/*
* Copyright 2013 Alibaba.com All right reserved. This software is the
* confidential and proprietary information of Alibaba.com ("Confidential
* Information"). You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license agreement you entered
* into with Alibaba.com.
*/
package com.alibaba.security.simpleimage.analyze.sift.scala;
import java.util.ArrayList;
import com.alibaba.security.simpleimage.analyze.sift.ImageMap;
/**
* 类OctavePyramid.java的实现描述：TODO 类实现描述
*
* @author axman 2013-3-25 上午11:08:38
*/
public class OctavePyramid {
boolean verbose = System.getProperty("_verbose") == null ? false : true;
public ArrayList<DScaleSpace> octaves;
public void setVerbose(boolean verbose) {
this.verbose = verbose;
}
public int count() {
return this.octaves.size();
}
public int buildOctaves(ImageMap source, double scale, int levelsPerOctave, double octaveSigm, int minSize) {
this.octaves = new ArrayList<DScaleSpace>();
DScaleSpace downSpace = null;
ImageMap prev = source;
while (prev != null && prev.xDim >= minSize && prev.yDim >= minSize) {
DScaleSpace dsp = new DScaleSpace();
dsp.verbose = verbose;
if (verbose) System.out.printf("Building octave, (%d, %d)\r\n", prev.xDim, prev.yDim);
// Create both the gaussian filtered images and the DoG maps
dsp.buildGaussianMaps(prev, scale, levelsPerOctave, octaveSigm);
dsp.buildDiffMaps();
octaves.add(dsp);
prev = dsp.getLastGaussianMap().scaleHalf();
if (downSpace != null) downSpace.up = dsp;
dsp.down = downSpace;
downSpace = dsp;
scale *= 2.0;
}
return (octaves.size());
}
}