CODE EXAMPLE FOR PYTHON

Image loader RGB transform

While loading your images, you could use Image.open(path).convert('RGB') on all images.
If you are using ImageFolder, this functionality should be already there using the default loader.

def myloader(filename):
    return Image.open(filename).convert('RGB')


dog_test = datasets.ImageFolder('/data/dog_images/test',transform = valid_transform,loader=myloader)
test = torch.utils.data.DataLoader(dataset=dog_test,batch_size=64)