Surface Intersection Visualization via Alpha-Blending
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Solution Overview
Problem
Existing techniques for visualizing surfaces intersecting volumes in computer-based renderings often fail to provide clear context on how the surface intersects interior volumetric structures, leading to difficulties in placing surfaces for clipping or modifying volume visualizations, especially with curved surfaces, and can obscure details due to obtrusive visualization methods.
Innovation Solution
A method that involves receiving input data for both the volume and the surface, determining points within the volume with a predetermined spatial relationship to the surface, assigning visual parameter data to these points, and computing a composite representation using alpha-blending to render the surface intersecting the volume, allowing for accurate visualization and clipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If existing techniques are used to visualize surfaces intersecting volumes, then the visualization process is simple, but the clarity of surface intersection context is poor
Solution Approach 1:
The method segments the volume into multiple discrete points and assigns visual parameters to each point based on its spatial relationship to the surface. This segmentation allows for precise control of visual characteristics at different locations, preserving context information about surface intersections while maintaining a manageable processing approach through point-by-point evaluation.
Solution Approach 2:
The patent applies local quality by assigning different visual parameters (such as opacity, color, or other visual characteristics) to different points in the volume based on their specific spatial relationship to the intersecting surface. Points closer to the surface receive different visual treatment than points farther away, creating a visualization that locally adapts to highlight surface intersection context without requiring complex global modifications.
2Loss of information
If obtrusive visualization methods are used for surfaces, then the surface is clearly visible, but volumetric details are obscured
Solution Approach 1:
The method employs parameter changes by dynamically adjusting visual parameters (such as opacity, color intensity, or other display characteristics) of volume points based on their distance or spatial relationship to the intersecting surface. This allows the surface to be visualized with sufficient prominence while simultaneously preserving volumetric details through controlled parameter modulation, avoiding the need for obtrusive visualization methods that would obscure internal structures.
3Measurement precision
If points far from the surface are included in the visualization, then the volume context is maintained, but the surface intersection clarity is reduced
Solution Approach 1:
The patent uses parameter changes to differentiate points based on their spatial relationship to the surface. By assigning visual parameters that vary with distance from the surface (such as decreasing opacity or changing color intensity for points farther away), the method maintains precision in depicting surface intersections while still incorporating the broader volume context through a gradient or threshold-based parameter assignment scheme.
Data Source
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AI summary
A method of generating a computer-based representation of a surface intersecting a volume comprises: receiving first input data representing the volume and receiving second input data representing a position of the surface with respect to the volume. The method comprises determining first visual parameter data relating to one or more visual characteristics of the volume and determining, based on the first and second input data, a set of points in the volume having a predetermined spatial relationship with the surface. For each of the points in the set of points, second visual parameter data relating to one or more visual characteristics of the respective point in the set of points is assigned. Using the first visual parameter data and the second visual parameter data, a composite representation of the volume and the surface is determined for use in rendering a visualization of the surface intersecting the volume.