Tiff compression using Java ImageIO

Question

I am having issues converting a png to tiff. The conversion goes fine, but the image is huge. I think the issue is that I am not doing the compression correctly? Anyone h

Answer 1

I don't know Java IO, but generally you want to look at a few things

1. Can you use JPEG compression instead of LZW?
2. See how to set the TIFF strip size -- if small size is what you want, set it to the height of the image.

Edit: Looks like a TiffWriteParam has the following methods

tiffWriteParam.setTilingMode(ImageWriteParam.MODE_EXPLICIT);
tiffWriteParam.setTiling(imageWidth, imageHeight, 0, 0);

set the imageWidth and imageHeight vars to your image's size. The downside is that it will be slower to read out regions of the image.

Answer 2

Writer.getDefaultWriteParam() only creates an ImageWriteParam object, it doesn't link it back to anything else.

I don't see any mechanism in your code for your modified param object to be subsequently used in the ImageWriter.

I believe that instead of:

writer.write(bi);

you need to use:

writer.write(null, new IIOImage(bi, null, null), param);