What is the opt.large parameter used for ?

[aneesh3108]

Hi Scott,

I am curious as to what the opt.large parameter in main_cls.lua used for?

Also, in the below figure:

Lines 109 - 130 are exactly for what purpose? I see its down sampling from 1024 to 256 and upsampling back, but don't know the motive.
Similarly in the next instance, its 512-> 128 -> 128 -> 512. Is there a specific purpose for doing this?

Thanks.