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Generalize number of bands calculation in to_tensor #1781

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Merged
fmassa merged 1 commit into from
Jan 22, 2020
Merged

Generalize number of bands calculation in to_tensor #1781

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10 changes: 2 additions & 8 deletions torchvision/transforms/functional.py
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Original file line number Diff line number Diff line change
Expand Up @@ -85,14 +85,8 @@ def to_tensor(pic):
img = 255 * torch.from_numpy(np.array(pic, np.uint8, copy=False))
else:
img = torch.ByteTensor(torch.ByteStorage.from_buffer(pic.tobytes()))
# PIL image mode: L, LA, P, I, F, RGB, YCbCr, RGBA, CMYK
if pic.mode == 'YCbCr':
nchannel = 3
elif pic.mode == 'I;16':
nchannel = 1
else:
nchannel = len(pic.mode)
img = img.view(pic.size[1], pic.size[0], nchannel)

img = img.view(pic.size[1], pic.size[0], len(pic.getbands()))
# put it from HWC to CHW format
# yikes, this transpose takes 80% of the loading time/CPU
img = img.transpose(0, 1).transpose(0, 2).contiguous()
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