The paper "Fast computation of residual complexity image similarity metric using low-complexity transforms" by Yves Pauchard, Renato J. Cintra, Arjuna Madanayake, and Fábio M. Bayer is ranked second in the list of most downloaded papers from IET Image Processing.
A screenshot of the top list is available: here.
There are much more to be done in terms of applying efficient discrete transforms in the biomedical problems.
Congratulations to all authors!
PS: Thanks to Dr Bayer for this information.