How to output Box and Box std?

[C.Hen]

hello， @yihui-he ，I'm reading your paper, confused about the way of model outputting Box and Box std. As figure 3 shows in you paper,

Is the Box std generated by adding another fully connected layer in the model? Beyond that, have you added dropout operation in you model to produce uncertainty?
thanks in advance.

[Ethan He]

Is the Box std generated by adding another fully connected layer in the model? yes
added dropout operation in you model to produce uncertainty? no