When part of the image is unsharp as a stylistic effect, or the emulation of "realistic" effects, such as looking through certain materials, in-image [[photo (medium)|photographs]] that are blurry, etc.

h4. Do not confuse

* [[depth_of_field]], which is a realistic effect of lenses related to focus.
* [[motion_blur]], which is a realistic effect of shutters and similar created by fast movement of an object.
* bad quality [[scan|scans]], [[photo (medium)|photographs]], etc. (which should generally not be uploaded)
** heavily denoised scans.
ぼかし ぼやけた 模糊