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# Second Window to Display Coordinates

edited October 2013

Hi,

I'm not sure if I have posted to the wrong board so please move if incorrect.

So basically I am very new to Processing and have been doing a lot of searching to try and solve my problem but to no avail.

I have found an example piece of code to track a selected colour via a webcam, great it works.

``````// 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);
video.start();
// Start off tracking for red
trackColor = color(255,0,0);
smooth();
}

void draw() {
// Capture and display the video
if (video.available()) {
}
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];
}
``````

What I want to ultimately do is take the tacked pixel coordinates (closestX,closestY) and display them in a separate window.

Any tips would be greatly appreciated.

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