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package ij.plugin.filter;
import ij.*;
import ij.gui.*;
import ij.process.*;
import java.awt.*;
/** This plugin implements the Invert, Smooth, Sharpen, Find Edges,
and Add Noise commands. */
public class Filters implements PlugInFilter {
private static double sd = Prefs.getDouble(Prefs.NOISE_SD, 25.0);
private String arg;
private ImagePlus imp;
private int slice;
private boolean canceled;
public int setup(String arg, ImagePlus imp) {
this.arg = arg;
this.imp = imp;
if (imp!=null) {
Roi roi = imp.getRoi();
if (roi!=null && !roi.isArea())
imp.deleteRoi(); // ignore any line selection
}
int flags = IJ.setupDialog(imp, DOES_ALL-DOES_8C+SUPPORTS_MASKING);
if ((flags&PlugInFilter.DOES_STACKS)!=0 && imp.getType()==ImagePlus.GRAY16 && imp.getStackSize()>1 && arg.equals("invert")) {
invert16BitStack(imp);
return DONE;
}
return flags;
}
public void run(ImageProcessor ip) {
if (arg.equals("invert")) {
ip.invert();
return;
}
if (arg.equals("smooth")) {
ip.setSnapshotCopyMode(true);
ip.smooth();
ip.setSnapshotCopyMode(false);
return;
}
if (arg.equals("sharpen")) {
ip.setSnapshotCopyMode(true);
ip.sharpen();
ip.setSnapshotCopyMode(false);
return;
}
if (arg.equals("edge")) {
ip.setSnapshotCopyMode(true);
ip.findEdges();
ip.setSnapshotCopyMode(false);
return;
}
if (arg.equals("add")) {
ip.noise(25.0);
return;
}
if (arg.equals("noise")) {
if (canceled)
return;
slice++;
if (slice==1) {
GenericDialog gd = new GenericDialog("Gaussian Noise");
gd.addNumericField("Standard Deviation:", sd, 2);
gd.showDialog();
if (gd.wasCanceled()) {
canceled = true;
return;
}
sd = gd.getNextNumber();
}
ip.noise(sd);
IJ.register(Filters.class);
return;
}
}
void invert16BitStack(ImagePlus imp) {
imp.deleteRoi();
imp.getCalibration().disableDensityCalibration();
ImageStatistics stats = new StackStatistics(imp);
ImageStack stack = imp.getStack();
int nslices = stack.getSize();
int min=(int)stats.min, range=(int)(stats.max-stats.min);
int n = imp.getWidth()*imp.getHeight();
for (int slice=1; slice<=nslices; slice++) {
ImageProcessor ip = stack.getProcessor(slice);
short[] pixels = (short[])ip.getPixels();
for (int i=0; i<n; i++) {
int before = pixels[i]&0xffff;
pixels[i] = (short)(range-((pixels[i]&0xffff)-min));
}
}
imp.setStack(null, stack);
imp.setDisplayRange(0, range);
imp.updateAndDraw();
}
/** Returns the default standard deviation used by Process/Noise/Add Specified Noise. */
public static double getSD() {
return sd;
}
}
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