mediaframe.java

图像检索的代码b

/**
 * MediaFrame.java
 *
 * Created on 04. August 2003, 11:00
 *
 * Copyright (C) 2003 Markus Raab, Vienna University of Technology
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Contact address: [e-mail]
 */
package org.vizir.media;

import java.awt.image.BufferedImage;

/**
 * This class is represents one Frame of a MediaContent
 *
 * @author Markus Raab
 * @version $Id: MediaFrame.java,v 1.3 2004/02/12 09:20:27 mr Exp $
 */


public class MediaFrame {

  private int[] dataRGB = null;
  private int width=0;
  private int height=0;

  /**
   * Create a MediaFrame object of a BufferedImage.
   * @param image
   */
  public MediaFrame(BufferedImage image) {
    width = image.getWidth();
    height = image.getHeight();
    dataRGB = image.getRGB(0,0,width,height,null,0,width);
  }
  /**
   * Constructor with the image-data as byte array.
   * @param buffer byte array of MediaFrame-data
   * @param width with of the MediaFrame
   * @param height height of the MediaFrame
   */
  public MediaFrame(byte[] buffer, int width, int height) {

    this.width = width;
    this.height = height;
    int length=buffer.length;
    for (int i=0; i<length;i++)
      this.dataRGB[i] = (int)buffer[i];
  }

  /**
   * Constructor with the image-data as short array.
   * @param buffer array of MediaFrame-data
   * @param width with of the MediaFrame
   * @param height height of the MediaFrame
   */
  public MediaFrame(short[] buffer, int width, int height) {
    this.width = width;
    this.height = height;
    int length=buffer.length;
    for (int i=0; i<length;i++)
      this.dataRGB[i] = (int)buffer[i];
  }

  /**
   * Constructor with the image-data as int array.
   * @param buffer array of MediaFrame-data
   * @param width with of the MediaFrame
   * @param height height of the MediaFrame
   */
  public MediaFrame(int[] buffer, int width, int height) {
    this.width=width;
    this.height=height;
    this.dataRGB=buffer;
  }

  /**
   * Return one Pixel of the MediaFrame at the specified position.
   * @param x X-position of Pixel
   * @param y Y-position of Pixel
   * @return Pixel at specified position
   */
  public Pixel getPixelAt(int x, int y){
    int data=dataRGB[y*width+x];
    return Pixel.createFromInt(data,Pixel.NO_CONVERSION,0x00ff0000,0x0000ff00,0x000000ff);

  }

  /**
   * Return one Pixel of the MediaFrame at the specified position with the specified conversion
   * @param x X-position of the Pixel
   * @param y Y-position of the Pixel
   * @param conversion color space conversion
   * @return
   */
  public Pixel getPixelAt(int x, int y, int conversion){
    int data=dataRGB[y*width+x];
    return Pixel.createFromInt(data,conversion,0x00ff0000,0x0000ff00,0x000000ff);
  }

  /**
   * Return one component of the specified pixel
   * @param x X-position of the Pixel
   * @param y Y-position of the Pixel
   * @param componentMask Masking bits for component.
   * @return specified component of Pixel at x,y
   */
  public int getComponentAt(int x, int y, int componentMask){

    int componentShift = 0;
    if (componentMask != 0) while ((componentMask >> componentShift) % 2 == 0) componentShift++;
    return ((dataRGB[y*width+x] & componentMask) >> componentShift);

  }
  /**
   * Return the RGB-data of the MediaFrame as an int array. Each value represents one Pixel
   * @return
   */
  private int[] getDataRGB(){
    return dataRGB;
  }

  /**
   * Return the width of the MediaFrame
   * @return
   */
  public int getWidth(){
    return this.width;
  }

  /**
   * Return the height of the MediaFrame
   * @return
   */
  public int getHeight(){
    return this.height;
  }

  /**
   * return the length of the dataRGB array
   * @return
   */
  public int getLength(){
    return dataRGB.length;
  }
}