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Apparent minification in an imaging display under reduced viewing conditions
1Centre for Behavioural Research in Cancer, Anti-Cancer Council of Victoria, Carlton South, Australia.
Perception
|January 1, 1993
Summary
Viewing magnified scenes through camera viewfinders causes apparent minification, making objects seem smaller and farther away. This visual illusion occurs even without familiar distance cues, impacting size constancy.
Area of Science:
- Visual Perception
- Optics
- Psychology
Background:
- Magnified imaging in displays can alter perceived scene geometry.
- Previous observations noted apparent minification in outdoor viewfinder displays.
Purpose of the Study:
- To investigate apparent size minification in SLR camera viewfinders indoors.
- To determine the robustness of this effect under varying light conditions and cue availability.
Main Methods:
- Four experiments presented planar objects at 3-9m distances in SLR camera viewfinders.
- Conditions included good light, darkness, and manipulated luminance relationships.
- A fifth experiment examined the role of size constancy cues.
Main Results:
- Consistent apparent minification of object size was observed in the viewfinder.
- The effect persisted in darkness and when familiar size/distance cues were absent.
- Reduced visual size constancy was implicated as the underlying mechanism.
Conclusions:
- Apparent minification in camera viewfinders is a robust phenomenon.
- It results from diminished visual size constancy due to the elimination of distance and size cues.
- This has implications for understanding visual perception in mediated viewing environments.