How worse is the performance of CornerNet if it is configured as only one stack of Houglass Net?

[ZSQflower]

Thanks for your excellent contribution. In CornerNet, 2 stacks of Hourglass is employed for keypoint detection. I'm intereseted in how better or worse if CornerNet is configured as 1 stack or 3 stacks? Or, is '2 stacks Hourglass' configuration the minimum requirement for Key Point detection？Thanks.

[sallamander]

@ZSQflower don't know if you've seen it, but the authors of the original Stacked Hourglass Networks paper do a bit of analysis on this, shown in figures 8 and 9. Their results suggest that a network should still be able to converge and perform reasonably well with a single hourglass, but that there is a noticeable difference (albeit a diminishing one) in performance as more hourglass networks are added.

[2018newyangyu]

How to modify the network to only one stack of Houglass Net?Thanks.