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相关概念视频

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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X-ray Imaging01:24

X-ray Imaging

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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相关实验视频

Updated: Jul 6, 2025

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
10:28

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Published on: July 5, 2016

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端到端压缩意识的计算机生成全息图.

Mi Zhou, Hao Zhang, Shuming Jiao

    Optics express
    |January 5, 2024
    PubMed
    概括
    此摘要是机器生成的。

    这项研究引入了一种创新方法,用于生成优化为联合摄影专家组 (JPEG) 压缩的全息图. 这种JPEG意识的方法显著减少了扭曲和文件大小,同时保持了高的重建质量.

    更多相关视频

    Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
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    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

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    相关实验视频

    Last Updated: Jul 6, 2025

    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
    10:28

    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

    Published on: July 5, 2016

    10.3K
    Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
    10:16

    Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

    Published on: February 8, 2014

    12.3K
    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
    09:04

    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

    Published on: January 14, 2020

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    科学领域:

    • 计算机视觉 计算机视觉
    • 数字成像技术的数字成像.
    • 全息影像的使用方法.

    背景情况:

    • 联合摄影专家组 (JPEG) 的压缩是数字图像的标准,但会导致全息投影的严重扭曲.
    • 现有的方法缺乏优化JPEG压缩,导致质量下降.

    研究的目的:

    • 开发一种方法来生成对JPEG压缩有强度的全息图.
    • 为了提高全息投影质量,并在JPEG压缩下减少文件大小.

    主要方法:

    • 引入了一种新的可微分模型,将全息生成和JPEG压缩合并为端到端优化.
    • 利用高效的第一阶级解决器进行联合优化.

    主要成果:

    • 在相同的压缩速率下,在峰值信号与噪声比率 (PSNR) 中获得了4dB的显著改进,在结构相似性 (SSIM) 中获得了0.27的显著改进.
    • 将压缩全息图文件大小减少约35%,同时保持重建质量.
    • 在模拟和实验原型中证明了对JPEG压缩损失的稳定性.

    结论:

    • 与传统方法相比,提出的JPEG意识端到端优化的全息图提供了更高的质量和效率.
    • 该方法生成与JPEG标准兼容的全息图,确保与商业软件和边缘设备广泛适用.