I want to implement the algorithm from the paper DhyaaAlrahman Latef Thajel1, Kadhim Mahdi Hashim1 - A New Technique for Data Compression. However in section 3.1.1, it says that it needs a binary image as input.
My question is, does it mean that the method only applies to binary data (black and white)? Or that it applies to any image (as RGB) but that it needs to be converted before? if yes, how?