多光譜攝影圖像調(diào)查技術(shù),基于不同物質(zhì)對(duì)不同光譜吸收與反射的差異及不同波段單色光譜有相應(yīng)的灰度偏向,以單色光譜灰度圖像經(jīng)偽彩色強(qiáng)化,可作為一種繪畫材料普查方法。這種方法的應(yīng)用首先需要建立相關(guān)遺址繪畫材料多光譜圖像標(biāo)準(zhǔn),以此為基礎(chǔ)才可以通過多光譜偽彩色等圖像對(duì)壁畫中漫漶壁畫、相近色相顏料及無法觀察的有機(jī)材料做前期普查,為后期高精度儀器的進(jìn)一步調(diào)查提供參考。采用已知敦煌壁畫中常用29種繪畫材料制作標(biāo)準(zhǔn)顏料色板,通過規(guī)范多光譜拍攝程序和優(yōu)化多光譜拍攝條件,在250～1 300nm之間獲取各種顏料在不同光譜區(qū)域的反射及熒光圖像,再經(jīng)過后期科學(xué)的圖像校正及紅外、紫外反射偽彩色圖像合成,初步建立敦煌壁畫顏料多光譜圖像標(biāo)準(zhǔn)數(shù)據(jù)庫。對(duì)真實(shí)壁畫進(jìn)行多光譜拍攝,將獲取的可見反射、紅外反射偽彩色和紫外反射偽彩色圖像與標(biāo)準(zhǔn)數(shù)據(jù)庫圖像進(jìn)行交叉對(duì)比,并采用便攜式顯微鏡、便攜式X熒光、近紅外光譜等分析技術(shù)驗(yàn)證所獲取的多光譜分析結(jié)果,表明壁畫顏料多光譜圖像標(biāo)準(zhǔn)數(shù)據(jù)庫的建立,作為一種新型無損檢測(cè)輔助方法,可通過多光譜圖像對(duì)敦煌壁畫顏料前期鑒別、推斷繪畫材料屬性以及獲取顏料分布狀況等信息。繪畫材料光譜圖像數(shù)據(jù)庫的建立可提高...

【文章頁數(shù)】：18 頁

【文章目錄】：
Introduction
1 Experimental samples of painting materi-als
2 Acquisition of Multispectral Images
3 Multispectral image calibration and estab-lishment of image atlas
    3.1 Multispectral image calibration
    3.2 Construction of a multispectral image atlas
4 Field test of multispectral image standards for painting materials
    4.1 Tests performed on the“King Sivi Jataka trading his fleshfor a dove”mural
        4.1.2 Pigment distribution in Detection Area No.2and the identification and verification of mixed pigments
        4.1.3 Identification and Verification of Pigments and Or-ganic Dyes in Detection Area No.3
5 Discussion
6 Conclusions



本文編號(hào)：4034032