The way of transforming apollo color to train_id

[cfzd]

@cardwing
Hi, I noted that you used the equation B x 5 + G x 3 + R to encode the color to some ids, then map the ids to the train_id like here and here. It's a very smart way to convert the color label to train_id.

I wonder how you figure this out or how the coefficient is obtained? The combination of 5,3 and 1 is just a guess?

[cardwing]

Yes. The coefficient is selected to make sure that each transformed id is unique.