class TiledSingleImageDataset(Dataset):
def __init__(self,
image_fname: str,
mask_fname: str,
image_loader: Callable,
target_loader: Callable,
tile_size,
tile_step,
image_margin=0,
transform=None,
target_shape=None,
keep_in_mem=False):
self.image_fname = image_fname
self.mask_fname = mask_fname
self.image_loader = image_loader
self.mask_loader = target_loader
self.image = None
self.mask = None
if target_shape is None or keep_in_mem:
image = image_loader(image_fname)
mask = target_loader(mask_fname)
if image.shape[0] != mask.shape[0] or image.shape[1] != mask.shape[
1]:
raise ValueError(
f"Image size {image.shape} and mask shape {image.shape} must have equal width and height"
)
target_shape = image.shape
self.slicer = ImageSlicer(target_shape, tile_size, tile_step,
image_margin)
if keep_in_mem:
self.images = self.slicer.split(image)
self.masks = self.slicer.split(mask)
else:
self.images = None
self.masks = None
self.transform = transform
self.image_ids = [
id_from_fname(image_fname) +
f' [{crop[0]};{crop[1]};{crop[2]};{crop[3]};]'
for crop in self.slicer.crops
]
def _get_image(self, index):
if self.images is None:
image = self.image_loader(self.image_fname)
image = self.slicer.cut_patch(image, index)
else:
image = self.images[index]
return image
def _get_mask(self, index):
if self.masks is None:
mask = self.mask_loader(self.mask_fname)
mask = self.slicer.cut_patch(mask, index)
else:
mask = self.masks[index]
return mask
def __len__(self):
return len(self.slicer.crops)
def __getitem__(self, index):
image = self._get_image(index)
mask = self._get_mask(index)
data = self.transform(image=image, mask=mask)
return {
'features': tensor_from_rgb_image(data['image']),
'targets': tensor_from_mask_image(data['mask']).float(),
'image_id': self.image_ids[index]
}
class _InrialTiledImageMaskDataset(Dataset):
def __init__(
self,
image_fname: str,
mask_fname: str,
image_loader: Callable,
target_loader: Callable,
tile_size,
tile_step,
image_margin=0,
transform=None,
target_shape=None,
need_weight_mask=False,
keep_in_mem=False,
make_mask_target_fn: Callable = mask_to_bce_target,
):
self.image_fname = image_fname
self.mask_fname = mask_fname
self.image_loader = image_loader
self.mask_loader = target_loader
self.image = None
self.mask = None
self.need_weight_mask = need_weight_mask
if target_shape is None or keep_in_mem:
image = image_loader(image_fname)
mask = target_loader(mask_fname)
if image.shape[0] != mask.shape[0] or image.shape[1] != mask.shape[
1]:
raise ValueError(
f"Image size {image.shape} and mask shape {image.shape} must have equal width and height"
)
target_shape = image.shape
self.slicer = ImageSlicer(target_shape, tile_size, tile_step,
image_margin)
self.transform = transform
self.image_ids = [fs.id_from_fname(image_fname)] * len(
self.slicer.crops)
self.crop_coords_str = [
f"[{crop[0]};{crop[1]};{crop[2]};{crop[3]};]"
for crop in self.slicer.crops
]
self.make_mask_target_fn = make_mask_target_fn
def _get_image(self, index):
image = self.image_loader(self.image_fname)
image = self.slicer.cut_patch(image, index)
return image
def _get_mask(self, index):
mask = self.mask_loader(self.mask_fname)
mask = self.slicer.cut_patch(mask, index)
return mask
def __len__(self):
return len(self.slicer.crops)
def __getitem__(self, index):
image = self._get_image(index)
mask = self._get_mask(index)
data = self.transform(image=image, mask=mask)
image = data["image"]
mask = data["mask"]
data = {
INPUT_IMAGE_KEY: image_to_tensor(image),
INPUT_MASK_KEY: self.make_mask_target_fn(mask),
INPUT_IMAGE_ID_KEY: self.image_ids[index],
"crop_coords": self.crop_coords_str[index],
}
if self.need_weight_mask:
data[INPUT_MASK_WEIGHT_KEY] = tensor_from_mask_image(
compute_weight_mask(mask)).float()
return data