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Blur is a visual phenomenon in which the contours and details of objects in an image or field of view appear indistinct and less sharp. It manifests as smooth, fuzzy boundaries between elements of a scene that may partially or completely lose their original shape and structure.

In nature and technology, blur occurs in various situations and contexts. For example, it can be the result of object or camera movement, where moving elements appear with a smearing effect. Blur also arises from insufficient focus in optical devices, when the focal distance does not align with the object's position. It may appear when observing through different media such as fog, smoke, or water vapor, which scatter and weaken light rays.

Blur can encompass a wide range of objects and scenes: from natural phenomena like flowing water or wind, to human activities and urban environments where the movement of vehicles, pedestrians, or technical equipment can create similar effects. It is also present in macro photography, where shallow depth of field isolates certain image zones by laterally or frontally blurring the surrounding space.

Physically, blur is associated with diffraction, scattering, imperfections of optical systems, atmospheric conditions, as well as dynamic parameters of shooting and observation. As a result, it affects how the shape, texture, and spatial structure of objects are perceived, creating soft transitions and reducing detail.

Thus, blur is an important and common phenomenon in visual perception and imaging, reflecting various observation conditions, movement, and optical characteristics of the environment. It encompasses many physical and technical aspects that influence the clarity and distinctness of the representation of objects and scenes in nature and human activity.

Blur

Woman in Green at a Cafe with Blurred Motion