Abstract
A colour system has been developed for the EMI scanner incorporating a sixteen colour table with a selection of scale manipulation facilities. Features such as colour deletion and colour of interest pulsation are included and the output is available both in RGB (red, green, blue) form and PAL (phase alternation line by line) coded composite video form (625 line interlaced) to facilitate the use of a domestic television receiver (Boardman 1976). A digital processing unit, implemented in SSI (small scale integration) and MSI (medium scale integration) logic, is interfaced to the IVC (independent viewing centre) frame buffer memory. The unit is housed in a 19 inch cabinet on five standard Eurocards with three modular power supplies. The front panel provides a selection of switch options effecting instantaneous changes in the display. Digital information is processed in real time so that normal window and level variations are tracked by the colour display. The cost of the complete system was about Pounds 1800, and of this, Pounds 1000 was absorbed in the selection of a high quality RGB monitor (Sony PVM1300E).
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