Narrowband three-primary displays cause observer-based metameric failure, whereby normal variations in color vision individuals to perceive display colors differently. This problem is reduced with broadband primaries, but so gamut. Another solution use six narrowband this considered impractical. Color error arises from the diversity of cone fundamentals among color-normal observers. We recently...

The ultimate goal of spectral imaging is to achieve high spectral accuracy, so that the spectral information can be used to calculate colorimetrically accurate images for any combination of illuminant and observer. A new spectral reconstruction method, called the matrix R method, was developed to reconstruct spectral reflectance factor accurately while simultaneously achieving high colorimetric...

Emerging electronic display technologies for cinema and television such as LED, OLED, laser and quantum dot are permitting greatly enhanced color gamuts via increasingly narrow-band primary emission spectra. A recent standard adopted for Ultra High Definition television, ITU-R Rec. 2020, promotes RGB primary chromaticities coincident with the spectral locus. As displays trend towards larger gam...

The discovery of either a dermatomal cutaneous nevus or a spinal arteriovenous malformation (AVM) should raise the suspicion of Cobb syndrome. The Cobb syndrome is a neurocutaneous syndrome in which there are metameric cutaneous and spinal AVMs. The authors present the case of a patient with acute cervical myelopathy and subtle cutaneous hemangiomas in whom a cervical perimedullary fistula was ...

The term “spinal arteriovenous metameric syndrome” (SAMS) is relatively new and is derived from craniofacial arteriovenous metameric syndrome (CAMS), which was introduced to designate a rare form of vascular malformation involving both brain and face. SAMS includes all spinal vascular malformations of nonhereditary genetic metameric origin, affecting not only the central nervous system (spinal ...