VoxAR:在光学视觉中对体积染对象的自适应可视化 - 通过增强现实
IEEE transactions on visualization and computer graphics
|December 14, 2023
概括
VoxAR 增强了光学透视头戴显示器 (OST-HMD) 上的增强现实 (AR) 可视化. 它优化了虚拟对象的放置,并调整颜色,以便在现实环境中更清晰地感知科学数据.
科学领域:
- 计算机科学 计算机科学
- 人与计算机的交互
- 科学可视化科学可视化
背景情况:
- 增强现实 (AR) 提供了将数字科学数据整合到物理世界中的潜力.
- 光学透视头戴显示器 (OST-HMD) 面临的挑战是虚拟对象像素干扰现实世界颜色,妨碍准确的感知.
- 在OST-HMD中对体积染数据的有效可视化需要解决可见性问题.
研究的目的:
- 开发一种方法,VoxAR,用于在OST-HMD中有效可视化体积染对象.
- 为了克服虚拟对象像素干扰与现实世界的颜色在OST-HMDs的局限性.
- 提高对增强虚拟信息的准确感知.
主要方法:
- 一个两步的方法: 1) 基于空间和环境目标的放置体积染对象在现实世界的场景使用GPU遮光器语言实时性能.
- 2) 根据放置区域调整转移函数 (TF) 颜色,以确保像素可辨别性并保持感知数据映射.
- 对于TF颜色调整的新型优化方法.
主要成果:
- VoxAR成功地确定了实时的最佳物体位置.
- 该方法调整TF颜色,以提高体积染对象与现实世界背景的可见性.
- 用户研究和客观评估证明了该方法的有效性.
结论:
- VoxAR提供了一种有效的解决方案,用于在OST-HMD中可视化体积染数据.
- 该方法通过解决色彩干扰来增强科学信息的感知.
- 通过改进的AR可视化,VoxAR有助于更好地解释科学数据.
相关概念视频
01:17Accelerating Fluids
When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
01:18Fluid Movement Between Compartments
The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
01:15Depth Perception and Spatial Vision
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
01:23Plane Potential Flows
Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform Flow
Uniform flow...
Uniform Flow
Uniform flow...
01:27Laminar Flow
Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
01:27Uniform Depth Channel Flow
Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...