I have a an image in processing that is being scanned to look for black pixels which, once a black pixel is found, prints the y axis coordinate.

I need a line to be scanning down the image as it reads it, can anyone help me with this? I have a line drawn on the image but I need it to move down as it scans. Here is the code so far.

/**

* oscP5sendreceive by andreas schlegel

* example shows how to send and receive osc messages.

* oscP5 website at http://www.sojamo.de/oscP5

*/

import oscP5.*;

import netP5.*;

 

OscP5 oscP5;

NetAddress myRemoteLocation;

PImage img; 

int myx = 1;

int pixelMessage;

void setup() {

 size(398, 5184);

 frameRate(25);

 /* start oscP5, listening for incoming messages at port 12000 */

 oscP5 = new OscP5(this,12000);

 

 /* myRemoteLocation is a NetAddress. a NetAddress takes 2 parameters,

  * an ip address and a port number. myRemoteLocation is used as parameter in

  * oscP5.send() when sending osc packets to another computer, device, 

  * application. usage see below. for testing purposes the listening port

  * and the port of the remote location address are the same, hence you will

  * send messages back to this sketch.

  */

 myRemoteLocation = new NetAddress("127.0.0.1",12001);

 img = loadImage("final.jpg");

}

void draw() {

 background(0);

 

  img.loadPixels();

  image(img,0,0);

  

  

  //creates a loop that will consider each pixel in turn

  for (int y = 0; y < height; y++) {

    for (int x = 0; x < width; x++) {

      int loc = x + y*width;

      

     {  line(0, 350, width, 350); 

 stroke(255, 0, 0); } 

      //test to see if the pixel being considered is black

      if(img.pixels[loc]==color(0,0,0)){ 

        //delay slows down the process so we can see it

        delay(100);

        //print the column (x)

      println (x);

       /* in the following different ways of creating osc messages are shown by example */

 OscMessage myMessage = new OscMessage("/test");

 myMessage.add(x); /* add an int to the osc message */

 /* send the message */

 oscP5.send(myMessage, myRemoteLocation); 

      }

  }

  }

}