Pure Java alternative to JAI ImageIO for detecting CMYK images

Question

first I\'d like to explain the situation/requirements that lead to the question:

In our web application we can\'t support CMYK images (JPEG) since IE 8 and below can

Answer 1

I've posted a pure Java solution for reading all sorts of JPEG images and converting them to RGB.

It's built on the following facts:

• While ImageIO cannot read JPEG images with CMYK as a buffered image, it can read the raw pixel data (raster).
• Sanselan (or Apache Commons Imaging as it's called now) can be used to read the details of CMYK images.
• There are images with inverted CMYK values (an old Photoshop bug).
• There are images with YCCK instead of CMYK (can easily be converted).