Convert rgb to cmyk

package cmykrgb;

import java.awt.image.*;

import java.awt.color.*;

import java.awt.event.*;

import java.awt.*;

import java.io.*;

import java.net.*;

import com.sun.image.codec.jpeg.*;

import com.sun.glf.util.Toolbox;

/** * This program reads an RGB JPEG image and converts it to a CMYK image. Optionally,

* it can can invert the CMYK components before saving the image as some popular

* image tools use inverted value for the CMYK components.

*

* @author Vincent Hardy * @version1.0, 02/01/1999

*/

public class CMYKSave{

static final String USAGE = "java com.sun.glf.snippets.CMYKSave C:/WINDOWS/Escritorio/Jaicmm/CMYK.pf C:/WINDOWS/Escritorio/imagenes/fondo grde con simb_copei.jpg C:/WINDOWS/Escritorio/1.jpg true";

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

System.out.println(args.length);

/*if(args.length<4){

System.out.println(USAGE);

System.exit(0);

}

String cmykProfile = args[0];

String rgbJPEGFile = args[1];

String cmykJPEGFile = args[2];

boolean invert = "true".equalsIgnoreCase(args[3]);*/

String cmykProfile = "C:/WINDOWS/Escritorio/Jaicmm/CMYK.pf";

String rgbJPEGFile = "C:/WINDOWS/Escritorio/imagenes/1.jpg";

String cmykJPEGFile = "C:/WINDOWS/Escritorio/imagenes/fondo grde con simb_copei.jpg";

boolean invert = false;

//

// First, load input image

//

System.out.println("llego");

JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(new FileInputStream(rgbJPEGFile));

BufferedImage rgbImage = decoder.decodeAsBufferedImage();

// Create a CMYK Color Space from cmykProfile

ICC_Profile p = ICC_Profile.getInstance(new FileInputStream(cmykProfile)); //*************************

ColorSpace cmykCS = new ICC_ColorSpace(p); //*************************

OutputStream out = new FileOutputStream(cmykJPEGFile);

// ColorConvert rgbImage to CMYK

ColorSpace rgbCS = rgbImage.getColorModel().getColorSpace();

ColorConvertOp rgbToCmyk = new ColorConvertOp(rgbCS, cmykCS, null);

// Create a ColorModel for destination CMYK image

ColorModel cmykModel = new ComponentColorModel(cmykCS,

new int[] { 8, 8, 8, 8 }, // 8 bits for each C, M, Y, K

false, true, // No alpha

Transparency.OPAQUE,

DataBuffer.TYPE_BYTE);

WritableRaster cmykRaster = cmykModel.createCompatibleWritableRaster(rgbImage.getWidth(),

rgbImage.getHeight());

// Convert to CMYK now

rgbToCmyk.filter(rgbImage.getRaster(), cmykRaster);

// Invert components before saving if requested

if(invert){

System.out.println("Inverting CMYK bands");

byte swap[] = new byte[256];

for(int i=0; i<swap.length; i++){

swap = (byte)(255-i);

}

LookupTable lookup = new ByteLookupTable(0, new byte[][] { swap, swap, swap, swap });

LookupOp luop = new LookupOp(lookup, null);

cmykRaster = luop.filter(cmykRaster, cmykRaster.createCompatibleWritableRaster());

}

// Finally, save CMYK raster

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(cmykRaster, JPEGDecodeParam.COLOR_ID_CMYK);

param.setQuality(1, false);

encoder.encode(cmykRaster, param);

out.close();

System.out.println("Image saved successfully in " + cmykJPEGFile);

}

try {

// -- Convert RGBA to CMYK

// -- because JAI reads CMYK as RGBA

ICC_Profile cmyk_profile = ICC_Profile.getInstance("C:/Documents and Settings/rsornes/Desktop/jai/CMYK.pf");

ICC_ColorSpace cmyk_icp = new ICC_ColorSpace(cmyk_profile);

ColorModel cmyk_cm =

RasterFactory.createComponentColorModel(op.getSampleModel().getDataType(),

cmyk_icp,

false,

true,

Transparency.OPAQUE);

ImageLayout cmyk_il = new ImageLayout();

cmyk_il.setColorModel(cmyk_cm);

RenderingHints cmyk_hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, cmyk_il);

ParameterBlockJAI pb = new ParameterBlockJAI("format");

pb.addSource(op);

pb.setParameter("datatype", op.getSampleModel().getDataType());

op = JAI.create("format", pb, cmyk_hints);

// -- Convert CMYK to RGB

ColorSpace rgb_icp = ColorSpace.getInstance(ColorSpace.CS_sRGB );

ColorModel rgb_cm =

RasterFactory.createComponentColorModel(op.getSampleModel().getDataType(),

rgb_icp,

false,

true,

Transparency.OPAQUE);

ImageLayout rgb_il = new ImageLayout();

rgb_il.setSampleModel(rgb_cm.createCompatibleSampleModel(op.getWidth(),

op.getHeight()));

RenderingHints rgb_hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, rgb_il);

pb = new ParameterBlockJAI("colorconvert");

pb.addSource(op);

pb.setParameter("colormodel", rgb_cm);

op = JAI.create("colorconvert", pb, rgb_hints);

} catch(Exception ex) {

ex.printStackTrace();

}

}

PD: you kwon how i can convert the image CMYK to RGB...please HELP>

rsornesa at 2007-7-16 6:13:29 >