Digital Signal Processing Reference
In-Depth Information
D.1.2 File
HarrisCornerDetector.java
D.1
Harris Corner Detector
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import ij.IJ;
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import ij.ImagePlus;
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import ij.plugin.filter.Convolver;
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import ij.process.Blitter;
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import ij.process.ByteProcessor;
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import ij.process.FloatProcessor;
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import ij.process.ImageProcessor;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.Vector;
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public class HarrisCornerDetector {
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public static final float DEFAULT_ALPHA = 0.050f;
public static final int DEFAULT_THRESHOLD = 20000;
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float alpha = DEFAULT_ALPHA;
int threshold = DEFAULT_THRESHOLD;
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double dmin = 10;
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final int border = 20;
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//filter kernels (one-dim. part of separable 2D filters)
final float[] pfilt = {0.223755f,0.552490f,0.223755f};
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final float[] dfilt = {0.453014f,0.0f,-0.453014f};
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final float[] bfilt = {0.01563f,0.09375f,0.234375f,0.3125f
,0.234375f,0.09375f,0.01563f};
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// = 1,6,15,20,15,6,1/64
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ImageProcessor ipOrig;
FloatProcessor A;
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FloatProcessor B;
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FloatProcessor C;
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FloatProcessor Q;
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Vector<Corner> corners;
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HarrisCornerDetector(ImageProcessor ip){
this.ipOrig = ip;
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}
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HarrisCornerDetector(ImageProcessor ip, float alpha, int
threshold){
this.ipOrig = ip;
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this.alpha = alpha;
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this.threshold = threshold;
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}
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