JPEG 2000 .jpm file format: a layered imaging architecture for document imaging and basic animation on the web
Louis H. Sharpe, Robert Buckley · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
The JPEG 2000 compression standard includes several optional file formats called the JP family of file formats. One, the JPM file format (file extension:.jpm) is aimed at compression of compound images: those have multiple regions, each with differing requirements for spatial resolution and tonality. Document images are common instances of compound images. By applying multiple compression methods, each matched to the characteristics of a distinct region, significant compression advantages can be achieved over use of a single compression method for the entire image.