Method and system for the correction of image defects of a scann

Details Method and system for the correction of image defects of a scann Method and system for the correction of image defects of a scann

1989-09-12

1991-10-08

Smith, Jerry

Boots, shoes, and leggings

378 4, 36441314, 36441315, G06F 1500

Patent

active

050560204

ABSTRACT:
Disclosed is a method for the correction, in a scanner, of the defects due to the movements of the scanner. The method consists in having a rod which introduces a major attenuation and causing the scanner to make a full turn around a center of rotation O and obtaining m distinct views of the rod, each corresponding to an angular position .alpha..sub.j. The analysis of the signals of each view enables determining the angle .beta..sub.j of the rod. The knowledge of this angle .beta..sub.j leads to the computation of the coordinates b and c of the rod and the theoretical value .beta..sub.th of the angle .beta. for each view. The difference between the theoretical value .beta..sub.th and the measured value .beta..sub.j is used in the device for processing the scanner image.

REFERENCES:
patent: 4068306 (1978-11-01), Chen et al.
patent: 4135096 (1979-01-01), Giordano
patent: 4144569 (1979-03-01), Wagner
patent: 4217641 (1980-08-01), Naparstek
patent: 4272820 (1981-06-01), Lux

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