System and method for scaling video

Details System and method for scaling video System and method for scaling video

1994-11-01

1998-08-04

Boudreau, Leo

Image analysis

Image transformation or preprocessing

Changing the image coordinates

358451, 348581, G06K 932

Patent

active

057907145

ABSTRACT:
Scaling of video is performed using area weighted averaging of input pixels to calculate coefficients to multiply with luminescence and crominence of input pixels. Such coefficients are produced for both the vertical and horizontal scaling directions of the input video stream. When scaling down or scaling up, scaling is first performed in the vertical direction to produce partially scaled pixels, which are then utilized for scaling in the horizontal direction. When scaling up, a pre-interpolation or pre-replication process is utilized to double the inputted pixel grid which doubled pixel grid is then utilized to scale down to the desired pixel grid size, which is greater than the originally inputted pixel grid size.

REFERENCES:
patent: 4633503 (1986-12-01), Hinman
patent: 4779135 (1988-10-01), Judd
patent: 4816913 (1989-03-01), Harney et al.
patent: 4885786 (1989-12-01), Anderson et al.
patent: 5289292 (1994-02-01), Osada et al.
patent: 5335295 (1994-08-01), Ferracini et al.

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