
        // depth test back on, we're going to draw 3D YEAH!!
        hint(ENABLE_DEPTH_TEST);
  
        // for all detected markers:
        for (int i=0; i < nya.markers.length; i++){
          if (nya.markers[i].detected){
           // set the model-view transform to that of the marker
           // this will adapt automatically to P3D or OPENGL renderers
           nya.markers[i].beginTransform();
  
           translate(0,0,20);
  
           // if it's the hiro marker, draw a 3D cube
           if (i == 0) {
             stroke(255,200,0);
             box(40);
           }
           // else draw a sphere
           else {
             stroke(0,200,255);
             sphere(25);
           }
  
           // after drawing marker-relative 3D geometry, we
           // HAVE to end the transform (so now we're back in
           // world space)
           nya.markers[i].endTransform();
  
          }
        }
  
  
      }
  
      // display frame rate in the top left of the screen
      // on this Dell E6410 Core i5 laptop:
      // OPENGL: 45 fps
      // P3D: 57 fps
      hint(DISABLE_DEPTH_TEST);
      textFont(font2d,10.0);
      textMode(SCREEN);
      fill(100,100,0);
      text("frame rate = " + frameRate, 10, 10);
      textMode(MODEL);
      hint(ENABLE_DEPTH_TEST);  
    }