Working with tiff images shouldn’t be any different from working with jpeg. You can use some library for loading images, like PIL, and then use torchvision.transforms to transform it to a torch.Tensor:
from PIL import Image
from torchvision.transforms import ToTensor
image = Image.open('/path/to/image.tif')
image = ToTensor()(image)

To learn more about loading images, and piping them nicely to torch models, read this tutorial:
http://pytorch.org/tutorials/beginner/data_loading_tutorial.html 441