root / trunk / libraries / libCq_CMS_praster / src / org / cresques / filter / statistics / ComputeMinMaxImageFilter.java @ 8026
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/*
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* Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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*
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* Copyright (C) 2004-5.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* cresques@gmail.com
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*/
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package org.cresques.filter.statistics; |
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import java.awt.Image; |
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import java.awt.image.BufferedImage; |
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import org.cresques.io.data.RasterBuf; |
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/**
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* Clase base para los filtros de calculo de m?ximo y m?nimo en sus diferentes
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* tipos de datos.
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*/
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public class ComputeMinMaxImageFilter extends ComputeMinMaxFilter { |
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/**
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* Constructor
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*
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*/
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public ComputeMinMaxImageFilter() {
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super();
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#pre()
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*/
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public void pre() { |
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//Obtenci?n de par?metros
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this.image = (Image) params.get("raster"); |
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height = image.getHeight(null);
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width = image.getWidth(null);
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super.pre();
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} |
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/**
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* Calcula el m?nimo y el m?ximo y lo salva sobre las variables de instancia min, max,
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* @param px
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*/
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private void calcMinMax(int px){ |
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int pxBand = ((px & 0xff0000) >> 16); |
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if (pxBand < min[0]) { |
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secondMin[0] = min[0]; |
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min[0] = pxBand;
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} else if ((pxBand < secondMin[0]) && (pxBand != min[0])) { |
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secondMin[0] = pxBand;
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} |
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if (pxBand > max[0]) { |
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secondMax[0] = max[0]; |
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max[0] = pxBand;
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} else if ((pxBand > secondMax[0]) && (pxBand != max[0])) { |
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secondMax[0] = pxBand;
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} |
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pxBand = ((px & 0x00ff00) >> 8); |
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if (pxBand < min[1]) { |
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secondMin[1] = min[1]; |
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min[1] = pxBand;
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} else if ((pxBand < secondMin[1]) && (pxBand != min[1])) { |
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secondMin[1] = pxBand;
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} |
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if (pxBand > max[1]) { |
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secondMax[1] = max[1]; |
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max[1] = pxBand;
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} else if ((pxBand > secondMax[1]) && (pxBand != max[1])) { |
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secondMax[1] = pxBand;
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} |
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pxBand = (px & 0x0000ff);
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if (pxBand < min[2]) { |
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secondMin[2] = min[2]; |
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min[2] = pxBand;
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} else if ((pxBand < secondMin[2]) && (pxBand != min[2])) { |
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secondMin[2] = pxBand;
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} |
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if (pxBand > max[2]) { |
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secondMax[2] = max[2]; |
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max[2] = pxBand;
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} else if ((pxBand > secondMax[2]) && (pxBand != max[2])) { |
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secondMax[2] = pxBand;
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} |
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#process(int, int)
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*/
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public void process(int col, int line) { |
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int px = ((BufferedImage) image).getRGB(col, line); |
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calcMinMax(px); |
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#processSuperSampling(int, int)
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*/
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public void processSuperSampling(int col, int line) { |
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process(col, line); |
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#getInRasterDataType()
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*/
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public int getInRasterDataType() { |
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return RasterBuf.TYPE_IMAGE;
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#getOutRasterDataType()
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*/
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public int getOutRasterDataType() { |
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return RasterBuf.TYPE_IMAGE;
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#post()
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*/
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public void post() { |
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super.post();
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.RasterFilter#processLine(int)
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*/
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public void processLine(int y) { |
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} |
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} |