Digital Signal Processing Reference
In-Depth Information
for (int u=border; u<w-border; u++) {
D.1
Harris Corner Detector
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float q = Qpix[v*w+u];
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if (q>threshold && isLocalMax(Q,u,v)) {
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Corner c = new Corner(u,v,q);
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cornerList.add(c);
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}
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}
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}
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Collections.sort(cornerList);
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return cornerList;
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}
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108
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Vector<Corner> cleanupCorners(Vector<Corner> corners){
double dmin2 = dmin*dmin;
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Corner[] cornerArray = new Corner[corners.size()];
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cornerArray = corners.toArray(cornerArray);
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Vector<Corner> goodCorners = new Vector<Corner>(corners.
size());
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for (int i=0; i<cornerArray.length; i++){
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if (cornerArray[i] != null){
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Corner c1 = cornerArray[i];
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goodCorners.add(c1);
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//delete all remaining corners close to c
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for (int j=i+1; j<cornerArray.length; j++){
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if (cornerArray[j] != null){
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Corner c2 = cornerArray[j];
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if (c1.dist2(c2)<dmin2)
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cornerArray[j] = null;
//delete corner
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}
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}
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}
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}
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return goodCorners;
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}
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void printCornerPoints(Vector crf){
Iterator it = crf.iterator();
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for (int i=0; it.hasNext(); i++){
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Corner ipt = (Corner) it.next();
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IJ.write(i + ": " + (int)ipt.q + " " + ipt.u + " " + ipt.
v);
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}
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}
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ImageProcessor showCornerPoints(ImageProcessor ip){
ByteProcessor ipResult = (ByteProcessor)ip.duplicate();
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//change background image contrast and brightness
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int[] lookupTable = new int[256];
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for (int i=0; i<256; i++){
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lookupTable[i] = 128 + (i/2);
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}
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