Estimate the signal to noise ratio of a hyperspectral image.
estSNR(data, p)The hyperspectral image whose signal to noise ratio needs to be estimated. Samples in rows, frequencies in columns.
The number of endmembers.
The estimated signal to noise ratio in decibels.
Be careful,
when this function is called by vca05 the data is already
transposed due to
lazy evaluation. If you want to get the same answer by calling this function
directly, you'll need to transpose the data first!
Nascimento, J.M.P. and Bioucas Dias, J.M. "Vertex component analysis: a fast algorithm to unmix hyperspectral data," Geoscience and Remote Sensing, vol. 43, no. 4, pp. 898-910, April 2005, doi: 10.1109/TGRS.2005.844293