SURFInterestPoint.java

package com.alibaba.simpleimage.analyze.harissurf;

import java.util.Arrays;

import com.alibaba.simpleimage.analyze.search.cluster.Clusterable;

public class SURFInterestPoint implements Cloneable,InterestPoint,Clusterable {
	private static final long serialVersionUID = 1L;

	private float mX,mY;
	
	private float mScale;
	
	private float mOrientation;
	
	private int mLaplacian;
	
	private float[] mDescriptor;
	
	private float mDx,mDy;
	
	private int mClusterIndex;
	
	public SURFInterestPoint(float x, float y, float scale, int laplacian){
		mX = x;
		mY = y;
		mScale = scale;
		mLaplacian = laplacian;
	}
	
	public float getX() {
		return mX;
	}

	public float getY() {
		return mY;
	}

	public float getScale() {
		return mScale;
	}

	public float getOrientation() {
		return mOrientation;
	}

	public void setOrientation(float orientation) {
		mOrientation = orientation;
	}

	public int getLaplacian() {
		return mLaplacian;
	}

	public float[] getDescriptor() {
		return mDescriptor;
	}
	
	/**
	 * To take care of the InterestPoint Interface
	 */
	public float[] getLocation() {
		return mDescriptor;
	}

	public void setDescriptor(float[] descriptor) {
		mDescriptor = descriptor;
	}

	public float getDx() {
		return mDx;
	}

	public void setDx(float dx) {
		mDx = dx;
	}

	public float getDy() {
		return mDy;
	}

	public void setDy(float dy) {
		mDy = dy;
	}

	public int getClusterIndex() {
		return mClusterIndex;
	}

	public void setClusterIndex(int clusterIndex) {
		mClusterIndex = clusterIndex;
	}
	
	public double getDistance(InterestPoint point){
		float sum = 0;
		float[] location = point.getLocation();
		if ( location == null || mDescriptor == null ) return Float.MAX_VALUE;
		
		for ( int i = 0; i < mDescriptor.length; i++ ){
			double diff = mDescriptor[i] - location[i];
			sum += diff*diff; 
		}
		return sum;
		//return (double)Math.sqrt(sum);
	}

	public Float getCoord(int dimension) {
		return mDescriptor[dimension];
	}

	public int getDimensions() {
		return mDescriptor.length;
	}

    public Object clone() throws CloneNotSupportedException {
            return super.clone();
    }
    
    public boolean isEquivalentTo(SURFInterestPoint point){
    	boolean isEquivalent = true;
    	
    	isEquivalent &= mX == point.getX();
    	isEquivalent &= mY == point.getY();
    	
    	isEquivalent &= mDx == point.getDx();
    	isEquivalent &= mDy == point.getDy();
    	
    	isEquivalent &= mOrientation == point.getOrientation();
    	
    	isEquivalent &= mScale == point.getScale();
    	
    	isEquivalent &= mLaplacian == point.getLaplacian();
    	
    	isEquivalent &= Arrays.equals(mDescriptor,point.getDescriptor());
    	
    	return isEquivalent;
    }
    
    public String getDescriptorString()
    {
    	StringBuilder sb= new StringBuilder();
    	for(float descriptor : mDescriptor)
    	{
    		sb.append(descriptor);
    		sb.append(",");
    	}
    	return sb.toString();
    }
}