Image resolution conversion method and appratus thereof

Details Image resolution conversion method and appratus thereof Image resolution conversion method and appratus thereof

1996-03-18

1998-05-19

Mancuso, Joseph

Image analysis

Image transformation or preprocessing

Changing the image coordinates

348428, 348451, G06K 932

Patent

active

057547106

ABSTRACT:
An image resolution conversion method converting an image of a first resolution represented by multivalued digital data into an image of a second resolution by interpolation, comprises the steps of assigning a block defined by a plurality of pre-conversion pixels of the first resolution image to each post-conversion pixel, performing edge detection in the block based on data for each pixel of the block, and performing resolution conversion by a first interpolation method when at least the result of the edge detection satisfies predetermined conditions, and performing resolution conversion by a second interpolation method when the result of the edge detection does not satisfy the predetermined conditions.

REFERENCES:
patent: 4381547 (1983-04-01), Ejiri
patent: 4484347 (1984-11-01), Kashioka
patent: 4736439 (1988-04-01), May
patent: 5487115 (1996-01-01), Surka
patent: 5491759 (1996-02-01), Nagao et al.
patent: 5511137 (1996-04-01), Okada

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