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// Smoother color tracking // based on Dan Shiffman & Dan O'Sullivan's examples import processing.video.*; import processing.serial.*; Serial mySerial; // Variable for capture device Capture video; // A variable for the color we are searching for. color trackColor; float thresh = 19; int avgX, avgY; //this is what we are trying to find float xPos; float yPos; PImage bridge; void setup() { size(800, 600); video = new Capture(this, width, height); video.start(); // Start off tracking for red trackColor = color(255, 0, 0); bridge =loadImage("bridge.jpg"); String portName=Serial.list()[4]; //replace number with port STARTS WITH ZERO mySerial =new Serial(this,portName,9600); mySerial.readStringUntil('\n'); } void draw() { tint( 255, 255 ); // No tint // Capture and display the video if (video.available()) { video.read(); } video.loadPixels(); image(video, 0, 0); //we are going to find the average location of changed pixels so //we will need the sum of all the x find, the sum of all the y // find and the total finds int totalFoundPixels= 0; int sumX = 0; int sumY = 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); // colors we are looking for float r2 = red(trackColor); float g2 = green(trackColor); float b2 = blue(trackColor); // Using euclidean distance to compare colors float difference = 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 (difference < thresh) { sumX = sumX + x; sumY= sumY + y; totalFoundPixels++; } } } // average the locations of all the pixels that were close enough. if (totalFoundPixels > 0) { avgX = sumX/totalFoundPixels; avgY = sumY/totalFoundPixels; // Draw a circle at the tracked pixel fill(trackColor); strokeWeight(4.0); stroke(0, 127); ellipse(avgX-10, (avgY-10), 20, 20); println("L"); } image(bridge,500,400); if (totalFoundPixels <=0) { tint(255,0,0,500); image(bridge,500,400); println("H"); } } void serialEvent (Serial myPort){ if(mySerial ==null)return; //if nothing inside, but fires, sidestep String input = mySerial.readStringUntil('\n'); if(input != null) { //if input inside, get input, get rid of white space, casting println("H"); input =input.trim(); // // diam =float(input); //casting transmits into value // println(diam); //prints out value }} void mousePressed() { //Save color where the mouse is clicked in trackColor variable int loc = mouseX + mouseY*video.width; trackColor = video.pixels[loc]; } void keyPressed() { //for adjusting things on the fly if (key == '-') { thresh--; println("Threshold " + thresh); } else if (key == '=') { thresh++; println("Threshold " + thresh); } } |