//---------------------------------------------------------//// author: thomas diewald// date: 06.09.2011//// example how to use diewald_CV_kit.blobdetection.//// -------------------------------------------------------// interaction://// mouseX - defines the brightness treshhold// dragged mouse - drag a rectangle to define the detection area//// key 'UP' - lower resolution// key 'DOWN' - higher resolution// key 'b' - draw boundingsboxes of blobs// key 'f' - fill blobs//---------------------------------------------------------

import diewald_CV_kit.libraryinfo.*;import diewald_CV_kit.utility.*;import diewald_CV_kit.blobdetection.*;import java.util.ArrayList;

PFont font;PImage sample_img;

int size_x, size_y;BlobDetector blob_detector;BoundingBox detection_area;int detection_resolution = 1;boolean draw_blobs_boundingsbox = true;boolean draw_filled_blobs = true;

public void setup() { size(640, 480); // sample_img = loadImage(image_path + "imageprocessing_gradient_v7_600x600.jpg"); sample_img = loadImage("imageprocessing_gradient_v9_640x480.jpg"); size_x = sample_img.width; size_y = sample_img.height; //size(size_x, size_y); size(640, 480);

sample_img.loadPixels();

blob_detector = new BlobDetector(size_x, size_y); blob_detector.setResolution(detection_resolution); blob_detector.computeContours(true); blob_detector.computeBlobPixels(!true); blob_detector.setMinMaxPixels(10*10, size_x*size_y);

blob_detector.setBLOBable(new BLOBable_GRADIENT(this, sample_img));

detection_area = new BoundingBox(0, 0, size_x, size_y);

blob_detector.setDetectingArea(detection_area);

font = createFont("Calibri", 14); textFont(font); frameRate(200);}

public void draw() { background(255);

image(sample_img, 0, 0);

// draw the detection-area stroke(0, 0, 0); strokeWeight(1); noFill(); rect(detection_area.xMin(), detection_area.yMin(), detection_area.xSize()-1, detection_area.y-Size()-1);

// set resolution - improves speed a lot blob_detector.setResolution(detection_resolution);

//update the blob-detector with the new pixelvalues blob_detector.update();

// get a list of all the blobs ArrayList<Blob> blob_list = blob_detector.getBlobs();

// iterate through the blob_list for (int blob_idx = 0; blob_idx < blob_list.size(); blob_idx++ ) {

// get the current blob from the blob-list Blob blob = blob_list.get(blob_idx);

// get the list of all the contours from the current blob ArrayList<Contour> contour_list = blob.getContours();

// iterate through the contour_list for (int contour_idx = 0; contour_idx < contour_list.size(); contour_idx++ ) {

// get the current contour from the contour-list Contour contour = contour_list.get(contour_idx);

// get the current boundingbox from the current contour BoundingBox bb = contour.getBoundingBox();

// handle the first contour (outer contour = contour_idx == 0) different to the inner contours if ( contour_idx == 0) {

// draw the boundingbox and blob-id as text if ( draw_blobs_boundingsbox ) { drawBoundingBox(bb, color(0, 200, 200), 1);

fill(0, 200, 200); text("blob["+blob_idx+"]", bb.xMin(), bb.yMin()- textDescent()*2); }

// draw the contour drawContour(contour.getPixels(), color(255, 0, 0), color(255, 0, 255, 100), draw_filled_blobs, 1); } else { // draw the inner contours, if they have more than 20 vertices if ( contour.getPixels().size() > 20) { drawContour(contour.getPixels(), color(255, 150, 0), color(0, 100), false, 1); } } } }

// simple information about framerate, and number of detected blobs fill(0, 200); noStroke(); rect(0, 0, 150, 50); printlnNumberOfBlobs(blob_detector); printlnFPS();}