vervaging

Vervaging is a noun derived from the Dutch verb vervagen, meaning to blur or fade. In English-language discussions, the term is sometimes used to describe the process or result of reduced sharpness in an image or perceptual scene. It is commonly discussed in photography, film, and digital imaging contexts.

Vervaging occurs when light from a point is spread over a distribution rather than concentrated, due to optical defocus, motion, or atmospheric effects; sensor limitations; or post-processing choices. It can be intentional (soft focus) or unintentional, and may affect edges, texture, and color transitions.

Quantitatively, blur is described by the point spread function and metrics such as blur radius or full width at half maximum; perceptually, it reduces edge contrast and detail. Techniques to manage vervaging include capturing with proper focus, using appropriate shutter speeds and apertures, stabilizing the camera, and improving lighting. In post-production, sharpening or deconvolution, selective masking, and diffusion effects may be used to counter or embrace the blur.

In art and media, vervaging can convey motion, distance, or dream-like mood. In forensic or scientific imaging, excessive vervaging can hinder interpretation, while controlled blur may aid depth cues or aesthetic purposes. Understanding its causes helps photographers and editors balance sharpness and atmosphere.

See also blur, defocus, smoothing, and deblurring.