如何将tif转换成png或jpg


jimi下载地址:
http://java.sun.com/products/jimi/ 我使用的是jimi1.0但是转换大的tif时会出错,内存溢出.
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
原本195K的tif只有一页,转换成png后大小为1377kb如需源tif文件的请发邮件到[email protected]各位大哥帮帮忙啊,小弟现在实在是没分....    public static void main(String[] args) throws JimiException, IOException
    {
        String strfile="F:\\TiffConvert\\963347528002OR.tif";
        //String strfile = "f:\\TiffConvert\\705221558.tif";        toPNG(strfile, "f:\\TiffConvert\\0003", 10);
        
        changeDimension("f:\\TiffConvert\\0003.png", "f:\\TiffConvert\\0003_new.png", 0.9);    }    public static void toPNG(String source, String dest, int quality)
    {
        if (dest == null || dest.trim().equals(""))
            dest = source;
        if (!dest.toLowerCase().trim().endsWith("png"))
        {
            dest += ".png";
            System.out.println("Overriding to JPG, output file: " + dest);
        }
        if (quality < 0 || quality > 100 || (quality + "") == null || (quality + "").equals(""))
        {
            System.out.println("quality must between ’0’ and ’100’");
            System.out.println("set to DEFAULT value:’75’");
            quality = 75;
        }
        try
        {
            JPGOptions options = new JPGOptions();
            options.setQuality(quality);
            ImageProducer image = Jimi.getImageProducer(source);
            //System.out.println();
            
            JimiWriter writer = Jimi.createJimiWriter(dest);
            writer.setSource(image);
            writer.setOptions(options);
            writer.putImage(dest);
        } catch (JimiException je)
        {
            System.err.println("Error: " + je);
        }
    }    public static void changeDimension(String source, String desc, double ins) throws JimiException, IOException
    {
        File _file = null;
        if (desc == null || desc.trim().equals(""))
        {
            desc = source;
        }
        _file = new File(source); // 读入文件
        ImageInputStream iis=new FileImageInputStream(_file);
        //javax.imageio.ImageIO.setUseCache(true);
        //Image src = javax.imageio.ImageIO.read(_file); // 构造Image对象
        //BufferedImage src = ImageIO.read(_file); // 构造Image对象
        BufferedImage src = ImageIO.read(iis);
        double wideth = (double) src.getWidth(null); // 得到源图宽
        double height = (double) src.getHeight(null); // 得到源图长
        int iWideth = (int) (wideth * ins);
        int iHeight = (int) (height * ins);
        BufferedImage tag = new BufferedImage(iWideth, iHeight, BufferedImage.TYPE_INT_RGB);
        tag.getGraphics().drawImage(src, 0, 0, iWideth, iHeight, null); // 绘制缩小后的图
        if (!source.trim().equals(desc))
            _file.deleteOnExit();        JimiWriter writer = Jimi.createJimiWriter(desc);
        writer.setSource(tag);
        writer.putImage(desc);    }