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相关概念视频

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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相关实验视频

Updated: Jul 6, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

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超分辨率太赫兹合成光圈图像重建算法

Ningbo Wang, Feng Qi

    Applied optics
    |January 4, 2024
    PubMed
    概括

    我们开发了一种新的超高分辨率算法,以改善太赫兹 (THz) 近场合成光圈雷达 (NSAR) 成像. 这种方法显著提高了图像分辨率,克服了THz技术应用之前方法的局限性.

    科学领域:

    • 电磁学 电磁学 电磁学 电磁学
    • 影像科学 影像科学
    • 光学是什么?光学是什么?光学是什么?

    背景情况:

    • 特拉赫兹 (THz) 近场合成光圈雷达 (NSAR) 成像受到了低分辨率的困扰.
    • 限制包括狭窄的天线光束宽度和以前算法中未解决的电磁波损失.
    • 增强分辨率对于推进THz技术应用至关重要.

    研究的目的:

    • 为THz NSAR成像提出和评估一个超分辨率算法.
    • 为了显著提高重建的THz图像的侧面分辨率.
    • 解决现有的NSAR成像算法的局限性.

    主要方法:

    • 使用了NSAR成像系统的前置数学模型.
    • 使用反向投影算法 (BPA) 来计算点差函数 (PSF).
    • 在BPA重建的NSAR图像上应用解卷处理,以提高分辨率.

    主要成果:

    • 拟议的算法成功地提高了THz NSAR图像的侧向分辨率.
    • 实验结果显示分辨率为0.67λ,这是一个显著的改善.
    • 模拟和实验验证了开发方法的有效性.

    更多相关视频

    High-Throughput Total Internal Reflection Fluorescence and Direct Stochastic Optical Reconstruction Microscopy Using a Photonic Chip
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    Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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    相关实验视频

    Last Updated: Jul 6, 2025

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

    Published on: February 12, 2014

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    High-Throughput Total Internal Reflection Fluorescence and Direct Stochastic Optical Reconstruction Microscopy Using a Photonic Chip
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    High-Throughput Total Internal Reflection Fluorescence and Direct Stochastic Optical Reconstruction Microscopy Using a Photonic Chip

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    Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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    结论:

    • 新的超高分辨率THz NSAR成像算法提供了显著的分辨率改进.
    • 这一进步有可能扩大THz成像的应用范围.
    • 该方法克服了当前THz NSAR成像技术的关键局限性.