Raw파일의 노출 조절에 따른 컨버팅 프로그램들의 이미지 재현적 특성에 관한 비교 연구

Abstract

This study, which deals with the reproductive features determined by exposure controls withinthe range of 4 bit (as common difference) of raw files in the digital pictures, conducts acomparison and analysis for each converting program to understand the fundamental features ofraw files and suggest a fundamental theory for reproducing images that can satisfy the intensionof photographers. For present research, Kodak step tablet No.2, Macbeth Color Checker andFotowand gray card, using Nikon D2X, are photographed as standard subject. The raw files arerespectively converted using Capture NX, Capture One Pro, Photoshop CS2. Then changes intone image, as well as the image productivity for color reproduction, clarity, noise density, anddynamic range are analyzed using Photoshop CS2 and Imatest-1.6.16. The result of analysisindicates that, even within ±2stop range, which is known as control range with no raw file loss,reproduction appeared different depending on exposure and converting program, which meansthat no standard feature can be determined. Nevertheless, through analyzing the features andcapabilities of the raw files and converting programs, this study presents a framework forselecting exposure, converting program, and methods, which are appropriate for reproducingintended images.