An adaptive-PCA algorithm for reflectance estimation from color images

• Published in: 2008 19th International Conference on Pattern Recognition pp. 1 - 4
• Main Authors: Mansouri, A., Sliwa, T., Hardeberg, J.Y., Voisin, Y.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-12-2008
• Subjects: Cameras; Color; Equations; Image reconstruction; Layout; Optical filters; Optical surface waves; Pixel; Principal component analysis; Reflectivity
• ISBN: 9781424421749; 1424421748
• ISSN: 1051-4651; 2831-7475
• DOI: 10.1109/ICPR.2008.4761120

This paper deals with the problem of spectral reflectance estimation from color camera outputs. Because the reconstruction of such functions is an inverse problem, stabilizing the reconstruction process is highly desirable. One way to do this is to decompose reflectance function on a basis functions like PCA. The present work proposes an algorithm making PCA adaptive in reflectance estimation from a color camera output. We propose to adapt the PCA basis derivation by selecting, for each sample, the more relevant elements from the training set elements. The adaptivity criterion is achieved by a likelihood measurement. Finally, the spectral reflectance estimation results are evaluated with the commonly used goodness-of-fit coefficient (GFC) and ¿E color difference, and prove the reliability of the proposed methods.