This code enhances the shadows and saturation.

Example result with the image with
Tabby Cat With Long Fur

http://www.photos-public-domain.com/2012/04/06/tabby-cat-with-long-fur/

 

Example result with the image with
Gray Tabby Cat On Kitchen Counter

http://www.photos-public-domain.com/2010/12/03/gray-tabby-cat-on-kitchen-counter/

 

Description of this image manipulation code.

It's an image manipulation type creative coding made with the 'Processing'. It enhances the shadows and saturation of the original image.

This is a revised version of PsychedeliCat.

 

You can try with your own photo.

You can hard coding the path of your photo image file or you can give command line parameter like this.

/your_processing_installed_path/processing-java --force --sketch=/your_sketch_path/ --run /your_photo_file_path

 

The 'Processing' example code.

Please feel free to use this example code under the terms of the GPL.
To see other works based on my code is my pleasure. And my honor.

// AmplifiCat.
// @author @deconbatch
// @version 0.2
// Processing 3.2.1
// 0.1 2017.06.05
// 0.2 2018.12.23

/* ---------------------------------------------------------------------- */
abstract class PshapeElement {

  PShape anElement;
  float elementColor, elementSaturation, elementBright, elementAlpha;
  
  PshapeElement() {
    anElement = pscreateElement();
    elementColor = 0;
    elementSaturation = 0;
    elementBright = 0;
    elementAlpha = 0;
  }

  abstract PShape pscreateElement();

  void setElementFill(float pcolor, float psaturation, float pbright, float palpha) {
    elementColor = pcolor;
    elementSaturation = psaturation;
    elementBright = pbright;
    elementAlpha = palpha;
    resetColor();
  }

  void resetColor() {
    anElement.setStroke(color(elementColor, elementSaturation, elementBright, elementAlpha));
  }

  void changeColor(float scolor) {
    elementColor = scolor;
    resetColor();
  }

  void changeBright(float sbright) {
    elementBright = sbright;
    resetColor();
  }

  void resetSize() {
    anElement.resetMatrix();
  }

  void changeSize(float scaleX, float scaleY) {
    anElement.scale(scaleX, scaleY);
  }

  void rotate(float radX) {
    anElement.rotate(radX);
  }

  void show() {
    shape(anElement);
  }

}

/* ---------------------------------------------------------------------- */
class BoxBrush extends PshapeElement {

  
  BoxBrush() {
    super();
  }

  PShape pscreateElement() {

    noFill();
    PShape psDp = createShape(RECT, -0.5, -0.5, 1, 1);
    return psDp;

  }

}

/* ---------------------------------------------------------------------- */

PImage img;
PshapeElement brush;

float canvasW, canvasH;
float rateSize;

void setup() {
  size(1080, 1080);
  float baseWH = 980;
  
  colorMode(HSB, 360, 100, 100, 100);
  smooth(8);
  noLoop();

  brush = new BoxBrush();

  if (args == null) {
    // you can use your photo in ./data/your_image.jpg
    img = loadImage("your_image.jpg");
  } else {
    // args[0] must be image path
    img = loadImage(args[0]);
  }

  // fit to canvas size
  rateSize = baseWH / max(img.width, img.height);
  canvasW = img.width * rateSize;
  canvasH = img.height * rateSize;
  img.resize(int(canvasW), int(canvasH));
  img.loadPixels();

}

void draw() {

  background(0, 0, 0);
  translate((width - canvasW) / 2, (height - canvasH) / 2);

  for (int cntEffect = 0; cntEffect < 36 * rateSize; ++cntEffect) {
    slideAndDraw();
    slideBack();
  }

  drawPixels();

  saveFrame("frames/####.png");
  exit();

}

void slideAndDraw() {

  // ommit zero row and column
  for (int idxW = 2; idxW < img.width; ++idxW) {  
    for (int idxH = 2; idxH < img.height; ++idxH) {

      int idxFlatmate = idxH * img.width + idxW;
      int idxNeighbor = (idxH - 2) * img.width + (idxW - 2);
          
      color flatmate = img.pixels[idxFlatmate];
      color neighbor = img.pixels[idxNeighbor];

      if (abs(saturation(flatmate) - saturation(neighbor)) > 10  ||
          abs(brightness(flatmate) - brightness(neighbor)) > 14) {
        img.pixels[idxNeighbor] = color(
                                        hue(flatmate),
                                        saturation(flatmate) * 1.20,
                                        brightness(flatmate) * 0.99
                                        );
      } else {
        img.pixels[idxNeighbor] = color(
                                        hue(flatmate),
                                        saturation(flatmate) * 0.99,
                                        brightness(flatmate) * 1.05
                                        );
      }

    }
  }

}

void slideBack() {

  for (int idxW = img.width - 1; idxW >= 2; --idxW) {  
    for (int idxH = img.height - 1; idxH >= 2; --idxH) {

      int idxFlatmate = idxH * img.width + idxW;
      int idxNeighbor = (idxH - 2) * img.width + (idxW - 2);

      img.pixels[idxFlatmate] = img.pixels[idxNeighbor];

    }
  }

}

void drawPixels() {
  
  for (int idxW = 0; idxW < img.width; ++idxW) {  
    for (int idxH = 0; idxH < img.height; ++idxH) {
      color c = img.pixels[idxH * img.width + idxW];
      pushMatrix();
      translate(idxW, idxH);
      brush.setElementFill(hue(c), saturation(c), brightness(c), 100);
      brush.show();
      popMatrix();
    }
  }

}


/*
Copyright (C) 2017- deconbatch

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*/

Yes, I know. I don't have to use 'abstract class PshapeElement ' at all...