Filter RAMDAC with hardware 11/2-D zoom function

Details Filter RAMDAC with hardware 11/2-D zoom function Filter RAMDAC with hardware 11/2-D zoom function

1996-06-17

1998-06-30

Brier, Jeffery

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345138, G09G 500

Patent

active

057741107

ABSTRACT:
In a pixel based display system, zoom logic is added to the data stream of a RAMDAC. In the zoom logic, horizontal lines of image data are stored in locations spaced apart in an intermediate frame buffer. The horizontal scan lines are read into a single line buffer and then the data is read from the single line buffer to generate an enlarged display image. Digital filtering may be employed to generate interpolated values for pixels between the original values in the zoomed image.

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