10 April 1995 High-resolution movie-film digitization: color scanner calibration
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Abstract
This paper introduced a novel system concept for high color/spatial resolution movie film electronic capture. The camera system scans each frame of movie film to the full spatial/spectral resolution of the film. The image detector output is digitized to a unique color space that involves the dye density of each of the film's three color layers (discussed in a different paper at this conference). This paper briefly discusses the system concept. A side topic of this paper is to present the camera color calibration methodology that ensures accurate color capture and storage. From the spectrophotometer output of the scanned image, the XYZ values of each color sample can be calculated. The traditional method applies a global transformation matrix to translate the scanned RGB values into the XYZ space. In its simplest form the transformation matrix is a 3 X 3 matrix translating RGB into XYZ. Other approaches have considered various linear combinations of RGB (e.g. R*G, R2) with some success. Our approach is to consider local regions of RGB color space and determine the transformation matrix based only on those local RGB and measured XYZ values.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bruce B. Glasgow, Thomas P. McElwain, Lon N. Pringle, "High-resolution movie-film digitization: color scanner calibration", Proc. SPIE 2414, Device-Independent Color Imaging II, (10 April 1995); doi: 10.1117/12.206537; https://doi.org/10.1117/12.206537
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