Cursor generator for use in computerized tomography and other image display systems
A composite video signal waveform is fed through a video mixer and to a video monitor for displaying a raster scanned image on its screen. Signals are also fed through the mixer for causing a cursor having distinctive light intensity to be overlayed on the image. Programs for defining multiple cursors are stored in a readable memory. A microprocessor uses the programs for generating cursor parameters for each horizontal raster line and these are stored in a random access memory. A direct memory access controller responds to occurrence of each horizontal sync pulse by loading the cursor parameters for each corresponding raster line into counters which determine the starting point and end point of the cursor in that line or the width of the particular cursor line. During the interval representative of cursor line width, signals are fed through the mixer for altering the brightness intensity of the display. The random access memory is read out on a horizontal line-by-horizontal line b chosen metal dihalide vapor is ionized by ; the total economic market potential is 64.4% of the technical potential, or 2072.4 MW, equivalent to 83,621 BPDE; and the lack of an operating history-detailing system reliability, safety, and operating costs-iment and test components; technology testing; analytmperature fatigue stren obtained.
- Assignee:
- General Electric Co
- Patent Number(s):
- US 4259725
- Application Number:
- TRN: 81-018002
- OSTI ID:
- 6200965
- Resource Relation:
- Patent File Date: Filed date 1 Mar 1979
- Country of Publication:
- United States
- Language:
- English
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