New Brightness Metric

To the best of our knowledge, Paolo Centofanti at DDay.it is the only TV reviewer measuring color volume using Kenichiro Masaoka’s gamut rings and now TFT Central’s Simon Baker deserves a big round of applause for adopting XCR to measure perceived brightness in his monitor reviews. It’s well worth your time to read the entire article.

“One very good approach was a new H-K brightness model that was developed at RIT’s Munsell Color Science Lab with funding by Samsung Display (the panel manufacturer as opposed to Samsung Electronics the display manufacturer). Applying the H-K effect model to the perception of brightness in displays is referred to by Samsung Display as ‘eXperienced Color Range’, shortened to ‘XCR’.”

“XCR is based upon a mathematical model of human visual performance obtained from psychovisual experiments. This approach can meet the requirements we outlined above, and importantly accounts for the influence of colour along with luminance.”

“XCR is a complex calculation which takes data for luminance and colour gamut and provides a metric that accounts for both in order to predict the perceived brightness. It was derived from psychophysical direct brightness matching experiments and performs well on several recent data sets and studies of display brightness. It’s been adopted recently as the global standard by the Semiconductor Equipment and Materials Institute (SEMI). They are an industry organization in which over 2,500 semiconductor and display companies from around the world participate. SEMI officially adopted the method of XCR as an international standard on Q3 2023.”