Scaling image signals using horizontal and vertical scaling

Details Scaling image signals using horizontal and vertical scaling Scaling image signals using horizontal and vertical scaling

1994-06-03

1997-04-08

Saras, Steven

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

348580, G09G 500

Patent

active

056192266

ABSTRACT:
Image signals corresponding to a first row of the image are horizontally scaled and stored in an external memory device. A first portion of the horizontally scaled first-row image signals are retrieved from the external memory device and stored in an internal memory device. Image signals corresponding to a first portion of a second row of the image are horizontally scaled and partially vertically scaled first-portion image signals are generated from the first portion of the horizontally scaled first-row image signals and the first portion of the horizontally scaled second-row image signals. The partially vertically scaled first-portion image signals are stored in the external memory device. A second portion of the horizontally scaled first-row image signals are retrieved from the external memory device and stored in the internal memory device. Image signals corresponding to a second portion of the second row of the image are horizontally scaled and partially vertically scaled second-portion image signals are generated from the second portion of the horizontally scaled first-row image signals and the second portion of the horizontally scaled second-row image signals. The partially vertically scaled second-portion image signals are stored in the external memory device.

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