EVALUATION METHOD OF HYGIENE THIN PAPER AND HYGIENE THIN PAPER

摘要

PROBLEM TO BE SOLVED: To provide an evaluation method of a hygiene thin paper capable of easily managing a quality of the hygiene thin paper.;SOLUTION: An evaluation method of a hygiene thin paper formed with a sheet 100 having a crepe includes: an imaging step of acquiring an original image of the sheet by imaging the sheet by an optical system 22 shallow in the depth of focus; a processing step of performing an image processing for partitioning the original image into a first image whose luminance of the original image is equal to or less than the predetermined threshold value and a second image exceeding the predetermined threshold value; and a calculation step of calculating an area ratio of the first image or the area ratio of the second image to the original image.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT