// Learning Processing // Daniel Shiffman // http://www.learningprocessing.com // Example 16-11: Simple color tracking import processing.video.*; // Variable for capture device Capture video; // A variable for the color we are searching for. color trackColor; void setup() { size(320,240); video = new Capture(this,width,height,15); // Start off tracking for red trackColor = color(255,0,0); smooth(); } void draw() { // Capture and display the video if (video.available()) { video.read(); } video.loadPixels(); image(video,0,0); // Before we begin searching, the "world record" for closest color is set to a high number that is easy for the first pixel to beat. float worldRecord = 500; // XY coordinate of closest color int closestX = 0; int closestY = 0; // Begin loop to walk through every pixel for (int x = 0; x < video.width; x ++ ) { for (int y = 0; y < video.height; y ++ ) { int loc = x + y*video.width; // What is current color color currentColor = video.pixels[loc]; float r1 = red(currentColor); float g1 = green(currentColor); float b1 = blue(currentColor); float r2 = red(trackColor); float g2 = green(trackColor); float b2 = blue(trackColor); // Using euclidean distance to compare colors float d = dist(r1,g1,b1,r2,g2,b2); // We are using the dist( ) function to compare the current color with the color we are tracking. // If current color is more similar to tracked color than // closest color, save current location and current difference if (d < worldRecord) { worldRecord = d; closestX = x; closestY = y; } } } // We only consider the color found if its color distance is less than 10. // This threshold of 10 is arbitrary and you can adjust this number depending on how accurate you require the tracking to be. if (worldRecord < 10) { // Draw a circle at the tracked pixel fill(trackColor); strokeWeight(4.0); stroke(0); ellipse(closestX,closestY,16,16); } } void mousePressed() { // Save color where the mouse is clicked in trackColor variable int loc = mouseX + mouseY*video.width; trackColor = video.pixels[loc]; }
Tuesday
Colour tracking Code!!!
Here is the code I sourced from Learning Processing website for colour tracking:
Subscribe to:
Post Comments (Atom)
0 comments:
Post a Comment