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Erschienen in:
2016 | OriginalPaper | Buchkapitel
3. Assessing Quality of Viewing Cabinets for Visual Inspection
verfasst von : Yang Yang, Ming Ronnier Luo
Erschienen in: Advanced Graphic Communications, Packaging Technology and Materials
Verlag: Springer Singapore
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Abstract
Viewing cabinets provide standard lighting conditions for visual inspection in the color-related industries such as imaging, textiles, and graphic arts. The lighting conditions are typically defined by the correlated color temperature (CCT), distance of departure from the blackbody locus (Duv), color rendering index (CRI), and metamerism index (MI). Various technologies were used to simulate the standard lighting conditions such as fluorescent, tungsten, filtered tungsten, and tunable LED lamps. This paper investigates three cabinets based on different technologies. It showed that all the three cabinets could achieve very high CRI above 95 and small Duv within the tolerance 0.005. A 14-channel LED tunable viewing cabinet performed the most accurate CCT and the best are MIvis and MIuv among all the cabinets tested. Furthermore, it can predict well with lighting parameters across a large range of CCTs.