Emissivity retrieval from indoor hyperspectral imaging of mineral grains

摘要

The proposed approach addresses the problem of retrieving the emissivity of hyperspectral data in the spec-troscopic imageries from indoor experiments. This methodology was tested on experimental data that have been recorded with hyperspectral images working in visibleear infrared and long-wave infrared bands. The proposed technique provides a framework for computing down-welling spectral radiance applying non-negative matrix factorization (NMF) analysis. It provides the necessary means for the non-uniform correction of active thermographical experiments. The obtained results indicate promising accuracy. In addition, the application of the proposed technique is not limited to non-uniform heating spectroscopy but to uniform spectroscopy as well.