Is there a way to recognize which of these scatter plots is "better"? I doubt better is the correct adjective, apologies for that. What I mean is this:
I have a set of files (1200~) each paired with a scatterplot image. I need to find a way to classify which data files will have scatter plots that a person would classify as "clearly separated data"(again, not the right words), and which ones as "not clearly separated".
For example:






The first and second scatter plots are examples of data that would end classified as "good" or "clear", while the third one would be classified as "unclear". Are there metrics or distances that could be applied on the data to predict wheter the plots generated by that file would be of either the first kind or the second?

Thanks for taking the time to read this. I'm new to this, and english is not my first language.
You could:


Label manually few of them (say 100-150), then train a simple model to classify data. A small Random Forest could do the job well.
Train a super basic model on the each dataset used to produce each scatterplot. Something like a Linear Classifier. If the Classifier doesn't make mistakes, you have "clearly separated data", if it makes mistakes then it's likely to be the opposite.