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Downsampling

Downsampling

When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...

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Updated: Sep 13, 2025

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

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Digital-twin imaging based on descattering Gaussian splatting.

Suguru Shimomura, Kazuki Yamanouchi, Jun Tanida

|July 30, 2025

Summary

This summary is machine-generated.

We developed a digital-twin imaging method using Gaussian splatting to reconstruct 3D objects obscured by scattering media. This technique successfully creates high-contrast digital twins from degraded images, advancing 3D imaging capabilities.

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Last Updated: Sep 13, 2025

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Area of Science:

Optics and Photonics
Computer Vision
Digital Imaging

Background:

3D imaging through scattering media is crucial for fields like medical science and astronomy.
Existing methods face challenges in reconstructing objects obscured by scattering effects.

Purpose of the Study:

To propose and demonstrate a novel digital-twin imaging method for observing objects behind scattering media.
To leverage Gaussian splatting and data assimilation for enhanced 3D reconstruction.

Main Methods:

Constructing a digital twin model using point clouds composed of Gaussians.
Simulating the scattering process via point spread function convolution.
Integrating data processing with image measurements for object reproduction.

Main Results:

Successfully constructed a high-contrast digital twin of a 3D object from degraded images.
Demonstrated the ability to reproduce 3D objects despite wavefront disturbances caused by scattering.
Validated the digital twin approach for imaging through scattering media.

Conclusions:

The proposed digital-twin imaging method effectively reconstructs 3D objects behind scattering media.
Gaussian splatting offers a powerful approach for creating digital twins in challenging imaging scenarios.
This technique integrates data processing and image measurements for robust 3D reconstruction.