Digital Signal Processing Reference
In-Depth Information
D.2 Kombinierte
Regionenmarkierung-Konturverfolgung
D.2
Kombinierte
Regionenmarkierung-
Konturverfolgung
Vollstandiger Quellcode als Erganzung zur Beschreibung in Abschn.11.2.
D.2.1 File
ContourTracingPlugin .java
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import ij.IJ;
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import ij.ImagePlus;
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import ij.gui.ImageWindow;
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import ij.plugin.filter.PlugInFilter;
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import ij.process.ImageProcessor;
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// Uses the
ContourTracer
class to create an ordered list
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// of points representing the internal and external contours
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// of each region in the binary image. Instead of drawing
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// directly into the image, we make use of ImageJ's ImageCanvas
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// to draw the contours in a layer ontop of the image.
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// Illustrates how to use the Java2D api to draw the
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// polygons and scale and transform them to match ImageJ's
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// zooming.
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public class ContourTracingPlugin_ implements PlugInFilter {
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public int setup(String arg, ImagePlus imp) {
return DOES_8G + NO_CHANGES;
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}
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public void run(ImageProcessor ip) {
ImageProcessor ip2 = ip.duplicate();
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// trace the contours and get the ArrayList
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ContourTracer tracer = new ContourTracer(ip2);
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ContourSet cs = tracer.getContours();
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//contours.print();
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// change lookup-table to show gray regions
ip2.setMinAndMax(0,512);
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ImagePlus imp =
new ImagePlus("Contours of " + IJ.getImage().getTitle(),
ip2);
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ContourOverlay cc = new ContourOverlay(imp, cs);
new ImageWindow(imp, cc);
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}
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}
