Stereoscopic Shading Adjustment for 3D Rendering
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Solution Overview
Problem
Ray tracing over curved surfaces in 3-D graphics can cause undesirable vertical displacement, leading to discomfort such as dizziness and headache in viewers due to excessive parallax differences between left and right eye images.
Innovation Solution
Adjusting the shading of pixels in stereoscopic rendering to emphasize horizontal displacement while substantially reducing vertical displacement, thereby blending both horizontal and vertical displacements to create a more comfortable viewing experience without negating refractive and reflective effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ray tracing is used to render 3-D scenes with complex light interactions, then refractive and reflective effects are accurately depicted, but vertical displacement occurs causing viewer discomfort
Solution Approach 1:
The patent applies different shading adjustments to different regions of the image based on their specific displacement characteristics. Horizontal displacement is enhanced in certain areas while vertical displacement is suppressed in others, allowing the system to preserve accurate light interactions where needed while eliminating discomfort in specific regions.
Solution Approach 2:
The patent modifies shading parameters specifically for horizontal and vertical directions independently. By changing the shading parameters to emphasize horizontal displacement and reduce vertical displacement, the system maintains the accuracy of light interactions while reducing the harmful vertical displacement effects that cause viewer discomfort.
2Measurement precision
If horizontal and vertical displacements are equally emphasized in stereoscopic rendering, then accurate depth perception is achieved, but viewer comfort is reduced due to excessive parallax differences
Solution Approach 1:
The patent introduces asymmetric treatment of horizontal and vertical displacement components. Instead of treating both directions equally, the system applies asymmetric shading adjustments that enhance horizontal displacement for depth perception while suppressing vertical displacement to reduce excessive parallax differences and improve viewer comfort.
Solution Approach 2:
The patent changes the displacement parameters independently for horizontal and vertical directions. By adjusting horizontal displacement parameters to maintain depth perception accuracy while reducing vertical displacement parameters to minimize parallax differences, the system achieves both accurate depth perception and viewer comfort.
3Object-affected harmful factors
If vertical displacement is reduced in stereoscopic images, then viewer comfort is improved, but the stereoscopic effect may be weakened
Solution Approach 1:
The patent preserves the stereoscopic effect by maintaining horizontal displacement in specific regions while suppressing vertical displacement. This local differentiation ensures that the depth perception necessary for the stereoscopic effect remains intact, while the comfort-improving vertical displacement reduction is applied where appropriate.
Solution Approach 2:
The patent independently adjusts horizontal and vertical displacement parameters to achieve the desired balance. By maintaining horizontal displacement parameters that preserve the stereoscopic effect while reducing vertical displacement parameters that improve comfort, the system achieves both goals simultaneously.
Data Source
AI summary
Rendering a stereoscopic image of a 3-D environment, including: tracing a path of ray from a camera to a light source for every pixel in a view window; determining shading of all pixels in the view window; and adjusting the shading for all pixels to show horizontal displacement but substantially reduce vertical displacement in the stereoscopic image. Keywords include shading and horizontal displacement.