Concept / Afterimage

Afterimage

An effect in which color or form remains visible behind motion

An effect in which color or form remains visible behind motion.

A phrase to start with

Adds an afterimage behind a moving subject.

Appearance and effects

Offset traces are visible behind a moving form.

Visual traits

  • offset outline
  • translucent trace
  • motion direction

Expected changes

  • Traces are more likely to appear in the direction of motion

Five examples

1 — Medium-sized dog
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2 — Cat
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3 — Teenage boy
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4 — Unoccupied interior
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5 — Valley with a river and mountain ranges
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Meaning and scope

Definition

Afterimage is a temporal visual effect in which traces of color or form remain around a moving subject. It does not determine visual physiology, camera settings, or a particular moving object.

In more detail

Offset translucent traces indicate a direction of motion. It is distinct from blur, light trails, and double exposure.

Includes

  • Visual traces that remain behind moving forms

Excludes

  • Camera settings, actual visual physiology, light trails, or simple blur

What this does not imply

  • Camera settings, a particular moving object, light trails, or simple blur

Variability

Trace count and transparency can be adjusted separately.

Usage and adjustments

Usage

  • Use it as a trace of motion

Distinguish similar expressions

  • Specify light trails separately

Typical uses

  • Show temporal traces of a moving subject

Possible failure modes

  • The original form becomes unreadable

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