/** Mask central offset / low freq spike to better use display range. */
private void maskCentralRegion(ImagePlus imp) {
int w = imp.getWidth();
double d = this.maskDiameter * w;
if (w % 2 == 0) {
d += 1; // tweak to centre the mask about zero freq stripes
}
// N.B. we assume the image is square! (FFT result)
OvalRoi mask = new OvalRoi(w / 2 - d / 2 + 1, w / 2 - d / 2 + 1, d, d);
imp.setRoi(mask);
for (int c = 1; c <= imp.getNChannels(); c++) {
imp.setC(c);
double min = I1l.getStatsForChannel(imp, c).min;
IJ.run(imp, "Set...", "value=" + min + " slice");
}
imp.setC(1);
imp.deleteRoi();
}
private boolean deleteOverlayRoi(ImagePlus imp) {
if (imp == null) return false;
Overlay overlay = null;
ImageCanvas ic = imp.getCanvas();
if (ic != null) overlay = ic.getShowAllList();
if (overlay == null) overlay = imp.getOverlay();
if (overlay == null) return false;
Roi roi = imp.getRoi();
for (int i = 0; i < overlay.size(); i++) {
Roi roi2 = overlay.get(i);
if (roi2 == roi) {
overlay.remove(i);
imp.deleteRoi();
ic = imp.getCanvas();
if (ic != null) ic.roiManagerSelect(roi, true);
return true;
}
}
return false;
}