Revision as of 12:39, 21 January 2016

Sound and Video Processing

Video Delay

import processing.video.*;

Capture camera;
int maxFrames;
int d = 4;
boolean recording = false;

ArrayList frames = new ArrayList();


void setup() {
  
  size(640, 480);
  
  maxFrames = width / d;
  
  // init camera
  camera = new Capture(this, width, height);
  
  camera.start(); // wichtig!
  
  // add first image
  PImage img = createImage(width, height, RGB);
  frames.add(img);

}


void draw() {
  
  int n = frames.size();
  
  // iterate over vertical strips
  for(int i = 0; i < n; i++) {
    
    // get snip from the frame
    PImage img = (PImage) frames.get(i);
    
    // x coordinate for the left side of the current strip
    int x1 = int(map(i, 0, n-1, 0, width/2 - 100));
    int y1 = int(map(i, 0, n-1, 0, height/2 - 100));
    
    int x2 = width - x1;
    int y2 = height - y1;
    
    int w = x2 - y1;
    int h = y2 - y1;
    
    PImage snip = img.get(x1, y1, w, h);
    
    // show strip on screen
    //tint(255, 50);
    image(snip, x1, y1);
    
  }
  
  if(recording) {
    
    saveFrame("frame-####.png");
    
    // recording feedback
    stroke(255, 0, 0);
    noFill();
    strokeWeight(5);
    rect(0, 0, width, height);

  }

}

void keyPressed() {
  recording = !recording;
}

void captureEvent(Capture camera) {
  
  camera.read(); // wichtig!
  PImage img = camera.get();
  
  frames.add(img);
  
  if( frames.size() > maxFrames) {
    frames.remove(0);
  } 
  
}

@@ Line 1: / Line 1: @@
-== Image Sorting ==
+=Sound and Video Processing =
-=== Pixel Sorting ===
-<source lang="java">
-PImage img;
-int id = 1;
-int sortMode = 1;
-void setup() {
-  size(600, 400);
-  reset();
-}
-void reset() {
-    img = loadImage("winterpark.jpg");
-}
-void draw() {
-  // load em
-  img.loadPixels();
-  color[] pxls = img.pixels;
-  switch(sortMode) {
-    case 1:
-      sortLeft(pxls);
-      break;
-    case 2:
-      sortDown(pxls);
-      break;
-    case 3:
-      sortUp(pxls);
-      break;
-  }
-  // update em
-  img.updatePixels();
-  // show em
-  image(img, 0, 0);
-}
-void sortLeft(color[] pxls) {
-  // do something with the pixels (remix them)
-  for(int y = 0; y < height; y++) {
-    for(int x = 0; x < width-1 ; x++) {
-      // get indices for left and right pixel
-      int left = y * img.width + x;
-      int right = y * img.width + (x+1);
-       // bubble sort step ( exchange pixels according to saturation ... )
-       int posx = mouseX - width / 2;
-       if(green(pxls[right]) - green(pxls[left]) < posx) {
-          // exchange color values of those pixels
-          color tmp= pxls[right];
-          pxls[right] = pxls[left];
-          pxls[left] = tmp;
-       }
-    }
-  }
-}
-void sortDown(color[] pxls) {
-  // do something with the pixels (remix them)
-  for(int x = 0; x < width; x++) {
-    for(int y = height - 2; y > 0 ; y--) {
-      // get indices for left and right pixel
-      int top = y * img.width + x;
-      int bottom = (y+1) * img.width + x;
-       // bubble sort step ( exchange pixels according to saturation ... )
-       int posx = mouseX - width / 2;
-       if(green(pxls[top]) - green(pxls[bottom]) < posx) {
-          // exchange color values of those pixels
-          color tmp= pxls[top];
-          pxls[top] = pxls[bottom];
-          pxls[bottom] = tmp;
-       }
-    }
-  }
-}
-void sortUp(color[] pxls) {
-  // do something with the pixels (remix them)
-  for(int x = 0; x < width; x++) {
-    for(int y = 0; y < height -1 ; y++) {
-      // get indices for left and right pixel
-      int top = y * img.width + x;
-      int bottom = (y+1) * img.width + x;
-       // bubble sort step ( exchange pixels according to saturation ... )
-       int posx = mouseX - width / 2;
-       if(green(pxls[top]) - green(pxls[bottom]) < posx) {
-          // exchange color values of those pixels
-          color tmp= pxls[top];
-          pxls[top] = pxls[bottom];
-          pxls[bottom] = tmp;
-       }
-    }
-  }
-}
-void keyPressed() {
-  switch(key) {
-    case ' ':
-      reset();
-      break;
-    case 's':
-      save("sorted-" + id +".jpg");
-      id++;
-      break;
-    case '1':
-      sortMode = 1;
-      break;
-    case '2':
-     sortMode = 2;
-     break;
-    case '3':
-     sortMode = 3;
-     break;
-  }
-}
-</source>
-----
-=== Tile Sorting ===
-<source lang="java">
-PImage img;
-int d = 10;
-PImage[] tiles;
-int rows, cols, n;
-void setup() {
-  size(600, 400);
-  img = loadImage("fall.jpg");
-  cols = (img.width/d);
-  rows = (img.height/d);
-  n = cols * rows;
-  tiles = new PImage[n];
-  for (int i = 0; i < n; i++) {
-    int x = d * (i % cols);
-    int y = d * (i / cols);
-    tiles[i] = img.get(x, y, d, d);
-  }
-}
-void draw() {
-   sort(tiles);
-   // show tiles
-   for(int i = 0; i < n; i++) {
-     PImage tile = tiles[i];
-     int y = d * (i / cols);
-     int x = d * (i % cols);
-     image(tile, x, y, d, d);
-   }
-}
-void sort(PImage[] tiles) {
-  for(int y = 0; y < rows; y++) {
-    for(int x = 0; x < cols-1; x++) {
-      int pos1 = y * cols + x;
-      int pos2 = y * cols + (x+1);
-      PImage tile1 = tiles[pos1];
-      PImage tile2 = tiles[pos2];
-      if( saturation(average(tile1)) - saturation(average(tile2)) > mouseX ) {
-        PImage tmptile = tiles[pos1];
-        tiles[pos1] = tiles[pos2];
-        tiles[pos2] = tmptile;
-      }
-    }
-  }
-}
-color average(PImage img) {
-  img.loadPixels();
-  color[] pxls = img.pixels;
-  float r = 0, g = 0, b = 0;
-  int n = pxls.length;
-  for(int i = 0; i < n; i++) {
-    color c = pxls[i];
-    r += red(c);
-    g += green(c);
-    b += blue(c);
-  }
-  color average = color(r/n, g/n, b/n);
-  return average;
-}
-</source>
-----
 == Video Delay ==