DZone Snippets: RGB code

Java - Erode

whitetiger () — Sun, 05 Nov 2006 19:27:14 GMT

// JAI Filter erode



public RenderedImage erode(BufferedImage img)

	{

		KernelJAI kernel = new KernelJAI(7, 7, new float[]{

															0, 0, 0, 0, 0, 0, 0,

															0, 1, 1, 1, 1, 1, 0,

															0, 1, 1, 1, 1, 1, 0,

															0, 1, 1, 1, 1, 1, 0,

															0, 1, 1, 1, 1, 1, 0,

															0, 1, 1, 1, 1, 1, 0,

															0, 0, 0, 0, 0, 0, 0

															});

		ParameterBlock pb = new ParameterBlock();

		pb.addSource(img);

		pb.add(kernel);

		

		return JAI.create("erode", pb);

	}

Java - subTraction

whitetiger () — Sun, 05 Nov 2006 16:23:01 GMT

// Use JAI filter



public RenderedImage subTraction(BufferedImage img1, BufferedImage img2)

	{

		ParameterBlock pb = new ParameterBlock();

		pb.addSource(img1);

		pb.addSource(img2);

		

		return JAI.create("subtract", pb);

	}

Java - showBitPlanes

whitetiger () — Sun, 05 Nov 2006 00:41:29 GMT

// the input it must be a b/w image



public BufferedImage showBitPlanes(BufferedImage bi, int lv)

	{

		int level = 0;

		

		switch(level)

		{

			case 0:

				level = 128;

				break;

			case 1:

				level = 64;

				break;

			case 2:

				level = 32;

				break;

			case 3:

				level = 16;

				break;

			case 4:

				level = 8;

				break;

			case 5:

				level = 4;

				break;

			case 6:

				level = 2;

				break;

			case 7:

				level = 1;

				break;

			default:

					return null;

		}

		

		int width = bi.getWidth();

		int height = bi.getHeight();

		

		BufferedImage img = new BufferedImage(width, height, bi.getType());

		

		for(int x=0; x			for(int y=0; y				img.setRGB(x, y, ((bi.getRGB(x, y) & level)/level)*255);

		

		return img;

	}

Java - Dilate3

whitetiger () — Sat, 04 Nov 2006 23:19:27 GMT

// pixel before the filter
// |--|--|--|
// | | | |
// |--|--|--|
// | | *| |
// |--|--|--|
// | | | |
// |--|--|--|

// pixel after the filter
// |--|--|--|
// | *| *| *|
// |--|--|--|
// | *| *| *|
// |--|--|--|
// | *| *| *|
// |--|--|--|



public BufferedImage dilate3(BufferedImage bi)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(3, 3, new float[] {

														1f, 1f, 1f, 

														1f, 1f, 1f, 

														1f, 1f, 1f

													 });

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}

Java - EdgeW / EdgeH

whitetiger () — Sat, 04 Nov 2006 00:23:26 GMT



public BufferedImage EdgeW(BufferedImage bi)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(3, 3, new float[] {

														-1f, 0f, 1f, 

														-2f, 0f, 2f, 

														-1f, 0f, 1f

													 });

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}



	public BufferedImage EdgeH(BufferedImage bi)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(3, 3, new float[] {

														-1f, -2f, -1f, 

														 0f,  0f,  0f, 

														 1f,  2f,   1f

													 });

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}

Java - Brightness

whitetiger () — Fri, 03 Nov 2006 13:21:49 GMT



public BufferedImage brightness(BufferedImage bi, float value)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(1, 1, new float[] {value});

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}

Java - ScreenShot

whitetiger () — Wed, 01 Nov 2006 19:01:23 GMT



import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.image.BufferedImage;

import java.io.File;



import javax.imageio.ImageIO;



public class screen2image

{

	public static void main(String[] args) throws Exception

	{

		Robot robot = new Robot();

		

		BufferedImage screenShot = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));

		ImageIO.write(screenShot, "JPG", new File("screenShot.jpg"));

	}

}

Java - ImageFilter Simple

whitetiger () — Wed, 01 Nov 2006 03:35:56 GMT

// Filtro Embrossing



	public BufferedImage Embrossing(BufferedImage bi)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(3, 3, new float[] {

														-2f, 0f, 0f, 

														 0f, 1f, 0f, 

														 0f, 0f, 2f

													 });

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}

// Filtro Blurring



	public BufferedImage Blurring(BufferedImage bi)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(3, 3, new float[] {

														1f/9f, 1f/9f, 1f/9f, 

														1f/9f, 1f/9f, 1f/9f, 

														1f/9f, 1f/9f, 1f/9f

													 });

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}

// Filtro Sharpening



	public BufferedImage Sharpening(BufferedImage bi)

	{

		BufferedImage buff = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());

		

		Kernel kernel = new Kernel(3, 3, new float[] {

														-1f, -1f, -1f, 

														-1f,  9f, -1f, 

														-1f, -1f, -1f

													 });

		

		ConvolveOp op = new ConvolveOp(kernel);

		op.filter(bi, buff);

		

		return buff;

	}

Java - Color2Gray

whitetiger () — Wed, 01 Nov 2006 02:46:51 GMT



public BufferedImage toGray(BufferedImage bi)

	{

		ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);

		ColorConvertOp op = new ColorConvertOp(cs, null);

		

		return op.filter(bi, null);

	}

Java - rotate -90°/90°

whitetiger () — Tue, 31 Oct 2006 05:06:38 GMT



public BufferedImage rotate90DX(BufferedImage bi)

	{

		int width = bi.getWidth();

		int height = bi.getHeight();

		

		BufferedImage biFlip = new BufferedImage(height, width, bi.getType());

		

		for(int i=0; i			for(int j=0; j				biFlip.setRGB(height-1-j, width-1-i, bi.getRGB(i, j));

		

		return biFlip;

	}



	public BufferedImage rotate90SX(BufferedImage bi)

	{

		int width = bi.getWidth();

		int height = bi.getHeight();

		

		BufferedImage biFlip = new BufferedImage(height, width, bi.getType());

		

		for(int i=0; i			for(int j=0; j				biFlip.setRGB(j, i, bi.getRGB(i, j));

		

		return biFlip;

	}