Add \mathbb symbols

[phikal]

When I draw a blackboard character like ℕ, I'd expect \mathbb{N} to be mentioned, but instead I only get a suggestion from dsfonts. I think the former should be included as well.

[FineFindus]

Thanks for the suggestion, indeed only \mathbb{1} is currently included. Unfortunately, it is relatively hard to add new symbols, since they require a lot of training data to be classified accurately, and there is currently no way to get any. Also, I'm in the process of rewriting the classification backend, so it will probably be a while before they can be added.

[phikal]

OK, I'll be closing the issue then.

[FineFindus]

I didn't mean that it won't be implemented, just that it will take some time (it will be faster with help :)).

[phikal]

Oh, my bad. What kind of help could you need?

[FineFindus]

I'm currently sorting the data that detexify (the classification backend) uses for classification, as it contains a bunch of misclassified data. For example, the lambda symbol contains 3 lambda symbols, while the rest is mostly chi.

So if you have any idea how to automate the process (there are 44k data points) or want to help sort them manually, your help is more than welcome :)

After this is done, I would like to look into implementing a method to create new symbols (e.g. through user contributions), which will likely require multiple people to draw the symbol, to increase the variation of it.

[FineFindus]

Implemented in https://github.com/FineFindus/Hieroglyphic/commit/ab1171d94cf81c0a4867c6f51dcc4734305e0cb. However, due to the nature of the training data (sparse and not a lot of variation), the model may fail to find the symbols. If you want to help, feel free to opt into data contribution, draw and select the symbol.