Image reduction and enlargement processing

Details Image reduction and enlargement processing Image reduction and enlargement processing

1997-11-25

2000-10-31

Lee, Michael H.

Television

Image signal processing circuitry specific to television

Special effects

348441, 345127, 382300, H04N 974

Patent

active

061410616

ABSTRACT:
When image reduction is effected at the writing of the image to a frame memory, a first image portion which is to be dropped by the reduction is subjected to weighted-averaging with a second image portion adjacent thereto to modify the second image portion. When an image read from the frame memory is enlarged, a first image portion which is to be added by the enlargement is generated by weighted-averaging two second image portions located before and after the first image portion. When an image is enlarged, it is enlarged by a first enlargement factor in the range of 1 to 2 and enlarged by a second enlargement factor that is an integer, thereby obtaining a result image enlarged by a third enlargement factor that is the product of the first and second enlargement factors.

REFERENCES:
patent: 5283651 (1994-02-01), Ishizuka
patent: 5343238 (1994-08-01), Takata et al.
patent: 5353067 (1994-10-01), Kaji

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