Apparatus and method for correcting keystone distortion

Details Apparatus and method for correcting keystone distortion Apparatus and method for correcting keystone distortion

2006-01-03

2006-01-03

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C345S667000, C345S668000, C345S560000

Reexamination Certificate

active

06982730

ABSTRACT:
An apparatus and a method for correcting keystone distortions in a display system are disclosed. A horizontal size generator first receives N horizontal sync signals of an input image and generates N corresponding horizontal output sizes. Each of the output sizes is generated at each sync signal based on a horizontal input size, a vertical size, and a desired keystone factor or each of horizontal keystone offsets of the input image. A format converter then receives said input image and generates an output image. Each line of the output image now has the corresponding horizontal output size.

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patent: 5909205 (1999-06-01), Furuhashi et al.
patent: 6339434 (2002-01-01), West et al.
patent: 6411267 (2002-06-01), Narui

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