Problem about "4.4 Experiments on Spatially Variant Degradation"

[YuqiangY]

Thanks for your amazing work!
But I have a question that does " synthesize an LR image with spatially variant blur kernels and noise levels" in 4.4 mean one image and multiple anisotropic Gaussian kernels and noises?
And is the model trained and tested with only isotropic Gaussian kernel as input in this experiment?
If you could tell me more details, I will appreciate it!