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相关概念视频

Upsampling01:22

Upsampling

238
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
238

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相关实验视频

Updated: Jul 8, 2025

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis
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坐标空间编码与刺激的参数向下转换.

Yang Xu, Sirui Tang, A Nicholas Black

    Optics express
    |December 13, 2023
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    概括
    此摘要是机器生成的。

    研究人员将直角光学编码扩展到图像传输的空间域. 这种方法在刺激的参数向下转换中使用相结合来编码和解码空间图像信息,从而实现安全传输和偏差校正.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 量子信息科学 量子信息科学
    • 图像处理 图像处理

    背景情况:

    • 正角光学编码是经典的多用户通信网络中的一个关键技术.
    • 目前的方案主要在时间域中运行.

    研究的目的:

    • 将直角光学编码从时间域扩展到空间域.
    • 使用空间光学编码编码和解码图像信息.
    • 探索安全图像传输和偏差校正中的应用.

    主要方法:

    • 利用受刺激的参数向下转换的相结合性质.
    • 用相罩将图像信息编码到种子光束上.
    • 在置束的动量空间中使用校正相罩解码图像.

    主要成果:

    • 置光束继承了种子光束编码的场信息的复杂结合体.
    • 一个初始编码相罩模糊了将图像转移到置光束的图像.
    • 一个纠正相位面罩成功地恢复了原始图像.

    结论:

    • 空间直角光学编码是可行的,使用刺激的参数向下转换和相结合.
    • 开发的方案为安全的图像传输提供了潜力.
    • 该技术也可以应用于异常取消和频率转换成像.