Low rank approximation of grayscale image based on SVD
Eckhart, University of Chicago
See
svd_eckhart.jl
for the detail.
Reading RGB Image
Original Grayscale Image A=A(480)
480 by 640 matrix, rank(A)=480
A(10): the best approximation by matirices of rank 10
A(40): the best approximation by matirices of rank 40
A(70): the best approximation by matirices of rank 70
A(100): the best approximation by matirices of rank 100