Rotation of digital images

Details Rotation of digital images Rotation of digital images

1984-07-30

1987-01-13

Ciarlante, Anthony V.

Image analysis

Histogram processing

For setting a threshold

340727, G06K 932

Patent

active

046370579

ABSTRACT:
The image is divided into regions of a given number of pixels. The original image is scaled down by a given factor. Each region of pixels is then enlarged in order to overlap its neighboring region. The enlarged regions are then sequentially written down in a scaled down version, in overlapped relationship, with each region oriented a given degree with respect to its neighboring region. The end result is a rotated image that has the same size as the original image with no gaps between neighboring oriented regions. This method applies to any arbitrary angle, as well as, to images defined as an arbitrary number of bits per pixel.

REFERENCES:
patent: 4000486 (1976-12-01), Schomburg
patent: 4271476 (1981-06-01), Lotspiech
IBM Technical Disclosure Bulletin, vol. 17, No. 10, Mar. 1975.
IBM Technical Disclosure Bulletin, vol. 18, No. 8, Jan. 1976.

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