in models_all.py [0:0]
def upscale2d(x, factor=2, gain=1):
assert x.dim() == 4
if gain != 1:
x = x * gain
if factor != 1:
shape = x.shape
x = x.view(shape[0], shape[1], shape[2], 1, shape[3], 1).expand(
-1, -1, -1, factor, -1, factor
)
x = x.contiguous().view(
shape[0], shape[1], factor * shape[2], factor * shape[3]
)
return x