image file
matplotlib
imread
https://matplotlib.org/api/_as_gen/matplotlib.pyplot.imread.html
MetPy Mondays
`#119 - Custom Colormaps : Unidata Developer's Blog
https://www.unidata.ucar.edu/blogs/developer/entry/metpy-mondays-119-custom-colormaps
scikit-image
spm-image
: Sparse modeling and Compressive sensing in Python