In general, the two steps:

1. Radical finding

2. Dimension reduction with found radicals

can be iterated multiple times and the obtained radical basis can be used to represent any Chinese character. And, yes, I think that basis is going to be similar to the Cangjie input method.

I am not sure how fruitful or useful that representation would be. It depends on the purposes for its use. For example, in general the Machine Learning (ML) algorithms that provide good explanations are not that good for, say, ML classification or approximation.

Thank you for your feedback, Silvia!

[...] I'm always a big fan of traditional statistical analysis!

That comment provided additional motivation to "wrap up" a first version of the post "Handwritten Arabic characters classifiers comparison".

In that post I show how using dimension reduction and nearest neighbors we can get better classification results than using "standard" convolutional networks. Of course, we also get additional insight.

One central interest on characters and fonts (not just CJK) is the topological relationship between strokes. It's somehow related but beyond properties in image space.

1. In the linked post I had to crop-&-resize the images in order to get better results. That is, in some sense, related to having hard time to "discover" the topology in Arabic characters.

2. Another approach is to actually make some cheap transformations that expose the topology. That is, of course, not that trivial.

3. People writing Chinese characters -- after years of schooling -- follow certain order of the strokes. I think that is much more fruitful type of data utilization. (And as far as I know it is used in the Chinese character completions in different OS'es.)

Thanks a lot for pinging me here!

This post elaborates on how to make the Rorschach animations: "Rorschach mask animations".

Can't wait to see it :)

Just a teaser here -- I plan to use the code (and explanations) in this post as a basis for submitting animated Rorschach test images for the "Computational Art Contest 2022".