A radiometric reference point used to calibrate or define the maximum luminance value of interest in a scene or object.…

In video technology, that point on the chromaticity diagram having the tristimulus of a source appearing white under the viewing conditions; i.e., a spectrally nonselective sample under the illumination of viewing conditions. [After SMPTE]

A movable reference point that defines the lightest area in an image, causing all other areas to be adjusted accordingly.

The lightest tone in an image.

The brightest area of an image that is mapped to the highest level available (pure white) based on the bit-depth of the image (Level 255 for an 8-bit image) when setting the dynamic range during a lev [..]

The lightest tone printable in an image. All tone values above this threshold will print as white. Wide Angle Lens:

The colour that when scanned produces values of 255, 255, 255 in an 8-bit scanner. Ideally the white point is 100% neutral reflectance or transmittance. See also Reflectance.

The chromaticity of a light source, often described by refering to its chromaticity coordinates or the colour temperature of the light source.

 One of a handful of reference illuminants used to define the color “white”. Based on the application, different definitions of white are needed to give sufficient results.