Mistral is a high-level imaging engine for the Java� Standard Edition platform (J2SE). It has been designed as an abstraction layer over the real imaging engine, that can be freely choosen among one of the most popular around (e.g. JAI, ImageJ), thus allowing the programmer to focus on the algorithm, without wasting time on implementation details - a sort of extension of the WORA (Write Once, Run Anywhere) concept. Mistral goes even further, by providing a simple-but-effective ImagingProcessor which is able to schedule well-written image processing algorithms in different computing scenarios: from the single CPU, to the multi-core, up to the Sun Grid Computing Facility. Also cheap, local multiple node clusters based on Jini� and Rio technologies are supported.