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Show Page 6 DEANZA SYSTEMS DeAnza quoted a 16-bit pseudo-color IP5516 system at about 140,000 and a 24-bit real color IP5524 system at about $52,000. The DeAnza systems are well constructed and extremely strong in realtime image processing. Unique among the systems studied, DeAnza provides significant vide rate arithmetic processing. 512 by 512 8-bit 1mage memory channels can be added, subtracted, compared, or shifted in one frame time (1/30 second). Multiplication and division take 9 and 17 frame times, respectively. A 51 by 51 convolution can be done in less than 90 seconds. DeAnza estimates _that this computation would take 20 minutes on an un augmented minicomputer. The primary use of image processing in our applications would be filtering of syntesized images to remove aliasing, or "jagg{es." This tends to involve only rather small convolutions. Applicationa dealing with large convolutions might make image processing appear the most important selection factor. Our selection criteria concentrate more on memory depth cost, and display versatility. The architecture of the DeAnza host computer interface favors the PDP-II computer. A 4K word address space window is divided into 512 byte sections. Sections are individually controlled by location, mode, and mask registers in the PDP-II I/O page. Location register auto increment .nd decrement are |
