How I can only move colored objects that I clicked on.

Loveiu

i used import video. How I can only move colored objects that I clicked on. Not moving in a similar color. When I click on an object with a specific color, I want to make a circle on the object and move the object so that the circle moves. http://learningprocessing.com/examples/chp16/example-16-11-ColorTrack // 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);
}

void captureEvent(Capture video) {
  // Read image from the camera
  video.read();
}

void draw() {
  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];
}

In the example above, clicking on a specific color will continue to move to a color similar to that color. But I want to move only objects that have exactly the color I clicked, not similar colors.

I finished 'learning processing' example10 only. So I do not know those video related codes... i'm korean but all lecture videos are in English....so i can't understand... therefore i question here....

Janglee123

// 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;
      }

change this part(upper) to this(lower) i think it will work

if(r1==r2&&g1==g2&&b1==b2)
{
     closestX = x;
     closestY = y;
}

jeremydouglass

I want to move only objects that have exactly the color I clicked, not similar colors

Another approach is to just use the code as-is. There is literally a note in the source code explaining what to change and how.

 // 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) {

So, according to the note in the source code explaining how to do this, change the "<10" to a "<1" or "<1" or "==0".

koogs

I'd move lines 42-44 before line 33 - you don't need to recalculate them for every pixel.

(In fact you don't even have to recalculate them every frame, only when the tracking colour changes)