Brightnessadjusted

Brightnessadjusted refers to the state of an image, video frame, or display where pixel luminance has been modified from its original values to change perceived brightness. The term is used in image processing, photography workflows, and display pipelines to indicate that a brightness modification has been applied, either globally or locally.

Brightness adjustment is commonly achieved through several methods. Linear scaling multiplies each pixel value by a constant to brighten or darken the image, often followed by clipping to the allowable range. Gamma correction applies a nonlinear transform to adjust luminance in a perceptually uniform way, with gamma values below 1.0 brightening and above 1.0 darkening. Histogram-based methods, such as histogram stretching or equalization, aim to redistribute luminance values to use the available dynamic range more effectively. In high dynamic range (HDR) workflows, brightness adjustment may be part of tone mapping to fit HDR content into standard dynamic range displays.

Applications of brightnessadjusted content include improving visibility in low-light scenes, preparing footage for broadcast or web delivery, and normalizing images for computer vision preprocessing. It can also be used to compensate exposure differences between shots or to achieve a consistent look across a sequence.

Considerations when adjusting brightness include preserving color relationships, avoiding color clipping, and understanding the difference between linear and perceptual brightness. Adjustments in linear color spaces behave differently from those in gamma-corrected or perceptual spaces, which can impact perceived color fidelity and detail in shadows and highlights.

Related concepts include contrast adjustment, gamma correction, histogram equalization, and exposure compensation.