I think writing a custom Dataset class with scipy.io.loadmat() in your __getitem__() method would be the easiest option. Although with 11 channels you won’t be able to convert/transform them with PIL.
It depends how you have your dataset structured but something like this:
class MyDataset(Dataset):
"""custom dataset for .mat images"""
def __init__(self, list_of_urls):
self.list_of_urls = list_of_urls
def __len__(self):
return len(self.list_of_urls)
def __getitem__(self, index):
image_url = self.list_of_urls[index]
image = scipy.io.loadmat(image_url)
label = ...
...