Re: Understanding the architecture?

[Nate1]

Here is an image of an auto generated dependencies graph, with only a few of the packages and classes expanded. As you can see the amount of information is overwhelming. 

[Sean Owen]

I think this question is too broad to answer. What language? what component?

I think it's pretty simple, but then again I've looked at it for years. The javadoc should be pretty comprehensive.

Start with core/ only.

Start from a Reader implementation and go from there, like .qrcode.Reader. If you understand that you'll understand 90% of it, since the rest follows the same pattern.