Java-Image-Prozessor

Main.java

public final class Main extends javafx.application.Application
{
  @java.lang.Override
  public void start( final javafx.stage.Stage stage )
  {
    stage.setTitle( "Image Viewer" );
    stage.setWidth( 1 );
    stage.setHeight( 1 );
    final javafx.scene.layout.VBox box = new javafx.scene.layout.VBox();
    { final javafx.scene.image.ImageView view = new javafx.scene.image.ImageView();
      { final java.io.InputStream stream = Main.class.getResourceAsStream
        ( /* must be in the SAME DIRECTORY as the class file! */ "example.jpg" );
        final javafx.scene.image.Image image = new javafx.scene.image.Image( stream );
        /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */
        final javafx.scene.image.WritableImage writable
        = new javafx.scene.image.WritableImage( ( int )image.getWidth(),  ( int )image.getHeight() );
        final javafx.scene.image.PixelWriter writer = writable.getPixelWriter();
        /* Obtain PixelReader */
        final javafx.scene.image.PixelReader reader = image.getPixelReader();
        System.out.println("Image Width: "+image.getWidth());
        System.out.println("Image Height: "+image.getHeight());
        System.out.println("Pixel Format: "+reader.getPixelFormat());
        for ( int y = 0; y < image.getHeight(); ++y ) 
        {
          for (int x = 0; x < image.getWidth(); ++x) 
          {
            final javafx.scene.paint.Color color = reader.getColor( x, y );
            /* color.toString()
               getRed()getGreen()getBlue()
               getOpacity()getSaturation()getHue()getBrightness(); */
            /* if( color.getSaturation() > 0.2 && color.getHue() > 180  && color.getHue() < 300 ) */
            /* if
               ( color.getSaturation() > 0.2 && 
                 color.getHue() > 50  && 
                 color.getHue() < 310 )
               writer.setColor
               ( x, y, 
                 javafx.scene.paint.Color.hsb
                 ( color.getHue() + 190, 
                   color.getSaturation() * color.getSaturation(), 
                   color.getBrightness(), color.getOpacity() )); */
            /* if
               ( color.getBrightness() > 0.2 && 
                 color.getSaturation() > 0.4 && 
                 color.getHue() > 50  && 
                 color.getHue() < 310 )
               writer.setColor
               ( x, y, 
                javafx.scene.paint.Color.hsb
                ( color.getHue() + 190, 
                  java.lang.Math.sqrt( color.getSaturation() ), 
                  java.lang.Math.pow( color.getBrightness(), 1.5 ), color.getOpacity() )); */
                if
                ( color.getBrightness() < 0.5 &&
                  ( color.getRed() * 2 < color.getBlue() &&
                    color.getRed() * 2 < color.getGreen() ))
                writer.setColor
                ( x, y, 
                 javafx.scene.paint.Color.color
                 ( color.getRed(), ( color.getGreen() / 2 ), ( color.getBlue() / 2 ), color.getOpacity() ));
                else writer.setColor( x, y, color );
            }
        }
/* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */
        view.setImage( writable );
        view.setPreserveRatio( true );
        view.fitWidthProperty().bind( stage.widthProperty() );
        view.fitHeightProperty().bind( stage.heightProperty() ); }
      box.getChildren().addAll( view ); }
    stage.setScene( new javafx.scene.Scene( box ) );
    { /* set stage size to screen size */
      final javafx.geometry.Rectangle2D bounds = javafx.stage.Screen.getPrimary().getVisualBounds();
      stage.setX(      bounds.getMinX()   );
      stage.setY(      bounds.getMinY()   );
      stage.setWidth(  bounds.getWidth()  );
      stage.setHeight( bounds.getHeight() ); }
    stage.show(); }
  public static void main( final java.lang.String[] args )
  { Main.launch( args ); }}