繪畫可能受到強光曝曬、灰塵和溫濕度等環境因素造成褪色。由於色彩是由光源和物體反射率所決定，使用多頻譜照明系統可以將偏色的繪畫復原到某個程度。如何決定LED燈源的輸入訊號，是影響色彩復原準確度的關鍵。iccMAX是個強大和多用途的色彩管理工具，它不單能讓不同的色彩媒體在D50光源下對色，還支援多頻譜與材料外貌的資料儲存與複製，並提供多元處理功能。iccMAX的多頻譜與多元處理功能，適用於本研究多頻譜相機與多頻譜燈源的色彩描述與校正。本研究首先探討濾鏡式多頻譜相機校正，以求取物體反射率的方法，利用階調線性化校正、優化的色彩混合矩陣運算，在iccMAX的架構下，獲得準確的反射率。接著研究多頻譜LED燈源複製輻射頻譜的方法：先利用逆向模式獲得燈源訊號的粗調值，再進一步最小二乘曲線擬合法方式獲得更準確的細調值。本研究最終使用一個8通道多頻譜相機獲得繪畫頻譜反射率。並使用一個有16通道的多頻譜LED燈源調變光源頻譜，透過iccMAX，使偏色的畫作更接近原作的色彩。

The colors of a painting would discolor by a variety of environmental factors including light, dust and humidity. Using a multispectral lighting system can recover the faded colors to some degree. Since color appearance is determined by the spectral power distribution of the light source and the spectral reflectance of the object, how to determine input signals of the LED lamps is the key point. iccMAX is a powerful and more versatile tool for color management, which allows for consistent color reproduction across various devices with different native color spaces. It goes beyond D50 colorimetry, supports to store multispectral and martial appearance data, and provides multi-element processes to calculate the multi-dimensional data. The painting can be captured as a multispectral image by a multispectral camera using iccMAX framework. In this study, a filter-based multispectral camera was characterized first with iccMAX. It applies tone linearization with an optimal color-mixing matrix. On the other hand, the tunable multispectral LED systems also can be characterized to match a given spectral power by applying a rough estimation of the LED signals and then fine-tuning the signals by a Least squares curve fitting approach. A 16-channel LED was used to minimize the color differences between the original and the discolor reproduction.

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