Comments (1)
Hi,
Since this is in main.py
it's about training. The training process uses the high resolution (HR) training images, downscales to get the low res (LR) input
image, and upscales the input
image to get bicubic
. It doesn't do that with the full image, only a random patch of it. The patch size is a parameter of main.py (default is 40x40). The data loader picks a training HR image, downscales it by the scaling_factor to get the LR image. Then it extracts the patch from the LR image, and the corresponding larger patch from the HR image. It also upscales the small patch to get the bicubic (see dataset.py for details). The default batch is 1, so by default, it does the process with one single image in each iteration, but if you change the batch to larger numbers then obviously it repeats it that many times. In the code snippet you quoted, the data is passed from the data loader (batch
) to these new variables (input
, target
, and bicubic
).
(It also turns the data to torch's Variable class instead of eg. a numpy array or whatever the original data format is.)
from dbpn-pytorch.
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from dbpn-pytorch.