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相关概念视频

Computed Tomography01:10

Computed Tomography

4.6K
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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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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...
5.6K
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

8.2K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
8.2K
Light Acquisition02:16

Light Acquisition

8.5K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.5K
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

4.8K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
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相关实验视频

Updated: Jul 16, 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

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全分辨率和全动态范围编码的孔径压缩时间成像全分辨率和全动态范围.

Ping Wang, Lishun Wang, Mu Qiao

    Optics letters
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    此摘要是机器生成的。

    编码光圈压缩时光成像 (CACTI) 在单拍视频捕捉中实现了高率. 我们增强的CACTI系统使用灰度面罩和混合深度网络来提高空间分辨率和动态范围.

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    相关实验视频

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    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 计算成像技术的成像
    • 计算机视觉 计算机视觉

    背景情况:

    • 编码光圈压缩时成像 (CACTI) 能够使用2D传感器进行高速视频捕捉,减少数据需求.
    • 现有的CACTI方法由于光学设计不足而受到空间分辨率和动态范围的限制.

    研究的目的:

    • 开发一个高效的CACTI系统,克服以前的分辨率和动态范围的限制.
    • 引入一种新的光学调制和采样策略,以改善图像采集.

    主要方法:

    • 在传感器和调制器之间精确地进行一对一的像素映射.
    • 使用结构灰度面罩而不是二进制面罩.
    • 开发一个混合卷积变压器深度网络用于框架重建.

    主要成果:

    • 与之前的CACTI系统相比,空间分辨率显著改善.
    • 在重建的视频中实现了显著更大的动态范围.
    • 使用模拟和现实世界的实验数据验证了系统的有效性.

    结论:

    • 拟议的CACTI系统在空间分辨率和动态范围方面提供了卓越的性能.
    • 混合深度学习网络有效地从压缩数据中重建高质量的视频.
    • 这一进步为更有能力的单拍高速成像应用铺平了道路.