The interpolation used to upsample/downsample the image about sinddm HOT 2 OPEN

Hi, we use LANCZOS to create the downsampled versions of the image, and BILINEAR to create their blurry upsampled versions for training. We use the same bilinear interpolation during upsampling in the sampling process.

from sinddm.

Hi, thanks for you reply! It helps a lot. I have another question on the math part.

• Do you have an exact formula for the relationship between $x_{t}^{s}$ and $x_{t-1}^{s}$?

Because in your paper there is only the relationship between $x_{t}^{s}$ and $x_{t}^{s, \text{mix}}$ as shown below

$x_{t}^{s} = \sqrt{\bar{\alpha}_t} x_{t}^{s, \text{mix}} + \sqrt{1-\bar{\alpha}_t} \epsilon$

from sinddm.