Describing a certain quality of an image Generally I guess I’m asking for a source of image processing terminology.

Specifically here I’m trying to find the word for the quality that would identify the main difference between the Mondriaan on the left and the Monet on the right. Graphical/strong edges vs no solid areas and no well-defined edges. 

I know a good amount about image processing but this vocab part is a glaring omission for me.
The Monet image appears to have a much higher entropy.  Whereas the Mondrian image looks like it could very likely be compressed losslessly into a lower number of bits (depending on the compression method) due to a lower informational entropy.