Method and apparatus for correcting extension rates of images

Details Method and apparatus for correcting extension rates of images Method and apparatus for correcting extension rates of images

1989-10-10

1991-04-16

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

384 44, 384 46, 384 47, 378162, 378163, G06K 900, G06K 932, H05G 128

Patent

active

050089471

ABSTRACT:
Positions of marker images included in two images obtained by a digital radiography system are detected by a marker position detecting section. The marker image intervals in each image are calculated by an extension rate correcting section in accordance with the detected positions of the marker images. Reduction/extension for one image is perfomed in accordance with the extension rate of the image obtained by a ratio of the calculated marker image intervals, thereby coinciding extension rates of two images.

REFERENCES:
patent: 4564861 (1986-01-01), Hishinuma
patent: 4710875 (1987-12-01), Nakajima
patent: 4850028 (1989-06-01), Kawamura

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