import ij.plugin.filter.ThresholdToSelection; //导入依赖的package包/类
private Roi extractSelection(ImageProcessor maskIp, int maskId, int channel, int slice, int frame)
{
	maskIp.setThreshold(maskId, maskId, ImageProcessor.NO_LUT_UPDATE);
	ThresholdToSelection ts = new ThresholdToSelection();
	Roi roi = ts.convert(maskIp);
	if (imp.getStackSize() == 1)
	{
		roi.setPosition(0);
	}
	else if (imp.isDisplayedHyperStack())
	{
		if (showOverlay != 1)
			slice = 0; // Display across entire slice stack
		roi.setPosition(channel, slice, frame);
	}
	else
	{
		// We cannot support display across the entire stack if this is not a hyperstack
		int index = imp.getStackIndex(channel, slice, frame);
		roi.setPosition(index);
	}
	Rectangle roiBounds = roi.getBounds();
	roi.setLocation(bounds.x + roiBounds.x, bounds.y + roiBounds.y);
	return roi;
}
 

import ij.plugin.filter.ThresholdToSelection; //导入依赖的package包/类
/**
 * Create ROIs from labels in an image.
 * 
 * This differs from labelsToConnectedROIs in that the ROIs created may be
 * disconnected and contain holes.
 * 
 * @param ipLabels
 * @param n
 * @return
 */
public static Roi[] labelsToConnectedROIs(ImageProcessor ipLabels, int n) {
	Roi[] rois = new Roi[n];
	int w = ipLabels.getWidth();
	int h = ipLabels.getHeight();
	ByteProcessor bpCompleted = new ByteProcessor(w, h);
	bpCompleted.setValue(255);
	ThresholdToSelection tts = new ThresholdToSelection();
	for (int y = 0; y < h; y++) {
		for (int x = 0; x < w; x++) {
			if (bpCompleted.get(x, y) != 0)
				continue;
			float val = ipLabels.getf(x, y);
			if (val > 0 && val <= n) {
				Wand wand = new Wand(ipLabels);
				ipLabels.resetThreshold();
				wand.autoOutline(x, y, val, val, Wand.EIGHT_CONNECTED);
				Roi roi = wandToRoi(wand);
				
				// Check if ROI contains holes, and create if necessary
				ipLabels.setRoi(roi);
				ImageStatistics stats = ipLabels.getStatistics();
				if (stats.max != stats.min || rois[(int)val-1] != null) {
					ipLabels.setThreshold(val-0.25, val+0.25, ImageProcessor.NO_LUT_UPDATE);
					roi = tts.convert(ipLabels);
				}
				
				rois[(int)val-1] = roi;
				bpCompleted.fill(roi);
			}
		}
	}
	return rois;
}
 

import ij.plugin.filter.ThresholdToSelection; //导入依赖的package包/类
@SuppressWarnings("unused")
private double getPerimeter(ImageProcessor maskIp, int maskId, Overlay overlay, int z)
{
	maskIp.setThreshold(maskId, maskId, ImageProcessor.NO_LUT_UPDATE);
	ThresholdToSelection ts = new ThresholdToSelection();
	Roi roi = ts.convert(maskIp);
	if (overlay != null)
	{
		roi.setPosition(z);
		roi.setLocation(bounds.x, bounds.y);
		overlay.add(roi);
	}
	double perimeter = roi.getLength();
	return perimeter;
}