From:   dylan@thisisnotlondon.com
Subject: how to i set the video input to equal a variable in processing
Date: 27 May 2005 3:04:31 PM
To:   glen@glenmurphy.com

i need to declare the camera input as the video variable but not sure how

I have this which grabs my video

import processing.video.*;
Capture myCapture;

void setup()
{
 size(320, 240);
   String s = "QuickCam";
 myCapture = new Capture(this, s, width, height, 30);
}

void captureEvent(Capture myCapture) {
 myCapture.read();
}

void draw() {
 image(myCapture, 0, 0);
}



and this which analyses it

import processing.video.*;


int video_width  = 320;
int video_height = 240;
int num_pixels = (video_width * video_height);

//-------------------------------------------
void setup(){
 size(320, 240);
 beginVideo(video_width, video_height, 30);
}

//-------------------------------------------
void loop(){

 int black = color(0,0,0);                  // Declare some constants for colors.
 int white = color(255,255,255);
 int threshold = 127;
 
 int pix_val;                               // Declare variables to store a pixel's color.
 float pix_bri;
 
                                            // Split the image into dark and light areas:
 for (int i=0; i<num_pixels; i++){          // For each pixel in the video frame,
   pix_val = video.pixels[i];               // fetch the current color in that location,
   pix_bri = brightness (pix_val);          // and compute the brightness of that pixel.
                         
   if (pix_bri > threshold){                // Now "binarize" the video into black-and-white,
     pixels[i] = white;                     // depending on whether each pixel is brighter
   } else {                                 // or darker than a threshold value.
     pixels[i] = black;
   }
 }
                                            // Test a location to see where it is contained.
 int test_val = get (mouseX, mouseY);       // Fetch the pixel at the test location (the cursor),
 float test_bri = brightness (test_val);    // and compute its brightness.
 if (test_bri > threshold){                 // If the test location is brighter than threshold,
   fill (255,0,0);                          // draw a RED ellipse at the test location.
   ellipse (mouseX-10, mouseY-10, 20,20);
 } else {                                   // Otherwise,
   fill (0,255,0);                          // draw a GREEN ellipse at the test location.
   ellipse (mouseX-10, mouseY-10, 20,20);
 }

}

I just cant figure out how to get the two parts to talk to each other..all help appreciated

Dylan