Color Management of Four-Primary Digital Light Processing Projectors
Abstract:Traditionally, hardware for additive color displays, including projection devices, has been built from a set of only three primaries: a red, a green, and a blue. Recently, some manufacturers of projector displays have designed their hardware to project a fourth primary, a white. This fourth primary has been helpful in increasing the luminous output possible from these displays. Because interdevice color communication infrastructure is based on red, green, and blue channels (RGB), the four-primary devices accept RGB digits and internally convert to red, green, blue, and white channels (RGBW). From a color management viewpoint, the four-color projectors look like RGB devices, but the typical color characterization models fail owing to the complexity introduced by the hidden RGB to RGBW conversion. Several four-primary digital light processing projectors were investigated and a new characterization model is proposed that approximately accounts for the relationship between RGB digital counts and resultant projected colorimetry.
Document Type: Research Article
Affiliations: Munsell Color Science Laboratory, Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, New York 14623
Publication date: 2006-01-01
The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.
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