parallax
Sign in to savethumb|upright=1.4|right|A simplified illustration of the parallax of an object against a distant background due to a perspective shift. When viewed from "Viewpoint A", the object appears to be in front of the blue square. When the viewpoint is changed to "Viewpoint B", the object appears to have moved in front of the red square. thumb|right|This animation is an example of parallax. As the viewpoint moves side to side, the objects in the distance appear to move more slowly than the objects close to the camera. In this case, the white cube in front appears to move faster than the green cube in t
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Parallax is the apparent shift in position of an object when viewed from two different locations—for example, an object might appear to be in front of a blue square from one viewpoint but in front of a red square from another. This effect matters because it helps us perceive depth and distance, since objects closer to us appear to move faster than distant objects as our viewpoint changes.
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Article
16 sectionsContents
- Visual perception
- Distance measurement
- Astronomy
- Metrology
- Photogrammetry
- Photography
- Weapon sights
- Optical sights
- Artillery-fire
- Art
- As a metaphor
- See also
- Notes
- References
- Bibliography
- External links
thumb|upright=1.4|right|A simplified illustration of the parallax of an object against a distant background due to a perspective shift. When viewed from "Viewpoint A", the object appears to be in front of the blue square. When the viewpoint is changed to "Viewpoint B", the object appears to have moved in front of the red square. thumb|right|This animation is an example of parallax. As the viewpoint moves side to side, the objects in the distance appear to move more slowly than the objects close to the camera. In this case, the white cube in front appears to move faster than the green cube in the middle of the far background.
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or half-angle of inclination between those two lines. Due to foreshortening, nearby objects show a larger parallax than farther objects, so parallax can be used to determine distances.