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디지털 영상을 이용한 수복재의 변색에 관한 연구
A COMPARATIVE STUDY ON THE COLOR MEASUREMENT AMONG SPECTROPHOTOMETER, DIGITAL IMAGE AND 35 MM IMAGE

대한치과기재학회지 1996년 23권 2호 p.271 ~ 281

이용근, 이건일, 차승훈,

소속 상세정보

이용근 (  ) - 원광대학교 치과대학
이건일 (  ) - 원광대학교 치과대학
차승훈 (  ) - 원광대학교 치과대학

KMID : 0362219960230020271

Abstract

The purpose of this study was to find correlations among the color differences measured by three methods. Those tuere 1)spectrophotometric method(Differential Colorimeter, Model TC-6FX, Denshoku, Japan), 2) digital image method - photographed b~, digital camera(KODAK Digital Camera 40, Kodak, USA) and processed by computer program(Adobe Photoshop 3.0), 3) 35 mm standard slide method took photographic color slide, read using scanner(Nikon 35 mm Film scanner, LS-3510 AF, Nikon, Japan) and processed by computer program(Adobe Photoshop 3.0). The color of resin modified glass ionomers were determined in vitro before and after thermocycling for 500 to 2,000 cycles. The values of CIELAB AE*, L*, a*, b*, r, g, b, r*, g*, b` were, analyzed to find correlations among them. From the experiment, the following results were obtained

1. There´ were no statistically` significant correlation among the values of CIELAB AE*, AC measured by digital camera and AC* measured by color slid,´ and scanner(Sig. F>0.05):
2. There was a statistically significant correlation between` the values of CIELAB L* and GR´ measured by digital camera(Sig. F = 0), and some pairs showed-significant correlation among CIELAB a*, b* value and r,, g, b value determined by digital `camera and r*, g*, b* value determined by. color slide and scanner.
3 The values of r, g, b determined by digital camera, and the values of r*, g`, b* value determined by color slide and scanner showed significant correlation between each corresponding values(Sig. F = 0). In this case, correlation coeffcient were 0.:x;9 -0.413.
4. In the same materials; the degree of color change was different depending on the shades, and of some shades showed of ´materials clearly different color change depending the measuring method.