휘발⋅탈색된 문서의 디지털 복원
Digital Restoration of Volatilized⋅Faded Documents
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참고문헌
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초록
기록물의 디지털 복원은 휘발⋅탈색되어 가독성이 떨어지는 기록의 내용을 이미지화해복원하는 방법이다. 휘발⋅탈색된 문서는 주로 특수한 용지이며 이는 사용 용도에 따라 제작방법이 각기 다르고 빛, 온⋅습도, 알칼리나 산성 물질 등과 반응하여 기록내용이 훼손된다. 국가기록원에서 추진한 1,206매의 특수용지에 대해 이미지비교감식기(VSC: Video SpectralComparator) 장비를 적용하여 디지털 복원한 데이터를 분석한 결과 감열지는 자외선 조건에서가독성이 향상되었다. 감광지는 디아조복사지로 적외선 형광 조건에서 기록내용이 선명해졌다. 다만 일부 끊어진 글자 등에는 효과가 없어 기록물이 제작되었을 때 최초 기록의 발현 상태가 불량하여 효과가 떨어지는 것으로 추측된다. 습식복사지의 경우 다양한 광원을 적용하였지만 효과가 미미하였다. 한편 박엽지 등 인피섬유가 섞인 1900년대 초 조선총독부 생산 문서에서는 자외선 조건에서 가장 선명해졌고, 감열지와 비교했을 때 가시광선+적외선 등 더욱 다양한 조건에서 가독성이 향상되었다. 앞서 살펴본 바와 같이 데이터의 수가 많지 않아 재질별적합한 광원 기준 판단은 어려우나 재질에 따라 반응하는 광원에 대한 경향성을 파악할 수있었다.
Abstract
Digital restoration of documents refers to the way for restoring images of records whoselegibility is poor due to volatilization⋅fading. The study analyzed the application of VSC(VideoSpectral Comparator) to 1,206 sheets of special paper by the National Archives of Korea and digitalrestoration data. The findings show that most of thermal paper especially the legibility was improvedunder the ultraviolet condition. Records of sensitive paper, or diazo copying paper, became clear underthe conditions of infrared fluorescence light. However, there was no effect for some missing lettersso it is regarded that the effects are limited when the initial state of a record is poor. there wasinsignificant effect for wet copying paper despite application of various light sources. On the otherhand, When compared with thermal paper, legibility of documents produced by the JapaneseGovernment-General of Korea in the early 1900s mixed with bast fibers such as tissue paper wasimproved under various conditions such as visible and infrared rays though it was most visible underthe ultraviolet condition. As mentioned above, few number of data makes it difficult to decide a lightsource adequate for material. However, it was possible to identify the tendency of light sources reactingto material.
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