Live view · research preview

Move the knee and watch

Here the mapping from data to light runs on your graphics card, for every pixel, on every frame. Change the knee, the stretch or the headroom and the picture follows at once. On an HDR screen the values above the knee are brighter than white; on any other screen they are white.

This is the profile's reference shader, the same one that is tested against the project's test vectors. The data on this page is synthetic, made in your browser. You can also open an array of your own; it stays on your computer.

Move over the image for its values.

Loading… Drawn without interpolation: each screen pixel shows one data value. of its values lie above the knee. Frames drawn: 0.

Data Knee

Preset Headroom Colour map Stretch Range

Show the fair SDR plot: white above the knee

Or open your own array, a NumPy .npy file with two dimensions:

What this screen and browser are doing

Starting…

A page cannot measure a screen. To see whether yours really shows values above white, use the device checks, which have controls that must pass.

The mapping on screen now

These are the properties a file made from this view would declare (profile section 8). The live view writes no file; the Python and Julia tools do.