Offset drift correction method in color film inspection apparatu

Details Offset drift correction method in color film inspection apparatu Offset drift correction method in color film inspection apparatu

1987-09-01

1989-01-31

Sikes, William L.

Boots, shoes, and leggings

364526, 36457107, 358 76, 358 80, 356408, 354426, G02B 100, G03F 310, G01N 2185, G03B 7091

Patent

active

048021075

ABSTRACT:
An offset drift correction method for use in in a color film inspection apparatus includes the steps of; measuring the changes of various amounts of light at intervals of a predetermined amount of light as density signals by using a green standardized logarithmic-transforming curve; providing table data by shifting the green standardized logarithmic-transforming curve as to inputs in such a way that the changes become equal to one another; writing the table data in a green look-up table; measuring input signals for red and blue at intervals of the predetermined amount of light; and substituting the measured inputs with the table data of the shifted green standardized logarithmic-transforming curve at corresponding amounts of light.

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