- For the Essence model, go to the Apple or Google store and download Spectrum Genius Essence.
SGT SPECTRUM GENIUS TRANSMITTANCE $9.95
Working with filters, gels, lenses, diffusers, window treatments and the like can be a haphazard business. From experience, many in the industry have a good gut feel as to what to choose. Now we have the tool and technique to make the choice more scientific.
Indoor horticulture is a rapidly growing industry in the United States and elsewhere. With Lighting Passport and Spectrum Genius Agricultural Lighting, any light source, not only LEDs, can be measured and evaluated! Many characteristics of light play their part in stimulating plant growth. |
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We are excited to announce the release of Spectrum Genius Studio [SGS], the App which works together with the Lighting Passport [LP] spectrometer to determine the color properties of lighting for the TV/Broadcast and movie industries. SGS is based on the Television Lighting Consistency Index [TLCI] which through EBU Tech 3353 is the UK and European standard. The US has not adopted a standard yet but is tending toward TLCI.
TLCI categorises studio luminaires into five levels
TLCI uses a Color Checker (Split MacBeth) chart [1] to compare the color rendering qualities of a measured luminaire to a benchmark based on Correlated Color Temperature [CCT] and assigns it a number between 0 and 100 [2] describing its color quality with 100 being perfect. The CCT is then listed [3]. The assigned number falls within the 5 categories above from excellent to poor. TLCI incorporates a number indicating deviation from the Black Body Curve (Planckian Locus) [4]. It also indicates camera corrections in Lightness, Chroma and Hue in 12 color categories to better align luminaires to cameras [5]. A graphic of the Spectral Power Distribution and the TLCI reference spectrum [6] gives an indication of the radiated light as opposed to the reflected measure shown in the Color Checker chart.
Additional references can be manually selected and users can add their own Television Luminaire Matching Factors [TLMF] for optimal balancing where more than one light source is used. To Quote Mike Wood: "If TLCI is a tool for manufacturers to use in designing a product for television use, then TLMF is a tool for practitioners that allows the prediction of real world mixing and matching of different sources before getting in the studio, when it is often too late to change."
SGS produces all these charts and numbers at the push of a button. In addition, beneath each color patch in the Color Checker, it lists a TLCI number [7] so lighting practitioners can evaluate luminaire performance for the entire color palette. This is extremely useful with less sensitive or poorly calibrated monitors.
SGS is the only currently available mobile App which comprehensively covers all aspects of TLCI as opposed to just calculating a single TLCI number. We expect that the combination of LP and SGS will create a scientifically accurate and extremely simple approach for matching cameras to light sources for both manufacturers of studio lighting and DPs, lighting designers, and all other lighting professionals involved in color quality in TV/Broadcast and movie production.
SGS is currently only available for iPad or iPad mini.
For those of you who already own a Lighting Passport spectrometer, please go to the Apple Store, search for Spectrum Genius Studio in the iPad section and download. If you have not yet purchased your LP, please place your orders through LEDmetric.
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