Evaluating apparatus for surface condition of copper foil, program for evaluating surface condition of copper foil, computer readable recording medium having the same, and method for evaluating surface condition of copper foil

摘要

PROBLEM TO BE SOLVED: To efficiently and accurately evaluate visibility of a transparent base material.SOLUTION: A visibility evaluation device 10 comprises: photographing means 11 that photographs a mark 16 existing beneath a transparent base material 17 over the transparent base material 17; observation point-brightness graph preparation means that measures brightness for each observation point along a direction orthogonal to an extension direction of the observed mark 16 for an image captured by photographing, and prepares an observation point-brightness graph; and visibility evaluation means that evaluates visibility of a transparent base material 15 by a brightness curve produced from an end part of the mark 16 over to a part thereof where the mark 16 does not exist in the observation point-brightness graph. The visibility evaluation means evaluates the visibility, using a difference B(B=Bt-Bb) between a top average value Bt of the brightness curve produced from the end part of the mark to the part thereof where the mark does not exist and a bottom average value Bb thereof.