Short for region of interest (ROI) coding it is a function supported by JPEG2000 it enables a non-uniform distribution of the image quality between a selected region (the ROI) and the rest of the image (background). 

ROI : Return on Investment

Determining return on investment requires a different way of looking at goals and factoring in the value of opportunity and competitive advantage. Increasingly, enterprises are drawn to the advantages of cloud services -- the flexibility, agility and "anytime, anywhere" business models enabled by the cloud are very attractive.