Digital Signal Processing Reference
In-Depth Information
D.2.2 File
Node.java
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Source Code
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public class Node {
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int x;
int y;
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Node(int x, int y) {
this.x = x;
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this.y = y;
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}
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void moveBy (int dx, int dy) {
x=x+dx;
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y=y+dy;
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}
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}
D.2.3 File
Contour.java
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import ij.IJ;
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import java.awt.Polygon;
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import java.awt.Shape;
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import java.awt.geom.Ellipse2D;
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import java.util.ArrayList;
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import java.util.Iterator;
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abstract class Contour {
// generic contour, never instantiated
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int label;
ArrayList<Node> nodes;
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Contour (int label, int initialSize) {
this.label = label;
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nodes = new ArrayList<Node>(initialSize);
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}
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void addNode (Node n){
nodes.add(n);
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}
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Shape makePolygon() {
int m = nodes.size();
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if (m>1){
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int[] xPoints = new int[m];
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int[] yPoints = new int[m];
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int k = 0;
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Iterator<Node> itr = nodes.iterator();
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while (itr.hasNext() && k < m) {
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Node cn = itr.next();
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