Digital Signal Processing Reference
In-Depth Information
12.1
RGB-Farbbilder
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// File
IDXtoRGB_.java
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import ij.ImagePlus;
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import ij.plugin.filter.PlugInFilter;
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import ij.process.ColorProcessor;
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import ij.process.ImageProcessor;
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import java.awt.image.IndexColorModel;
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public class IDXtoRGB_ implements PlugInFilter {
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Programm 12.4
Konvertierung eines Indexbilds in ein
RGB-Vollfarbenbild (ImageJ-Plugin).
static final int R = 0, G = 1, B = 2;
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public void run(ImageProcessor ip) {
int w = ip.getWidth();
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int h = ip.getHeight();
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//retrieve the lookup tables (maps) for R,G,B
IndexColorModel icm =
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(IndexColorModel) ip.getColorModel();
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int mapSize = icm.getMapSize();
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byte[] Rmap = new byte[mapSize]; icm.getReds(Rmap);
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byte[] Gmap = new byte[mapSize]; icm.getGreens(Gmap);
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byte[] Bmap = new byte[mapSize]; icm.getBlues(Bmap);
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//create new 24-bit RGB image
ColorProcessor cp = new ColorProcessor(w,h);
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int[] RGB = new int[3];
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for (int v = 0; v < h; v++) {
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for (int u = 0; u < w; u++) {
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int idx = ip.getPixel(u, v);
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RGB[R] = Rmap[idx];
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RGB[G] = Gmap[idx];
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RGB[B] = Bmap[idx];
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cp.putPixel(u, v, RGB);
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}
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}
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ImagePlus cwin = new ImagePlus("RGB Image",cp);
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cwin.show();
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}
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public int setup(String arg, ImagePlus imp) {
return DOES_8C + NO_CHANGES;
//does not alter original image
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}
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}
