Processing method for the rotation of an image

Details Processing method for the rotation of an image Processing method for the rotation of an image

1984-05-23

1986-10-21

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

340727, 364731, G06K 932

Patent

active

046189912

ABSTRACT:
A signal rotation processing method for transforming an original image expressed on two-dimensional orthogonal coordinates into an image rotated by an arbitrary angle of .theta. radians. In order to raise the transforming speed, the method includes a skew coordinate transformation step of multiplying the original coordinates of the image elements by a matrix of ##EQU1## and an enlarging/reducing transformation step of conducting multiplication by a matrix of ##EQU2## .

REFERENCES:
patent: 3811110 (1974-05-01), Inose et al.
patent: 4468688 (1984-08-01), Gabriel et al.

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