Re: ImageIO.write - compression

Just to ellucidate a little. I originally had code such as this shown
below. Whatever I pass into the setCompressionQuality() method (i.e. any of
0.05, 0.75, 0.95), results in a written file of 811kb, so I assumed this
code was bad. I don't see why tho.

The BufferedImage passed to this method is created with:

BufferedImage bi = ImageIO.read(new File(c.getInputFileName()));

public void myWrite(BufferedImage bi)
{
  Iterator writers = ImageIO.getImageWritersByFormatName("jpg");
  ImageWriter writer = (ImageWriter)writers.next();
  ImageWriteParam param = writer.getDefaultWriteParam();
  param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
  System.err.println("getCompressionType: " + param.getCompressionType());

  System.err.println("1 getCompressionQuality: " +
param.getCompressionQuality());
  param.setCompressionQuality(0.05f);
  System.err.println("2 getCompressionQuality: " +
param.getCompressionQuality());

  try {
    File ff = new File("c:/development/temp/xxx.jpg");
    ImageOutputStream ios = ImageIO.createImageOutputStream(ff);
    writer.setOutput(ios);
    writer.write(bi);
  } catch (IOException e) {
    e.printStackTrace();
  }
}

Many thanks

"Rupert Woodman" <NoEmail@com> wrote in message
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