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相关概念视频

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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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相关实验视频

Updated: Sep 10, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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使用混合光学和质量中心算法进行失焦校正和降噪

Zhiyuan Ding1, Chen Huang2, Adrián Pedrazo-Tardajos2

  • 1Department of Materials, University of Oxford, Oxford, UK.

Journal of microscopy
|August 21, 2025
PubMed
概括
此摘要是机器生成的。

一种新的方法,侧带掩盖质量中心 (SBm-COM) 和集成质量中心 (SBm-iCOM),增强了4D扫描传输电子显微镜 (STEM) 的相对照成像. 这种技术可以减少噪音,并弥补偏差,改善具有挑战性的样品的成像.

关键词:
4DSTEM 在质量中心时间表偏差校正图形摄影

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科学领域:

  • 电子显微镜
  • 材料科学
  • 图像技术

背景情况:

  • 集成质量中心 (iCOM) 是一种使用4D扫描传输电子显微镜 (STEM) 的标准相对照成像方法.
  • 现有的方法面临着STEM数据集中的残余偏差和噪声的局限性.

研究的目的:

  • 介绍侧带掩盖的质量中心 (SBm-COM) 和集成的质量中心 (SBm-iCOM) 用于弱相对象成像.
  • 改善4DSTEM中的偏差补偿和降噪.
  • 在相对照成像中增强低频信息传输.

主要方法:

  • 将单面带 (SSB) 图形与质量中心 (COM) 和iCOM原则相结合.
  • 开发SBm-COM和SBm-iCOM用于分析4DSTEM数据集.
  • 在2α分辨率上实现偏差补偿和噪声过.

主要成果:

  • 在4DSTEM数据中,SBm-i) COM有效地弥补了剩余的误差.
  • 噪音贡献显著降低,改善图像质量.
  • 该方法适用于难以聚焦或需要低电子剂量的样品.
  • 它提供了一种内在的传输功能,可以增强低频信息.

结论:

  • 在4DSTEM中提供一种新且有效的相对照成像方法.
  • 这种方法提高了对具有挑战性的样品和低剂量条件的成像能力.
  • 与标准的SSB图形相比,SBm-iCOM在低频信息检索方面具有优势.