Institute of Electrical and Electronics Engineers (IEEE)
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SMPTE ST 2122:2020
Scope
This standard specifies the method for calculating the Spectral Similarity Index (SSI) and the notation for the index and its reference spectral distribution. SSI can be used to evaluate how similarly one can expect two light sources to work with, or in place of, each other for motion-picture photography. It is also suitable for other lighting applications.
SMPTE ST 2122:2020 history
2020SMPTE ST 2122:2020 ST 2122:2020 - SMPTE Standard - Spectral Similarity Index (SSI)