Abstract Modern powerful personal computers, having memory sizes in the megabyte range are well suited for interactive image processing. User-friendly low-cost systems can strongly stimulate a widespread use of image processing. Aspects necessary for such systems are discussed: • The necessary image processing elements for such systems, • user interaction; command interpreter, macro command system and Window Management System. Two existing packages are described: TIM, which runs on an IBM personal computer and makes use of a commercially available frame grabber, and AIM, an educational (public domain) image processing package, which was originally developed for the Atari ST computer. Both packages share the philosophy that certain facilities are needed for an image processing program to be useful. Their origin is common: the Pattern Recognition group of the University of Technology in Delft. They differ in certain implementational aspects, but demonstrate clearly the possibilities of image processing with PCs.
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