Robot-aided Hyperspectral Imaging For Mineral Exploration in Underground Mining Environments

New mining and exploration projects have revived across Europe with an increasing demand for critical raw materials driven by the energy transition and unstable political conditions. Hyperspectral imaging proves to be an excellent tool for quick and efficient non-invasive mineral exploration. By mounting hyperspectral- and LiDAR sensors on...

On the Influence of Whitening Transformations on Hyperspectral Data

The whitening transformation transforms a random matrix into a whitened matrix with expectation 0 and covariance matrix I. By removing the first and second order statistical structures, higher order structures can be looked at for better classification. This is why Stage Gate 11 B.V. has employed whitening in the preprocessing of their...

Hyperspectral imaging for the detection of malignant ovarian cancer metastases: Ex vivo pilot study with advanced-stage ovarian cancer patients

BACKGROUND: Ovarian cancer is the number eight cause of cancer-related mortality in women around the world and has an incidence of more than 295 000 and mortality of almost 158 000. The most important prognostic factor for the survival of advanced-stage ovarian cancer is the complete resection of all microscopic tumour tissue during...

Potential enrichments in malaria diagnostics: hyperspectral imaging and group-equivariant neural networks

Proper diagnostics are essential in the combat against severe diseases which mainly have big impacts in remote areas in poor countries. A focus direction within the NC4I group at DCSC, Delft University of Technology, is the development of new imaging modalities and the design and implementation of smarter algorithms for improved detection of...

Tissue Characterization by Deep Learning in Medical Hyperspectral Images

Hyperspectral imaging (HSI) is a promising imaging modality in medical applications, especially for non-invasive and non-contact disease diagnosis and image-guided surgery. Encoding both spatial and spectral information, it can detect subtle changes in the biochemical and morphological properties of a tissue, revealing the early progression of a...

Evaluating the Translation of Diffuse Reflectance Spectroscopy into Hyperspectral Imaging: Bridging the gaps between the two technologies

Breast cancer is the most prevalent cancer in women with about 1.7 million new cases reported worldwide in 2012. The two main types of surgical treatment for breast cancer are mastectomy and lumpectomy. In mastectomy, the entire affected breast is excised whereas in lumpectomy only the tumor along with a rim of healthy tissue is excised. This...

Mapping the kaolin mineralization of the St. Austell Granite (SW England) using VNIR and SWIR hyperspectral imaging

The St. Austell area (SW England) is known for its high quality and world-class size kaolin deposits and has a long history of kaolin mining. Mining started in the high grade zones. However, in recent years, mining is moving closer to lower grade zones and sees an increase in iron-impurities within the ore. The kaolin mineral assemblage consists...