p5_SIFT.pde

import gab.opencv.*;

import java.awt.image.BufferedImage;
import java.awt.image.DataBufferInt;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Iterator;
import java.util.List;

import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfDMatch;
import org.opencv.core.MatOfInt;
import org.opencv.core.MatOfKeyPoint;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.features2d.DMatch;
import org.opencv.features2d.DescriptorExtractor;
import org.opencv.features2d.DescriptorMatcher;
import org.opencv.features2d.FeatureDetector;
import org.opencv.features2d.Features2d;
import org.opencv.features2d.GenericDescriptorMatcher;
import org.opencv.features2d.KeyPoint;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;
import org.opencv.objdetect.CascadeClassifier;

MatOfKeyPoint keyPoint01;
PImage pimg;


void settings() {
  size(1600, 1000);
}

void setup() 
{
  System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

  pimg = loadImage(sketchPath() + "/test_image.png");
  Mat image01 = Highgui.imread( sketchPath() + "/test_image.png");
  surface.setResizable(true);
  Mat grayImage01 = new Mat(image01.rows(), image01.cols(), image01.type());
  Imgproc.cvtColor(image01, grayImage01, Imgproc.COLOR_BGRA2GRAY);
  Core.normalize(grayImage01, grayImage01, 0, 255, Core.NORM_MINMAX);
  FeatureDetector siftDetector = FeatureDetector.create(FeatureDetector.SIFT);
  DescriptorExtractor siftExtractor = DescriptorExtractor.create(DescriptorExtractor.SIFT);

  keyPoint01 = new MatOfKeyPoint();
  siftDetector.detect(grayImage01, keyPoint01);

  Mat descripters01 = new Mat(image01.rows(), image01.cols(), image01.type());
  siftExtractor.compute(grayImage01, keyPoint01, descripters01);
}

void draw()
{
  image(pimg, 0, 0);
  noFill();
  stroke(0, 255, 0);
  for (int i = 0; i < keyPoint01.toArray().length; i++ )
  {
    ellipse( (float) keyPoint01.toArray()[i].pt.x, (float) keyPoint01.toArray()[i].pt.y, 10, 10);
  }
}