Definition of "vignetting" []

• Present participle of vignette. (verb)

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• "The word vignetting is used to indicate an unintended darkening of the image corners in a photographic image."
• "These stacked layers of metal can also lead to undesirable effects such as vignetting, pixel crosstalk, light scattering, and diffraction."
• "The most basic features offered by the software include cropping, rotating and flipping; ways to alter color exposure, saturation, tin, white and black; filters that apply sketching or soft focus; as well as effects such as vignetting, borders white glow and so on."