java save an image in RAW format or so from a JPEG without loading its full contents

Question

I was wondering if it is possible to load a huge JPEG ( see my previous question there ) and save it / use it in a quickly-loadable format, without loading its fully decoded contents into memory.

The main idea is to have a file format (or a function I'm not aware of which would do that natively in Java) allowing to load dynamically a given area of the image, without loading 800MB of data.

I'm actually using a tiling algorithm to render the image, but it needs to load the full image (thanks to mKorbel and Gerard Le Blanc), but this "preloading" step remains quite long.

I don't figure out how to do that (and first of all, is it possible ?), since Google did not help me a lot (maybe bad-english searching ?)

Answer 1

I found what I needed there :

very large image manipulation and tiling

The Java JAI lib has a lot of features to handle these kind of problems, and is supported by Oracle, which means it is (theoretically) stable and sustainable.

Thanks to @BryanD !