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相关概念视频

Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

185
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
185
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

168
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
168
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

486
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
486
Deformation of a Beam under Transverse Loading01:15

Deformation of a Beam under Transverse Loading

329
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
329

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相关实验视频

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使用3D骨架基变形进行压缩的非刚性动态人类点云序列的时间估计.

Jin-Kyum Kim1, Ye-Won Jang1, Sol Lee1

  • 1Electronic Materials Engineering, Kwangwoon University, Kwangwoon-ro 20, Seoul 01897, Republic of Korea.

Sensors (Basel, Switzerland)
|August 26, 2023
PubMed
概括

本研究介绍了一种新的算法,通过估计非刚性运动来压缩动态3D点云序列 (PCS). 该方法通过利用时间相关性,能够高效地重建3D点云 (PCF),类似于2D视频压缩.

关键词:
一个3D骨架.增强现实 (AR) 是一种增强现实.变形变形的情况动态点云是一个动态点云.构成估计估计的估计.时间预测时间预测.虚拟现实 虚拟现实 虚拟现实 虚拟现实

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科学领域:

  • 计算机视觉 计算机视觉
  • 3D 图形 3D 图形
  • 数据压缩数据压缩

背景情况:

  • 动态3D点云序列 (PCS) 对高效传输和重建提出了挑战.
  • 现有的方法经常与人类或可变形物体点云固有的非刚性运动作斗争.
  • 3D数据的压缩技术落后于2D图像的压缩技术.

研究的目的:

  • 开发一种算法,通过时间运动估计来传输和重建动态3D点云序列 (PCS).
  • 通过将2D视频压缩原理适应3D非刚性运动,使3D点云 (PCF) 的有效压缩成为可能.
  • 提供一种方法来使用关键PCF,运动向量和剩余点云重建目标PCF.

主要方法:

  • 该算法将PCS分为组,选择一个关键PCF,并通过3D姿势估计估计3D骨运动.
  • 非刚性点云被转换为网状模型,与3D骨架准,并变形以匹配目标PCF.
  • 生成剩余点云,并使用关键PCF,运动向量和剩余PC实现重建.

主要成果:

  • 实验结果表明,3D点云序列的成功压缩.
  • 拟议的方法有效地估计并利用非刚性3D运动进行压缩.
  • 该算法显示了高压缩效率的潜力,当与现有的点云压缩 (PCC) 技术相结合时.

结论:

  • 拟议的算法将2D运动估计扩展到3D非刚性物体运动,以有效地压缩点云.
  • 它为压缩动态3D点云数据提供了一种可行的方法,特别是对于人类运动.
  • 未来与MPEG PCC等标准的整合可能会导致高效的3D数据传输系统.