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相关概念视频

Fischer Projections02:18

Fischer Projections

13.5K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines.
13.5K
Newman Projections02:06

Newman Projections

17.0K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
17.0K

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相关实验视频

Updated: Jul 28, 2025

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

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基于物理的高效全投影机补偿,仅使用自然图像.

Yuqi Li, Wenting Yin, Jiabao Li

    IEEE transactions on visualization and computer graphics
    |May 31, 2023
    PubMed
    概括
    此摘要是机器生成的。

    本研究介绍了基于物理的投影机-摄像机 (Procams) 系统的框架,以实现全面的投影机补偿. 该方法适应纹理表面和使用自然图像的运动,提高图像质量和效率.

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    相关实验视频

    Last Updated: Jul 28, 2025

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    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
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    科学领域:

    • 计算机视觉 计算机视觉
    • 图形 图形 图形 图形 图形 图形
    • 图像处理 图像处理

    背景情况:

    • 投影仪补偿对于在各种表面上准确显示至关重要.
    • 现有的方法往往需要额外的模式或与动态变化作斗争.

    研究的目的:

    • 开发一个基于物理的框架,用于在投影机-摄像机 (Procams) 系统中完全补偿投影机.
    • 为了能够快速适应纹理表面和意想不到的移动,而不会中断显示.

    主要方法:

    • 将全投影机补偿处理为数值优化问题.
    • 使用自然图像解和估计Procams的因素 (投影机响应,摄像机对应,表面反射率).
    • 实施基于物理的框架,用于几何校准和放射性补偿.

    主要成果:

    • 与最先进的方法相比,显示出更高的图像质量.
    • 实现了较短的计算时间和较低的内存消耗.
    • 展示了更高的几何精度和更紧的网络架构.

    结论:

    • 拟议的基于物理的框架为ProCams提供了一个可解释和灵活的解决方案.
    • 该方法有效地处理几何和反射率的动态变化.
    • 这种方法在性能和效率方面超过了现有的端到端补偿方法.