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import ij.plugin.*;
import ij.process.*;
import ij.gui.*;
import ij.*;
import java.awt.image.*;
///Plugin implementing the classic glow/hot
///LUT which seems to be missing from ImageJ
///@ingroup gPlugin
public class ClassicGlow implements PlugIn
{
static byte red[];
static byte green[];
static byte blue[];
static{
red = new byte[256];
green = new byte[256];
blue = new byte[256];
for(int i=0; i < 256; i++)
{
if(i < 85)
red[i] = (byte)((i*3) & 0xff);
else
red[i] = (byte)(255 & 0xff);
if(i < 85)
green[i] = 0;
else if(i -85 < 85)
green[i] = (byte)(((i-85)*3) & 0xff);
else
green[i] = (byte)(255 & 0xff);
if(i < 170)
blue[i] = 0;
else
blue[i] = (byte)(((i-170)*3) & 0xff);
}
}
public void run(String arg)
{
ImagePlus imp = WindowManager.getCurrentImage();
//If the image exists, it must be of the correct type, otherwise, make a ramp.
if (imp!=null)
{
if (imp.getType()==ImagePlus.COLOR_RGB)
{
IJ.error("Color tables cannot be assiged to RGB Images.");
return;
}
}
else
{
//Create a ramp
ByteProcessor r = new ByteProcessor(256, 32);
for(int y=0; y < 32; y++)
for(int x=0; x < 256; x++)
r.set(x, y, x);
imp = new ImagePlus("Glow", r);
imp.show();
}
ImageProcessor ip = imp.getProcessor();
ColorModel cm = new IndexColorModel(8, 256, red, green, blue);
ip.setColorModel(cm);
if (imp.getStackSize()>1)
imp.getStack().setColorModel(cm);
imp.updateAndDraw();
}
}
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