void invert(ImagePlus imp) { Roi roi = imp.getRoi(); if (roi == null || !roi.isArea()) { IJ.error("Inverse", "Area selection required"); return; } ShapeRoi s1, s2; if (roi instanceof ShapeRoi) s1 = (ShapeRoi) roi; else s1 = new ShapeRoi(roi); s2 = new ShapeRoi(new Roi(0, 0, imp.getWidth(), imp.getHeight())); imp.setRoi(s1.xor(s2)); }
private void makeBand(ImagePlus imp) { Roi roi = imp.getRoi(); if (roi == null) { noRoi("Make Band"); return; } if (!roi.isArea()) { IJ.error("Make Band", "Area selection required"); return; } Calibration cal = imp.getCalibration(); double pixels = bandSize; double size = pixels * cal.pixelWidth; int decimalPlaces = 0; if ((int) size != size) decimalPlaces = 2; GenericDialog gd = new GenericDialog("Make Band"); gd.addNumericField("Band Size:", size, decimalPlaces, 4, cal.getUnits()); gd.showDialog(); if (gd.wasCanceled()) return; size = gd.getNextNumber(); if (Double.isNaN(size)) { IJ.error("Make Band", "invalid number"); return; } int n = (int) Math.round(size / cal.pixelWidth); if (n > 255) { IJ.error("Make Band", "Cannot make bands wider that 255 pixels"); return; } int width = imp.getWidth(); int height = imp.getHeight(); Rectangle r = roi.getBounds(); ImageProcessor ip = roi.getMask(); if (ip == null) { ip = new ByteProcessor(r.width, r.height); ip.invert(); } ImageProcessor mask = new ByteProcessor(width, height); mask.insert(ip, r.x, r.y); ImagePlus edm = new ImagePlus("mask", mask); boolean saveBlackBackground = Prefs.blackBackground; Prefs.blackBackground = false; IJ.run(edm, "Distance Map", ""); Prefs.blackBackground = saveBlackBackground; ip = edm.getProcessor(); ip.setThreshold(0, n, ImageProcessor.NO_LUT_UPDATE); int xx = -1, yy = -1; for (int x = r.x; x < r.x + r.width; x++) { for (int y = r.y; y < r.y + r.height; y++) { if (ip.getPixel(x, y) < n) { xx = x; yy = y; break; } } if (xx >= 0 || yy >= 0) break; } int count = IJ.doWand(edm, xx, yy, 0, null); if (count <= 0) { IJ.error("Make Band", "Unable to make band"); return; } ShapeRoi roi2 = new ShapeRoi(edm.getRoi()); if (!(roi instanceof ShapeRoi)) roi = new ShapeRoi(roi); ShapeRoi roi1 = (ShapeRoi) roi; roi2 = roi2.not(roi1); imp.setRoi(roi2); bandSize = n; }