Method and apparatus for image magnification correction

Details Method and apparatus for image magnification correction Method and apparatus for image magnification correction

1996-01-24

1999-12-21

Jankus, Almis R.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G06T 300

Patent

active

060055871

ABSTRACT:
An image processing apparatus has an adjusting mode which enables determination of a magnification correction value. A predetermined image on a test chart placed on an original table or an image of a chart fixed outside the valid image area are read, and the proper correction value for compensating for any variation in the image magnitude within a scanning system is computed based on the results of reading the test chart image. Subsequently, a printing system is operated to print test chart data read from a memory and the image printed in accordance with the test chart data is read by the scanner system which has been corrected, the result of the reading being used in computing the magnification correction value for compensating for any magnification variation occurring in the printer system.

REFERENCES:
patent: 4951158 (1990-08-01), Ichitani
patent: 4961090 (1990-10-01), Gray, Jr. et al.
patent: 5130525 (1992-07-01), Ryon

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