How to use this layer in my model?

[lemon0705-l]

from guided_filter_pytorch.guided_filter import FastGuidedFilter

hr_y = FastGuidedFilter(r, eps)(lr_x, lr_y, hr_x)
r, eps，lr_x,lr_y,hr_xr,What are these parameters referring to?

from guided_filter_pytorch.guided_filter import GuidedFilter

hr_y = GuidedFilter(r, eps)(hr_x, init_hr_y)

[Wu Huikai]

r & eps is hyper-params of GuidedFilter, where r is the radius of the filter and eps is a regulation term.
lr_x & hr_x is the low/high-resolution input image, lr_y is the low-resolution output.