Is A Camera With 10 Stops Of Dynamic Range HDR?

Standards for HDR have been established by various industry organizations for displays but as yet, no similar initiative has been undertaken in the camera industry, though manufacturers almost without exception make exaggerated claims for the dynamic range of their cameras. It is said that photochemical film is capable of 13+ stops, though this varies greatly... Continue Reading →

Michael Zink

You might well wonder how one mortal could possibly wear so many hats, but Michael Zink is Vice President, Emerging Technologies at WarnerMedia, President & Chairman @ UHD Alliance, Education Vice President @ SMPTE, and Co-Chair, UHDTV Committee, Motion Imaging Technology Council (MITC) of the American Society of Cinematographers. In other words, he's someone worth... Continue Reading →

Are 8 Bits Insufficient for HDR Test Patterns?

When Portrait Displays acquired Patterns, they announced: “Patterns™ by Portrait Displays is the first and only macOS test pattern generator to support High Dynamic Range (HDR) on the market. The application uses the latest Metal APIs to support both SDR and HDR color spaces, including (but not limited to) sRGB, BT.709, Adobe RGB (1998), DCI-P3,... Continue Reading →

HDR Test Video

We just compared the 16" MacBook Pro (2021) to the LG CX with this test video by Florian Friedrich and it was quite an eye-opener! The difference in color volume is similar to comparing Samsung's QLED to the LG C1 OLED in the header picture and the one below (Sony BVM-HX310 mastering monitor, center). Why... Continue Reading →

Gamut Rings

Although a chromaticity diagram is useful for 2D representations, the color gamut of a display actually needs to be evaluated using a 3D color space that includes the lightness axis. Gamut rings representing a 3D color gamut solid using a 2D diagram are a solution to this problem and have been adopted as an international... Continue Reading →

HDR Luminance Levels: Why The Critics Are All Wrong

Discussions surrounding the brightness levels of HDR often talk about brightness as if there were some fixed, immutable number beyond which the picture becomes unwatchable (for many, that number is 48 nits!), whereas studies conducted by Dolby and the DCI both showed conclusively that viewers overwhelmingly prefer brighter picture levels than are currently available in... Continue Reading →

Reference White Is A Myth

One of the most popular posts on our blog is about HDR reference white, which has been standardized as 203 nits. But in reality, there is no such thing as reference white, any more than there is a fixed value for 18% gray or fair skin. Diffuse white can be 145 nits indoors or as... Continue Reading →

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