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diffraction spikes

光条 回折スパイク

Diffraction spikes manifest as multiple spikes radiating from a point of light, similar to a lens flare which manifests as overall haziness and artifacts in the image.

Sparkle, glint, and diffraction spikes all refer to similar patterns of bright lines radiating from a point. They are not clearly differentiated, and usage tends to be context-sensitive. In general:

  • Sparkle is considered the base case. Usually four lines at right angles radiating from a point. Associated with eyes, liquid or particulate matter (e.g. raindrops, snow, sand), or nothing (appearing mid-air). Can appear in large numbers.
  • Glint is associated with solid objects, especially ones which are metallic and/or sharp. Usually appear singly or in small numbers.
  • Diffraction spikes is the technical term for the phenomenon in general, but is used less often. Can be used for more realistic-looking effects or conversely when appearing extremely large and exaggerated. More likely than sparkle and glint to be asymmetric or to have more than four radiating lines.

See also

  • lens flare
  • bokeh
  • light particles
  • Tag group:Image Composition

External Links

  • Wikipedia: Diffraction Spikes

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