Non-linear interline flicker reducer

Details Non-linear interline flicker reducer Non-linear interline flicker reducer

1995-09-12

1998-10-27

Luu, Matthew

Computer graphics processing and selective visual display system

Display driving control circuitry

348910, G09G 500

Patent

active

058283668

ABSTRACT:
An apparatus and method for improving the display of progressively scanned images on displays that employ an interlace display technique. The apparatus comprises a vertical filter and a clipper. An input image is vertically low-pass and high-pass filtered through the vertical filter. The resulting high-pass signal is passed through the clipper such that a non-linear transfer function limits the maximum value that is permitted to pass through the clipper. The "clipped" high-pass signal is then recombined with the low-pass signal to reconstruct a flicker-reduced image. In this fashion, interline flicker is reduced while maintaining the full resolution of natural images.

REFERENCES:
patent: 4015076 (1977-03-01), Ishiodori
patent: 4961113 (1990-10-01), Okada et al.
patent: 4962426 (1990-10-01), Naoi et al.
patent: 5136385 (1992-08-01), Campbell

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