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Hand-held Clinical Photoacoustic Imaging System for Real-time Non-invasive Small Animal Imaging

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Hyperspectral Imaging for Identifying Foreign Objects on Pork Belly.

Gabriela Ghimpeteanu¹, Hayat Rajani², Josep Quintana¹

¹Coronis Computing SL, 17003 Girona, Spain.

Sensors (Basel, Switzerland)

|November 27, 2025

Summary

This summary is machine-generated.

Hyperspectral imaging (HSI) effectively detects foreign objects in pork, enhancing food safety. This automated quality control method shows high accuracy and efficiency, even with temperature variations.

Keywords:

food-processing industry foreign body detection hyperspectral imaging image segmentation machine learning vision transformer

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Published on: December 8, 2015

Area of Science:

Food Science and Technology
Spectroscopy
Computer Vision

Background:

Food safety and quality control in processing industries face challenges with contaminant detection.
Traditional visual inspection methods often fail to identify subtle contaminants.

Purpose of the Study:

To assess the feasibility of hyperspectral imaging (HSI) for detecting foreign objects on pork belly meat.
To develop an automated system for real-time quality control in food processing.

Main Methods:

Utilized a Specim FX17 hyperspectral camera for data acquisition in the 900-1700 nm range.
Implemented a segmentation approach using a lightweight Vision Transformer with pre- and post-processing.
Tested the system on images with and without contaminants, including under varying production-line temperatures.

Main Results:

The method achieved high detection accuracy, retaining most true positives and eliminating false positives on clean images.
The system demonstrated robustness against noise, temperature drift (10-55 °C), and spectral similarity.
Zero false positives were observed on a challenging set of 95 images with fat-like spectra.

Conclusions:

Hyperspectral imaging is a feasible technology for automated contaminant detection in pork processing.
The developed Vision Transformer-based approach offers high accuracy and training efficiency.
This HSI system supports real-time quality control, significantly improving food safety assurance.