[Paper] Color Reproduction of Glass Dry Plate Scanned by a Linear Sensor Camera Using Filter Coefficient

Abstract

Area sensor-based imaging system is widely used in the digital archiving nowadays. This technique can accomplish the image acquisition work easily and efficiently. Such imaging system offers fairly uniform light distribution, relatively high resolution and relatively accurate color rendering 7) . However, if an area sensor-based imaging system and a linear sensor-based imaging system are compared under an identical imaging setup condition including the same theoretical imaging resolution, the light source, etc., it has some Abstract A method for color reproduction of old glass dry plates digitized by a linear sensor camera is proposed. A high-resolution scanner based on linear sensor camera was developed for digitizing glass plates, which is beneficial for high-quality color reproduction. The color reproduction uses filter coefficient calculated from color information of multiband filters. An approach for the calculation of filter coefficient used for color reproduction is addressed in detail. The method was applied to the digitization and color reproduction of a wall painting belonging to World Cultural Heritage Horyuji Kondo, Japan. A verification experiment is conducted to evaluate the accuracy of color reproduction results. Experimental results show that the proposed method is capable of high-quality color reproduction of image details, and there is merit to using this high-resolution digitization techniques for cultural heritage.