Ascii Art

PImage img;

PImage newimg;

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final string fileName = "Vsauce.png"; //select file here

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final string chars = {"#", "%", "@", "$", "0", "=", "=", "."};

//origional: {"#", "%", "@", "$", "0", "=", "-", ":", "."};

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final int blur = -1; //-1 to stay as default, 0 for none, 1 for one pixel, 2 for 2 pixels, etc

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final float shrinkFactor = 8; //default : 2 [higher value = lower resolution image, 0.5 = twice the resolution]

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final int shrinkSize;

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string[] ascii;

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int stage;

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int i = 0;

int j = 0;

​

int ni = 0;

int nj = 0;

​

int ai = 0;

int aj = 0;

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stringAscii = "";

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void setup() {

  size(700, 700);

  frameRate(60);

  stage = 2;

  fill(255);

  img = requestImage(fileName); //upload any image

  //Make sure the string here ^^ matches the name of your file

}

​

​

​

void initVar() {

  shrinkSize = int(img.width / shrinkFactor);

  newimg = createImage(shrinkSize, shrinkSize);

  if (blur == -1) {

    blur = ceil(img.width / shrinkSize);

  }

}

​

​

​

void draw() {

  background(0);

  if (img.width == 0) {                                     //STEP 1: wait until image finishes loading

    textSize(25);

    textAlign(CENTER, CENTER);

    text("Loading...", width / 2, 3 * height / 4);

    textSize(12);

    textAlign(LEFT);

    return;

  }

  if (stage == 2) {

    initVar();                                              //STEP 2: initiate variables

    stage++;

  }

  if (stage == 3) {

    render(newimg.width * newimg.height / 120);             //STEP 3: 'render' the image used for converting to ascii

  }

  image(newimg, 0, 0, width, height);

  // show the PImage on screen

  if (stage == 4) {                                         //STEP 4: print ascii art into console

    renderAscii(newimg.width * newimg.height / 120);

  }

  textSize(11);

  fill(255);

  text("fps: " + int(frameRate), 5, 15);

}

​

​

​

void render(int iters) {

  newimg.loadPixels();

  img.loadPixels();

  for (int iter = 0; iter < iters; iter++) {

    ni = int(i * img.width / newimg.width);

    nj = int(j * img.height / newimg.height);

​

    int a = 0; //sum

    int l = 0; //length

​

    for (int n = -blur; n <= blur; n++) {

      for (int m = -blur; m <= blur; m++) {

        if (ni + n < 0 || ni + n >= img.width || nj + m < 0 || nj + m >= img.height) {

          continue;

        }

        a += int(brightness(img.pixels[ni + n + (nj + m) * img.width]));

        l++;

      }

    }

​

    a = a / l;

​

    newimg.pixels[i + j * newimg.width] = color(a);

    if (i < newimg.width) {

      i++;

    } else {

      i = 0;

      j++;

    }

​

    if (j >= newimg.height) {

      stage++;

      newimg.updatePixels();

      return;

    }

  }

  newimg.updatePixels();

}

​

void renderAscii(int nnn) {

  newimg.loadPixels();

  for (int iterate = 0; iterate < nnn; iterate++) {

    if (aj >= newimg.height) {

      fill(255);

      textSize(12);

      text("Done! Check console for output.", 5, 30);

      return;

    }

    stringAscii = stringAscii + " " + chars[int(chars.length * brightness(newimg.pixels[ai + aj * newimg.width]) / 256)];

    ai++;

    if (ai >= newimg.width) {

      ai = 0;

      aj++;

      println(stringAscii);

      stringAscii = "";

      if (aj >= newimg.height) {

        return;

      }

    }

  }

  fill(255);

  textSize(12);

  text("Printing ASCII to console: " + stringAscii, 5, 30);

}