This article presents a method to remove watermarks from watermarked spectral images. The watermarks were added through the Principal Component Analysis (PCA). The removal is also performed using the PCA transform. Experimental results indicate that the removal of the watermark can be performed successfully.
Jarno Mielikainen, Pekka Toivanen, "Removal of Watermarks from Spectral Images Through Principal Component Analysis" in Journal of Imaging Science and Technology, 2005, pp 474 - 480, https://doi.org/10.2352/J.ImagingSci.Technol.2005.49.5.art00004