package com.jrails.commons.image;
import java.io.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.Graphics;
import java.awt.color.ColorSpace;
import javax.imageio.ImageIO;
public class ChangeImageSize{
public static void scale(String srcImageFile, String result, int scale, boolean flag)
{
try
{
BufferedImage src = ImageIO.read(new File(srcImageFile));
int width = src.getWidth();
int height = src.getHeight();
if (flag)
{
width = width * scale;
height = height * scale;
}
else
{
width = width / scale;
height = height / scale;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
ImageIO.write(tag, "JPEG", new File(result));
}
catch (IOException e)
{
e.printStackTrace();
}
}
public static void cut(String srcImageFile, String descDir, int destWidth, int destHeight)
{
try
{
Image img;
ImageFilter cropFilter;
BufferedImage bi = ImageIO.read(new File(srcImageFile));
int srcWidth = bi.getHeight();
int srcHeight = bi.getWidth();
if (srcWidth > destWidth && srcHeight > destHeight)
{
Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT);
destWidth = 200;
destHeight = 150;
int cols = 0;
int rows = 0;
if (srcWidth % destWidth == 0)
{
cols = srcWidth / destWidth;
}
else
{
cols = (int) Math.floor(srcWidth / destWidth) + 1;
}
if (srcHeight % destHeight == 0)
{
rows = srcHeight / destHeight;
}
else
{
rows = (int) Math.floor(srcHeight / destHeight) + 1;
}
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
cropFilter = new CropImageFilter(j * 200, i * 150, destWidth, destHeight);
img = Toolkit.getDefaultToolkit().createImage(
new FilteredImageSource(image.getSource(), cropFilter));
BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(img, 0, 0, null);
g.dispose();
ImageIO.write(tag, "JPEG", new File(descDir + "pre_map_" + i + "_" + j + ".jpg"));
}
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
public static void convert(String source, String result)
{
try
{
File f = new File(source);
f.canRead();
f.canWrite();
BufferedImage src = ImageIO.read(f);
ImageIO.write(src, "JPG", new File(result));
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void gray(String source, String result)
{
try
{
BufferedImage src = ImageIO.read(new File(source));
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
ColorConvertOp op = new ColorConvertOp(cs, null);
src = op.filter(src, null);
ImageIO.write(src, "JPEG", new File(result));
}
catch (IOException e)
{
e.printStackTrace();
}
}
/** *//**
* @param args
*/
public static void main(String[] args)
{
scale("c:\\java\\1.jpg","C:\\java\\image.jpg",10,false);
}
}