Parallax Distortion

Parallax distortion occurs when one or more axis is out of square in taking a panoramic VR photo sequence or screenshot sequence intended to make a complete 360 degree view. When the line if sight is not perfectly aligned with the centre of the lens, or the viewing object is not dead level and straight, parallax distortions begin to build as the viewpoint is rotated. Items in the background begin to distort along one or multiple axis, relative to their positions in the previous shot. When the shots are combined, the distortion leads to artefacts as the two items cannot perfectly superimpose.

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Parallax Distortion

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Parallax Textures, Made with Camera Flash
A new method of creating parallax mapping has been demonstrated, which can automatically create parallax texturemaps from ordinary photographs.

3D Visual Processing Centre Identified
Detecting 3D is a trait of stereoscopy. Its why humans tend to have two eyes, two different viewpoints create a degree of parallax, and allow us to perceive in 3D. However, motion parallax and movement in all three dimensions is harder to discern than simple 3D structure.

A Closer Look At Parallax Occlusion Mapping
An in-depth Gamedev article, containing step by step coding advice for implementing parallax occlusion mapping to textures, such that the simulated heights can even self-occlude.

Parallax Augmented Desktop
The PAD is another attempt to move beyond the flatland desktop paradigm. This one, thought up by researchers in Masatoshi Ishikawa's lab at the University of Tokyo, turns the desktop into a virtual 3D space directly.

PET Resolution Increases by Leaps and Bounds
ET scans suffer quite a bit when they image moving tissue, such as a beating heart. No scan is instantaneous, and as the slices move down, the beating of the heart causes distortion that is hard to remove from the result, as pieces do not line up correctly. A solution to this, that increases the resolution as a side-effect, may have been found.

Fast Adaptive Optics for 3D Medical Imaging
One of the greatest problems with tomography based medical scanners, is what happens when the patient moves (breathes, or pumps blood). The distortion that occurs in each slice has long been correctable, but takes a long time to correct. With near-instant correction now possible, real-time medical scanning is starting to look like a true possibility.

Combating Noise and Distortion When Linking Aircraft to the wider Sensor Net
Commercial aircraft are a problem when it comes to linking them to the wider sensor net - all external electronic communication flows through a single part of the nose of the plane. This must be precision manufactured to be defect-free, or moisture and heat can tear the signal apart. How then, do you guarantee it is defect-free?

3-D Modeling Advance: A single photo can be reconstructed into a 3-D scene
Building on the premise of Parallax mapping, in which 3D displacement of surfaces is faked by means of displacing textures both by creating a height map of their protuberance from 3D space and then calculating the angle of that protuberance relative to the angle the observer is looking, Microsoft and Make3D have created a process allowing a single photo to become a 3D scene.

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(09/08/2008)
Traditional cameras and optical sensors have many shortcomings when compared to the organic eyeball. Artificial variants c...