Overview of Distortions and Inconveniences
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The Two Main Causes of Perspective Distortions
Shape Discrepancy: Spherical vs Planar Surface of ProjectionIn the real world, objects from the environment surrounding us are mapped on our retina, inside the eye, to produce human vision. Yet the shape of the retina is sphere, which is a 3d element. Whereas objects in the virtual worlds are mapped on 2d planes of projection.…
The Notion of Visual Whiplash
An individual still rendering of a 3D virtual scene is flawed by one or several types of distortion, that skew the perception of space conveyed by the rendering. What is more, movies, videos and computer graphics animations are made up of a quick succession of still images also designated as frames. Frame rate, expressed in…
Perceptual Distortions in Animations
In addition to the six symptoms of distortion shown in Analysis, further symptoms appear particularly on animations, either videos or interactive ones such as gaming. Worse still real sickness, called Virtually Induced Motions Sickness, can be caused or worsened by perspective distortions.Exaggerated Amplification of MovementsIs a very misleading aberration and constitutes the bulk of distortions…
Analysis of Distortions
Below: characterization of six individual distortion symptoms, that can be found on a single rendering. Note that further inconveniences are specific to animations.Deformation of ObjectsAcute AnglesstereographicperspectivestereographicperspectiveRendering a set of spheres. FOV 140°. (a) The spheres keep their original shape. (b) The spheres are badly distorted on the edges. The disproportion shows clearly when comparing l1…
REPLICATING HUMAN VISION
How Good Do 3D Graphics Replicate The Human Vision?3D computer generated images constitute a diversified and strongly booming industry. Their market potential is far not exhausted. The ability of Emulating the real world as faithfully as possible has emerged as the most decisive criteria in the fierce battle among competitors. Hence the concept of Realism…
