我試圖從ImagePlus
對象獲取RGB值。我得到一個異常錯誤,當我試圖做到這一點:ImageJ API:從圖像獲取RGB值
import ij.IJ;
import ij.ImagePlus;
import ij.plugin.filter.PlugInFilter;
import ij.process.ColorProcessor;
import ij.process.ImageProcessor;
import java.awt.image.IndexColorModel;
public class ImageHelper implements PlugInFilter {
public int setup(String arg, ImagePlus img) {
return DOES_8G + NO_CHANGES;
}
public void run(ImageProcessor ip) {
final int r = 0;
final int g = 1;
final int b = 2;
int w = ip.getWidth();
int h = ip.getHeight();
ImagePlus ips = new ImagePlus("C:\\Lena.jpg");
int width = ips.getWidth();
int height = ips.getHeight();
System.out.println("width of image: " + width + " pixels");
System.out.println("height of image: " + height + " pixels");
// retrieve the lookup tables (maps) for R,G,B
IndexColorModel icm = (IndexColorModel) ip.getColorModel();
int mapSize = icm.getMapSize();
byte[] Rmap = new byte[mapSize];
icm.getReds(Rmap);
byte[] Gmap = new byte[mapSize];
icm.getGreens(Gmap);
byte[] Bmap = new byte[mapSize];
icm.getBlues(Bmap);
// create new 24-bit RGB image
ColorProcessor cp = new ColorProcessor(w, h);
int[] RGB = new int[3];
for (int v = 0; v < h; v++) {
for (int u = 0; u < w; u++) {
int idx = ip.getPixel(u, v);
RGB[r] = Rmap[idx];
RGB[g] = Gmap[idx];
RGB[b] = Bmap[idx];
cp.putPixel(u, v, RGB);
}
}
ImagePlus cwin = new ImagePlus("RGB Image", cp);
cwin.show();
}
}
的異常是從該行正在添加:
IndexColorModel icm = (IndexColorModel) ip.getColorModel();
例外:螺紋
異常「主要的」 java .lang.ClassCastException: java.awt.image.DirectColorModel無法轉換爲 java.awt.image.IndexColorModel
...任何想法?^_^