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Determining 3D Flow Fields via Multi-camera Light Field Imaging

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An seamless stitching method for large field equivalent center projection image based on rotating camera.

Chunmei Li¹, Jiuyun Sun², Xinnai Zhang³

¹School of Geodesy and Geomatics, Jiangsu Normal University, Xuzhou, China.

Scientific Reports

|November 25, 2024

Summary

This study introduces a novel rotating camera method to overcome digital camera limitations in close-range photogrammetry. The technique significantly enhances image coverage and resolution for precision industrial applications.

Keywords:

Close-range photogrammetry Large-field image Rotating camera Seamless stitching

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Area of Science:

Photogrammetry
Computer Vision
Precision Engineering

Background:

Digital cameras in close-range photogrammetry suffer from narrow fields of view and low resolution.
These limitations hinder accurate measurements in high-precision industrial applications.

Purpose of the Study:

To propose a large-format image acquisition method for rotating cameras.
To address the limitations of digital cameras in precise close-range photogrammetry.

Main Methods:

Designed a structurally relaxed rotating camera system.
Developed a rigorous seamless stitching model for large-format images.
Created a large-format equivalent central projection image acquisition mechanism.

Main Results:

The rotating camera method effectively increases image coverage from a single camera station.
Image resolution was significantly improved, with a large-format image size of 4977 × 671 pixels achieved from a single image size of 916 × 687 pixels.
Demonstrated increased coverage and resolution through experimental validation.

Conclusions:

The proposed method overcomes the small field of view issue of digital cameras.
This technique provides theoretical support for advancements in precision close-range photogrammetry and industrial engineering.