Exposurechanging

Exposurechanging refers to the deliberate modification of an image's exposure—defined as the amount of light that reaches the sensor or film—either during capture or afterward. In photography and videography, exposurechanging aims to alter brightness, contrast, and detail across shadows and highlights; it can be used to correct underexposed or overexposed frames or to create artistic mood.

During shooting, photographers use exposure compensation or manual exposure settings to prevent clipping and to push tonal range in the desired direction. Bracketing captures multiple exposures for later combination. In post-processing, exposurechanging is accomplished with brightness, exposure, or gamma adjustments, along with highlight and shadow recovery; for HDR workflows, multiple differently exposed frames are merged.

In motion, exposurechanging can be animated through keyframed exposure in editing software, or achieved by calculating scene luminance to maintain consistency across a sequence. In computational photography, algorithms perform exposure fusion or tone mapping to balance exposure across scenes.

Applications span digital photography, film and video, surveillance, and scientific imaging. Potential drawbacks include noise amplification in dark regions, color shifts, and loss of detail in overly bright areas if exposure is pushed too far. Proper use requires understanding the interaction between ISO, shutter speed, and aperture, as well as the camera’s dynamic range.

Related concepts include exposure value, ISO sensitivity, bracketing, HDR, tone mapping, and highlight recovery.