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# Copyright 2025 The HuggingFace Team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import
math
import
warnings
from
typing
import
List
,
Optional
,
Tuple
,
Union
import
numpy
as
np
import
PIL
.
Image
import
torch
import
torch
.
nn
.
functional
as
F
from
PIL
import
Image
,
ImageFilter
,
ImageOps
from
.
configuration_utils
import
ConfigMixin
,
register_to_config
from
.
utils
import
CONFIG_NAME
,
PIL_INTERPOLATION
,
deprecate
PipelineImageInput
=
Union
[
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
,
List
[
PIL
.
Image
.
Image
],
List
[
np
.
ndarray
],
List
[
torch
.
Tensor
],
]
PipelineDepthInput
=
PipelineImageInput
def
is_valid_image
(
image
)
->
bool
:
r"""
Checks if the input is a valid image.
A valid image can be:
- A `PIL.Image.Image`.
- A 2D or 3D `np.ndarray` or `torch.Tensor` (grayscale or color image).
Args:
image (`Union[PIL.Image.Image, np.ndarray, torch.Tensor]`):
The image to validate. It can be a PIL image, a NumPy array, or a torch tensor.
Returns:
`bool`:
`True` if the input is a valid image, `False` otherwise.
"""
return
isinstance
(
image
,
PIL
.
Image
.
Image
)
or
isinstance
(
image
, (
np
.
ndarray
,
torch
.
Tensor
))
and
image
.
ndim
in
(
2
,
3
)
def
is_valid_image_imagelist
(
images
):
r"""
Checks if the input is a valid image or list of images.
The input can be one of the following formats:
- A 4D tensor or numpy array (batch of images).
- A valid single image: `PIL.Image.Image`, 2D `np.ndarray` or `torch.Tensor` (grayscale image), 3D `np.ndarray` or
`torch.Tensor`.
- A list of valid images.
Args:
images (`Union[np.ndarray, torch.Tensor, PIL.Image.Image, List]`):
The image(s) to check. Can be a batch of images (4D tensor/array), a single image, or a list of valid
images.
Returns:
`bool`:
`True` if the input is valid, `False` otherwise.
"""
if
isinstance
(
images
, (
np
.
ndarray
,
torch
.
Tensor
))
and
images
.
ndim
==
4
:
return
True
elif
is_valid_image
(
images
):
return
True
elif
isinstance
(
images
,
list
):
return
all
(
is_valid_image
(
image
)
for
image
in
images
)
return
False
class
VaeImageProcessor
(
ConfigMixin
):
"""
Image processor for VAE.
Args:
do_resize (`bool`, *optional*, defaults to `True`):
Whether to downscale the image's (height, width) dimensions to multiples of `vae_scale_factor`. Can accept
`height` and `width` arguments from [`image_processor.VaeImageProcessor.preprocess`] method.
vae_scale_factor (`int`, *optional*, defaults to `8`):
VAE scale factor. If `do_resize` is `True`, the image is automatically resized to multiples of this factor.
resample (`str`, *optional*, defaults to `lanczos`):
Resampling filter to use when resizing the image.
do_normalize (`bool`, *optional*, defaults to `True`):
Whether to normalize the image to [-1,1].
do_binarize (`bool`, *optional*, defaults to `False`):
Whether to binarize the image to 0/1.
do_convert_rgb (`bool`, *optional*, defaults to be `False`):
Whether to convert the images to RGB format.
do_convert_grayscale (`bool`, *optional*, defaults to be `False`):
Whether to convert the images to grayscale format.
"""
config_name
=
CONFIG_NAME
@
register_to_config
def
__init__
(
self
,
do_resize
:
bool
=
True
,
vae_scale_factor
:
int
=
8
,
vae_latent_channels
:
int
=
4
,
resample
:
str
=
"lanczos"
,
reducing_gap
:
int
=
None
,
do_normalize
:
bool
=
True
,
do_binarize
:
bool
=
False
,
do_convert_rgb
:
bool
=
False
,
do_convert_grayscale
:
bool
=
False
,
):
super
().
__init__
()
if
do_convert_rgb
and
do_convert_grayscale
:
raise
ValueError
(
"`do_convert_rgb` and `do_convert_grayscale` can not both be set to `True`,"
" if you intended to convert the image into RGB format, please set `do_convert_grayscale = False`."
,
" if you intended to convert the image into grayscale format, please set `do_convert_rgb = False`"
,
)
@
staticmethod
def
numpy_to_pil
(
images
:
np
.
ndarray
)
->
List
[
PIL
.
Image
.
Image
]:
r"""
Convert a numpy image or a batch of images to a PIL image.
Args:
images (`np.ndarray`):
The image array to convert to PIL format.
Returns:
`List[PIL.Image.Image]`:
A list of PIL images.
"""
if
images
.
ndim
==
3
:
images
=
images
[
None
, ...]
images
=
(
images
*
255
).
round
().
astype
(
"uint8"
)
if
images
.
shape
[
-
1
]
==
1
:
# special case for grayscale (single channel) images
pil_images
=
[
Image
.
fromarray
(
image
.
squeeze
(),
mode
=
"L"
)
for
image
in
images
]
else
:
pil_images
=
[
Image
.
fromarray
(
image
)
for
image
in
images
]
return
pil_images
@
staticmethod
def
pil_to_numpy
(
images
:
Union
[
List
[
PIL
.
Image
.
Image
],
PIL
.
Image
.
Image
])
->
np
.
ndarray
:
r"""
Convert a PIL image or a list of PIL images to NumPy arrays.
Args:
images (`PIL.Image.Image` or `List[PIL.Image.Image]`):
The PIL image or list of images to convert to NumPy format.
Returns:
`np.ndarray`:
A NumPy array representation of the images.
"""
if
not
isinstance
(
images
,
list
):
images
=
[
images
]
images
=
[
np
.
array
(
image
).
astype
(
np
.
float32
)
/
255.0
for
image
in
images
]
images
=
np
.
stack
(
images
,
axis
=
0
)
return
images
@
staticmethod
def
numpy_to_pt
(
images
:
np
.
ndarray
)
->
torch
.
Tensor
:
r"""
Convert a NumPy image to a PyTorch tensor.
Args:
images (`np.ndarray`):
The NumPy image array to convert to PyTorch format.
Returns:
`torch.Tensor`:
A PyTorch tensor representation of the images.
"""
if
images
.
ndim
==
3
:
images
=
images
[...,
None
]
images
=
torch
.
from_numpy
(
images
.
transpose
(
0
,
3
,
1
,
2
))
return
images
@
staticmethod
def
pt_to_numpy
(
images
:
torch
.
Tensor
)
->
np
.
ndarray
:
r"""
Convert a PyTorch tensor to a NumPy image.
Args:
images (`torch.Tensor`):
The PyTorch tensor to convert to NumPy format.
Returns:
`np.ndarray`:
A NumPy array representation of the images.
"""
images
=
images
.
cpu
().
permute
(
0
,
2
,
3
,
1
).
float
().
numpy
()
return
images
@
staticmethod
def
normalize
(
images
:
Union
[
np
.
ndarray
,
torch
.
Tensor
])
->
Union
[
np
.
ndarray
,
torch
.
Tensor
]:
r"""
Normalize an image array to [-1,1].
Args:
images (`np.ndarray` or `torch.Tensor`):
The image array to normalize.
Returns:
`np.ndarray` or `torch.Tensor`:
The normalized image array.
"""
return
2.0
*
images
-
1.0
@
staticmethod
def
denormalize
(
images
:
Union
[
np
.
ndarray
,
torch
.
Tensor
])
->
Union
[
np
.
ndarray
,
torch
.
Tensor
]:
r"""
Denormalize an image array to [0,1].
Args:
images (`np.ndarray` or `torch.Tensor`):
The image array to denormalize.
Returns:
`np.ndarray` or `torch.Tensor`:
The denormalized image array.
"""
return
(
images
*
0.5
+
0.5
).
clamp
(
0
,
1
)
@
staticmethod
def
convert_to_rgb
(
image
:
PIL
.
Image
.
Image
)
->
PIL
.
Image
.
Image
:
r"""
Converts a PIL image to RGB format.
Args:
image (`PIL.Image.Image`):
The PIL image to convert to RGB.
Returns:
`PIL.Image.Image`:
The RGB-converted PIL image.
"""
image
=
image
.
convert
(
"RGB"
)
return
image
@
staticmethod
def
convert_to_grayscale
(
image
:
PIL
.
Image
.
Image
)
->
PIL
.
Image
.
Image
:
r"""
Converts a given PIL image to grayscale.
Args:
image (`PIL.Image.Image`):
The input image to convert.
Returns:
`PIL.Image.Image`:
The image converted to grayscale.
"""
image
=
image
.
convert
(
"L"
)
return
image
@
staticmethod
def
blur
(
image
:
PIL
.
Image
.
Image
,
blur_factor
:
int
=
4
)
->
PIL
.
Image
.
Image
:
r"""
Applies Gaussian blur to an image.
Args:
image (`PIL.Image.Image`):
The PIL image to convert to grayscale.
Returns:
`PIL.Image.Image`:
The grayscale-converted PIL image.
"""
image
=
image
.
filter
(
ImageFilter
.
GaussianBlur
(
blur_factor
))
return
image
@
staticmethod
def
get_crop_region
(
mask_image
:
PIL
.
Image
.
Image
,
width
:
int
,
height
:
int
,
pad
=
0
):
r"""
Finds a rectangular region that contains all masked ares in an image, and expands region to match the aspect
ratio of the original image; for example, if user drew mask in a 128x32 region, and the dimensions for
processing are 512x512, the region will be expanded to 128x128.
Args:
mask_image (PIL.Image.Image): Mask image.
width (int): Width of the image to be processed.
height (int): Height of the image to be processed.
pad (int, optional): Padding to be added to the crop region. Defaults to 0.
Returns:
tuple: (x1, y1, x2, y2) represent a rectangular region that contains all masked ares in an image and
matches the original aspect ratio.
"""
mask_image
=
mask_image
.
convert
(
"L"
)
mask
=
np
.
array
(
mask_image
)
# 1. find a rectangular region that contains all masked ares in an image
h
,
w
=
mask
.
shape
crop_left
=
0
for
i
in
range
(
w
):
if
not
(
mask
[:,
i
]
==
0
).
all
():
break
crop_left
+=
1
crop_right
=
0
for
i
in
reversed
(
range
(
w
)):
if
not
(
mask
[:,
i
]
==
0
).
all
():
break
crop_right
+=
1
crop_top
=
0
for
i
in
range
(
h
):
if
not
(
mask
[
i
]
==
0
).
all
():
break
crop_top
+=
1
crop_bottom
=
0
for
i
in
reversed
(
range
(
h
)):
if
not
(
mask
[
i
]
==
0
).
all
():
break
crop_bottom
+=
1
# 2. add padding to the crop region
x1
,
y1
,
x2
,
y2
=
(
int
(
max
(
crop_left
-
pad
,
0
)),
int
(
max
(
crop_top
-
pad
,
0
)),
int
(
min
(
w
-
crop_right
+
pad
,
w
)),
int
(
min
(
h
-
crop_bottom
+
pad
,
h
)),
)
# 3. expands crop region to match the aspect ratio of the image to be processed
ratio_crop_region
=
(
x2
-
x1
)
/
(
y2
-
y1
)
ratio_processing
=
width
/
height
if
ratio_crop_region
>
ratio_processing
:
desired_height
=
(
x2
-
x1
)
/
ratio_processing
desired_height_diff
=
int
(
desired_height
-
(
y2
-
y1
))
y1
-=
desired_height_diff
//
2
y2
+=
desired_height_diff
-
desired_height_diff
//
2
if
y2
>=
mask_image
.
height
:
diff
=
y2
-
mask_image
.
height
y2
-=
diff
y1
-=
diff
if
y1
<
0
:
y2
-=
y1
y1
-=
y1
if
y2
>=
mask_image
.
height
:
y2
=
mask_image
.
height
else
:
desired_width
=
(
y2
-
y1
)
*
ratio_processing
desired_width_diff
=
int
(
desired_width
-
(
x2
-
x1
))
x1
-=
desired_width_diff
//
2
x2
+=
desired_width_diff
-
desired_width_diff
//
2
if
x2
>=
mask_image
.
width
:
diff
=
x2
-
mask_image
.
width
x2
-=
diff
x1
-=
diff
if
x1
<
0
:
x2
-=
x1
x1
-=
x1
if
x2
>=
mask_image
.
width
:
x2
=
mask_image
.
width
return
x1
,
y1
,
x2
,
y2
def
_resize_and_fill
(
self
,
image
:
PIL
.
Image
.
Image
,
width
:
int
,
height
:
int
,
)
->
PIL
.
Image
.
Image
:
r"""
Resize the image to fit within the specified width and height, maintaining the aspect ratio, and then center
the image within the dimensions, filling empty with data from image.
Args:
image (`PIL.Image.Image`):
The image to resize and fill.
width (`int`):
The width to resize the image to.
height (`int`):
The height to resize the image to.
Returns:
`PIL.Image.Image`:
The resized and filled image.
"""
ratio
=
width
/
height
src_ratio
=
image
.
width
/
image
.
height
src_w
=
width
if
ratio
<
src_ratio
else
image
.
width
*
height
//
image
.
height
src_h
=
height
if
ratio
>=
src_ratio
else
image
.
height
*
width
//
image
.
width
resized
=
image
.
resize
((
src_w
,
src_h
),
resample
=
PIL_INTERPOLATION
[
"lanczos"
])
res
=
Image
.
new
(
"RGB"
, (
width
,
height
))
res
.
paste
(
resized
,
box
=
(
width
//
2
-
src_w
//
2
,
height
//
2
-
src_h
//
2
))
if
ratio
<
src_ratio
:
fill_height
=
height
//
2
-
src_h
//
2
if
fill_height
>
0
:
res
.
paste
(
resized
.
resize
((
width
,
fill_height
),
box
=
(
0
,
0
,
width
,
0
)),
box
=
(
0
,
0
))
res
.
paste
(
resized
.
resize
((
width
,
fill_height
),
box
=
(
0
,
resized
.
height
,
width
,
resized
.
height
)),
box
=
(
0
,
fill_height
+
src_h
),
)
elif
ratio
>
src_ratio
:
fill_width
=
width
//
2
-
src_w
//
2
if
fill_width
>
0
:
res
.
paste
(
resized
.
resize
((
fill_width
,
height
),
box
=
(
0
,
0
,
0
,
height
)),
box
=
(
0
,
0
))
res
.
paste
(
resized
.
resize
((
fill_width
,
height
),
box
=
(
resized
.
width
,
0
,
resized
.
width
,
height
)),
box
=
(
fill_width
+
src_w
,
0
),
)
return
res
def
_resize_and_crop
(
self
,
image
:
PIL
.
Image
.
Image
,
width
:
int
,
height
:
int
,
)
->
PIL
.
Image
.
Image
:
r"""
Resize the image to fit within the specified width and height, maintaining the aspect ratio, and then center
the image within the dimensions, cropping the excess.
Args:
image (`PIL.Image.Image`):
The image to resize and crop.
width (`int`):
The width to resize the image to.
height (`int`):
The height to resize the image to.
Returns:
`PIL.Image.Image`:
The resized and cropped image.
"""
ratio
=
width
/
height
src_ratio
=
image
.
width
/
image
.
height
src_w
=
width
if
ratio
>
src_ratio
else
image
.
width
*
height
//
image
.
height
src_h
=
height
if
ratio
<=
src_ratio
else
image
.
height
*
width
//
image
.
width
resized
=
image
.
resize
((
src_w
,
src_h
),
resample
=
PIL_INTERPOLATION
[
"lanczos"
])
res
=
Image
.
new
(
"RGB"
, (
width
,
height
))
res
.
paste
(
resized
,
box
=
(
width
//
2
-
src_w
//
2
,
height
//
2
-
src_h
//
2
))
return
res
def
resize
(
self
,
image
:
Union
[
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
],
height
:
int
,
width
:
int
,
resize_mode
:
str
=
"default"
,
# "default", "fill", "crop"
)
->
Union
[
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
]:
"""
Resize image.
Args:
image (`PIL.Image.Image`, `np.ndarray` or `torch.Tensor`):
The image input, can be a PIL image, numpy array or pytorch tensor.
height (`int`):
The height to resize to.
width (`int`):
The width to resize to.
resize_mode (`str`, *optional*, defaults to `default`):
The resize mode to use, can be one of `default` or `fill`. If `default`, will resize the image to fit
within the specified width and height, and it may not maintaining the original aspect ratio. If `fill`,
will resize the image to fit within the specified width and height, maintaining the aspect ratio, and
then center the image within the dimensions, filling empty with data from image. If `crop`, will resize
the image to fit within the specified width and height, maintaining the aspect ratio, and then center
the image within the dimensions, cropping the excess. Note that resize_mode `fill` and `crop` are only
supported for PIL image input.
Returns:
`PIL.Image.Image`, `np.ndarray` or `torch.Tensor`:
The resized image.
"""
if
resize_mode
!=
"default"
and
not
isinstance
(
image
,
PIL
.
Image
.
Image
):
raise
ValueError
(
f"Only PIL image input is supported for resize_mode
{
resize_mode
}
"
)
if
isinstance
(
image
,
PIL
.
Image
.
Image
):
if
resize_mode
==
"default"
:
image
=
image
.
resize
(
(
width
,
height
),
resample
=
PIL_INTERPOLATION
[
self
.
config
.
resample
],
reducing_gap
=
self
.
config
.
reducing_gap
,
)
elif
resize_mode
==
"fill"
:
image
=
self
.
_resize_and_fill
(
image
,
width
,
height
)
elif
resize_mode
==
"crop"
:
image
=
self
.
_resize_and_crop
(
image
,
width
,
height
)
else
:
raise
ValueError
(
f"resize_mode
{
resize_mode
}
is not supported"
)
elif
isinstance
(
image
,
torch
.
Tensor
):
image
=
torch
.
nn
.
functional
.
interpolate
(
image
,
size
=
(
height
,
width
),
)
elif
isinstance
(
image
,
np
.
ndarray
):
image
=
self
.
numpy_to_pt
(
image
)
image
=
torch
.
nn
.
functional
.
interpolate
(
image
,
size
=
(
height
,
width
),
)
image
=
self
.
pt_to_numpy
(
image
)
return
image
def
binarize
(
self
,
image
:
PIL
.
Image
.
Image
)
->
PIL
.
Image
.
Image
:
"""
Create a mask.
Args:
image (`PIL.Image.Image`):
The image input, should be a PIL image.
Returns:
`PIL.Image.Image`:
The binarized image. Values less than 0.5 are set to 0, values greater than 0.5 are set to 1.
"""
image
[
image
<
0.5
]
=
0
image
[
image
>=
0.5
]
=
1
return
image
def
_denormalize_conditionally
(
self
,
images
:
torch
.
Tensor
,
do_denormalize
:
Optional
[
List
[
bool
]]
=
None
)
->
torch
.
Tensor
:
r"""
Denormalize a batch of images based on a condition list.
Args:
images (`torch.Tensor`):
The input image tensor.
do_denormalize (`Optional[List[bool]`, *optional*, defaults to `None`):
A list of booleans indicating whether to denormalize each image in the batch. If `None`, will use the
value of `do_normalize` in the `VaeImageProcessor` config.
"""
if
do_denormalize
is
None
:
return
self
.
denormalize
(
images
)
if
self
.
config
.
do_normalize
else
images
return
torch
.
stack
(
[
self
.
denormalize
(
images
[
i
])
if
do_denormalize
[
i
]
else
images
[
i
]
for
i
in
range
(
images
.
shape
[
0
])]
)
def
get_default_height_width
(
self
,
image
:
Union
[
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
],
height
:
Optional
[
int
]
=
None
,
width
:
Optional
[
int
]
=
None
,
)
->
Tuple
[
int
,
int
]:
r"""
Returns the height and width of the image, downscaled to the next integer multiple of `vae_scale_factor`.
Args:
image (`Union[PIL.Image.Image, np.ndarray, torch.Tensor]`):
The image input, which can be a PIL image, NumPy array, or PyTorch tensor. If it is a NumPy array, it
should have shape `[batch, height, width]` or `[batch, height, width, channels]`. If it is a PyTorch
tensor, it should have shape `[batch, channels, height, width]`.
height (`Optional[int]`, *optional*, defaults to `None`):
The height of the preprocessed image. If `None`, the height of the `image` input will be used.
width (`Optional[int]`, *optional*, defaults to `None`):
The width of the preprocessed image. If `None`, the width of the `image` input will be used.
Returns:
`Tuple[int, int]`:
A tuple containing the height and width, both resized to the nearest integer multiple of
`vae_scale_factor`.
"""
if
height
is
None
:
if
isinstance
(
image
,
PIL
.
Image
.
Image
):
height
=
image
.
height
elif
isinstance
(
image
,
torch
.
Tensor
):
height
=
image
.
shape
[
2
]
else
:
height
=
image
.
shape
[
1
]
if
width
is
None
:
if
isinstance
(
image
,
PIL
.
Image
.
Image
):
width
=
image
.
width
elif
isinstance
(
image
,
torch
.
Tensor
):
width
=
image
.
shape
[
3
]
else
:
width
=
image
.
shape
[
2
]
width
,
height
=
(
x
-
x
%
self
.
config
.
vae_scale_factor
for
x
in
(
width
,
height
)
)
# resize to integer multiple of vae_scale_factor
return
height
,
width
def
preprocess
(
self
,
image
:
PipelineImageInput
,
height
:
Optional
[
int
]
=
None
,
width
:
Optional
[
int
]
=
None
,
resize_mode
:
str
=
"default"
,
# "default", "fill", "crop"
crops_coords
:
Optional
[
Tuple
[
int
,
int
,
int
,
int
]]
=
None
,
)
->
torch
.
Tensor
:
"""
Preprocess the image input.
Args:
image (`PipelineImageInput`):
The image input, accepted formats are PIL images, NumPy arrays, PyTorch tensors; Also accept list of
supported formats.
height (`int`, *optional*):
The height in preprocessed image. If `None`, will use the `get_default_height_width()` to get default
height.
width (`int`, *optional*):
The width in preprocessed. If `None`, will use get_default_height_width()` to get the default width.
resize_mode (`str`, *optional*, defaults to `default`):
The resize mode, can be one of `default` or `fill`. If `default`, will resize the image to fit within
the specified width and height, and it may not maintaining the original aspect ratio. If `fill`, will
resize the image to fit within the specified width and height, maintaining the aspect ratio, and then
center the image within the dimensions, filling empty with data from image. If `crop`, will resize the
image to fit within the specified width and height, maintaining the aspect ratio, and then center the
image within the dimensions, cropping the excess. Note that resize_mode `fill` and `crop` are only
supported for PIL image input.
crops_coords (`List[Tuple[int, int, int, int]]`, *optional*, defaults to `None`):
The crop coordinates for each image in the batch. If `None`, will not crop the image.
Returns:
`torch.Tensor`:
The preprocessed image.
"""
supported_formats
=
(
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
)
# Expand the missing dimension for 3-dimensional pytorch tensor or numpy array that represents grayscale image
if
self
.
config
.
do_convert_grayscale
and
isinstance
(
image
, (
torch
.
Tensor
,
np
.
ndarray
))
and
image
.
ndim
==
3
:
if
isinstance
(
image
,
torch
.
Tensor
):
# if image is a pytorch tensor could have 2 possible shapes:
# 1. batch x height x width: we should insert the channel dimension at position 1
# 2. channel x height x width: we should insert batch dimension at position 0,
# however, since both channel and batch dimension has same size 1, it is same to insert at position 1
# for simplicity, we insert a dimension of size 1 at position 1 for both cases
image
=
image
.
unsqueeze
(
1
)
else
:
# if it is a numpy array, it could have 2 possible shapes:
# 1. batch x height x width: insert channel dimension on last position
# 2. height x width x channel: insert batch dimension on first position
if
image
.
shape
[
-
1
]
==
1
:
image
=
np
.
expand_dims
(
image
,
axis
=
0
)
else
:
image
=
np
.
expand_dims
(
image
,
axis
=
-
1
)
if
isinstance
(
image
,
list
)
and
isinstance
(
image
[
0
],
np
.
ndarray
)
and
image
[
0
].
ndim
==
4
:
warnings
.
warn
(
"Passing `image` as a list of 4d np.ndarray is deprecated."
"Please concatenate the list along the batch dimension and pass it as a single 4d np.ndarray"
,
FutureWarning
,
)
image
=
np
.
concatenate
(
image
,
axis
=
0
)
if
isinstance
(
image
,
list
)
and
isinstance
(
image
[
0
],
torch
.
Tensor
)
and
image
[
0
].
ndim
==
4
:
warnings
.
warn
(
"Passing `image` as a list of 4d torch.Tensor is deprecated."
"Please concatenate the list along the batch dimension and pass it as a single 4d torch.Tensor"
,
FutureWarning
,
)
image
=
torch
.
cat
(
image
,
axis
=
0
)
if
not
is_valid_image_imagelist
(
image
):
raise
ValueError
(
f"Input is in incorrect format. Currently, we only support
{
', '
.
join
(
str
(
x
)
for
x
in
supported_formats
)
}
"
)
if
not
isinstance
(
image
,
list
):
image
=
[
image
]
if
isinstance
(
image
[
0
],
PIL
.
Image
.
Image
):
if
crops_coords
is
not
None
:
image
=
[
i
.
crop
(
crops_coords
)
for
i
in
image
]
if
self
.
config
.
do_resize
:
height
,
width
=
self
.
get_default_height_width
(
image
[
0
],
height
,
width
)
image
=
[
self
.
resize
(
i
,
height
,
width
,
resize_mode
=
resize_mode
)
for
i
in
image
]
if
self
.
config
.
do_convert_rgb
:
image
=
[
self
.
convert_to_rgb
(
i
)
for
i
in
image
]
elif
self
.
config
.
do_convert_grayscale
:
image
=
[
self
.
convert_to_grayscale
(
i
)
for
i
in
image
]
image
=
self
.
pil_to_numpy
(
image
)
# to np
image
=
self
.
numpy_to_pt
(
image
)
# to pt
elif
isinstance
(
image
[
0
],
np
.
ndarray
):
image
=
np
.
concatenate
(
image
,
axis
=
0
)
if
image
[
0
].
ndim
==
4
else
np
.
stack
(
image
,
axis
=
0
)
image
=
self
.
numpy_to_pt
(
image
)
height
,
width
=
self
.
get_default_height_width
(
image
,
height
,
width
)
if
self
.
config
.
do_resize
:
image
=
self
.
resize
(
image
,
height
,
width
)
elif
isinstance
(
image
[
0
],
torch
.
Tensor
):
image
=
torch
.
cat
(
image
,
axis
=
0
)
if
image
[
0
].
ndim
==
4
else
torch
.
stack
(
image
,
axis
=
0
)
if
self
.
config
.
do_convert_grayscale
and
image
.
ndim
==
3
:
image
=
image
.
unsqueeze
(
1
)
channel
=
image
.
shape
[
1
]
# don't need any preprocess if the image is latents
if
channel
==
self
.
config
.
vae_latent_channels
:
return
image
height
,
width
=
self
.
get_default_height_width
(
image
,
height
,
width
)
if
self
.
config
.
do_resize
:
image
=
self
.
resize
(
image
,
height
,
width
)
# expected range [0,1], normalize to [-1,1]
do_normalize
=
self
.
config
.
do_normalize
if
do_normalize
and
image
.
min
()
<
0
:
warnings
.
warn
(
"Passing `image` as torch tensor with value range in [-1,1] is deprecated. The expected value range for image tensor is [0,1] "
f"when passing as pytorch tensor or numpy Array. You passed `image` with value range [
{
image
.
min
()
}
,
{
image
.
max
()
}
]"
,
FutureWarning
,
)
do_normalize
=
False
if
do_normalize
:
image
=
self
.
normalize
(
image
)
if
self
.
config
.
do_binarize
:
image
=
self
.
binarize
(
image
)
return
image
def
postprocess
(
self
,
image
:
torch
.
Tensor
,
output_type
:
str
=
"pil"
,
do_denormalize
:
Optional
[
List
[
bool
]]
=
None
,
)
->
Union
[
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
]:
"""
Postprocess the image output from tensor to `output_type`.
Args:
image (`torch.Tensor`):
The image input, should be a pytorch tensor with shape `B x C x H x W`.
output_type (`str`, *optional*, defaults to `pil`):
The output type of the image, can be one of `pil`, `np`, `pt`, `latent`.
do_denormalize (`List[bool]`, *optional*, defaults to `None`):
Whether to denormalize the image to [0,1]. If `None`, will use the value of `do_normalize` in the
`VaeImageProcessor` config.
Returns:
`PIL.Image.Image`, `np.ndarray` or `torch.Tensor`:
The postprocessed image.
"""
if
not
isinstance
(
image
,
torch
.
Tensor
):
raise
ValueError
(
f"Input for postprocessing is in incorrect format:
{
type
(
image
)
}
. We only support pytorch tensor"
)
if
output_type
not
in
[
"latent"
,
"pt"
,
"np"
,
"pil"
]:
deprecation_message
=
(
f"the output_type
{
output_type
}
is outdated and has been set to `np`. Please make sure to set it to one of these instead: "
"`pil`, `np`, `pt`, `latent`"
)
deprecate
(
"Unsupported output_type"
,
"1.0.0"
,
deprecation_message
,
standard_warn
=
False
)
output_type
=
"np"
if
output_type
==
"latent"
:
return
image
image
=
self
.
_denormalize_conditionally
(
image
,
do_denormalize
)
if
output_type
==
"pt"
:
return
image
image
=
self
.
pt_to_numpy
(
image
)
if
output_type
==
"np"
:
return
image
if
output_type
==
"pil"
:
return
self
.
numpy_to_pil
(
image
)
def
apply_overlay
(
self
,
mask
:
PIL
.
Image
.
Image
,
init_image
:
PIL
.
Image
.
Image
,
image
:
PIL
.
Image
.
Image
,
crop_coords
:
Optional
[
Tuple
[
int
,
int
,
int
,
int
]]
=
None
,
)
->
PIL
.
Image
.
Image
:
r"""
Applies an overlay of the mask and the inpainted image on the original image.
Args:
mask (`PIL.Image.Image`):
The mask image that highlights regions to overlay.
init_image (`PIL.Image.Image`):
The original image to which the overlay is applied.
image (`PIL.Image.Image`):
The image to overlay onto the original.
crop_coords (`Tuple[int, int, int, int]`, *optional*):
Coordinates to crop the image. If provided, the image will be cropped accordingly.
Returns:
`PIL.Image.Image`:
The final image with the overlay applied.
"""
width
,
height
=
init_image
.
width
,
init_image
.
height
init_image_masked
=
PIL
.
Image
.
new
(
"RGBa"
, (
width
,
height
))
init_image_masked
.
paste
(
init_image
.
convert
(
"RGBA"
).
convert
(
"RGBa"
),
mask
=
ImageOps
.
invert
(
mask
.
convert
(
"L"
)))
init_image_masked
=
init_image_masked
.
convert
(
"RGBA"
)
if
crop_coords
is
not
None
:
x
,
y
,
x2
,
y2
=
crop_coords
w
=
x2
-
x
h
=
y2
-
y
base_image
=
PIL
.
Image
.
new
(
"RGBA"
, (
width
,
height
))
image
=
self
.
resize
(
image
,
height
=
h
,
width
=
w
,
resize_mode
=
"crop"
)
base_image
.
paste
(
image
, (
x
,
y
))
image
=
base_image
.
convert
(
"RGB"
)
image
=
image
.
convert
(
"RGBA"
)
image
.
alpha_composite
(
init_image_masked
)
image
=
image
.
convert
(
"RGB"
)
return
image
class
VaeImageProcessorLDM3D
(
VaeImageProcessor
):
"""
Image processor for VAE LDM3D.
Args:
do_resize (`bool`, *optional*, defaults to `True`):
Whether to downscale the image's (height, width) dimensions to multiples of `vae_scale_factor`.
vae_scale_factor (`int`, *optional*, defaults to `8`):
VAE scale factor. If `do_resize` is `True`, the image is automatically resized to multiples of this factor.
resample (`str`, *optional*, defaults to `lanczos`):
Resampling filter to use when resizing the image.
do_normalize (`bool`, *optional*, defaults to `True`):
Whether to normalize the image to [-1,1].
"""
config_name
=
CONFIG_NAME
@
register_to_config
def
__init__
(
self
,
do_resize
:
bool
=
True
,
vae_scale_factor
:
int
=
8
,
resample
:
str
=
"lanczos"
,
do_normalize
:
bool
=
True
,
):
super
().
__init__
()
@
staticmethod
def
numpy_to_pil
(
images
:
np
.
ndarray
)
->
List
[
PIL
.
Image
.
Image
]:
r"""
Convert a NumPy image or a batch of images to a list of PIL images.
Args:
images (`np.ndarray`):
The input NumPy array of images, which can be a single image or a batch.
Returns:
`List[PIL.Image.Image]`:
A list of PIL images converted from the input NumPy array.
"""
if
images
.
ndim
==
3
:
images
=
images
[
None
, ...]
images
=
(
images
*
255
).
round
().
astype
(
"uint8"
)
if
images
.
shape
[
-
1
]
==
1
:
# special case for grayscale (single channel) images
pil_images
=
[
Image
.
fromarray
(
image
.
squeeze
(),
mode
=
"L"
)
for
image
in
images
]
else
:
pil_images
=
[
Image
.
fromarray
(
image
[:, :, :
3
])
for
image
in
images
]
return
pil_images
@
staticmethod
def
depth_pil_to_numpy
(
images
:
Union
[
List
[
PIL
.
Image
.
Image
],
PIL
.
Image
.
Image
])
->
np
.
ndarray
:
r"""
Convert a PIL image or a list of PIL images to NumPy arrays.
Args:
images (`Union[List[PIL.Image.Image], PIL.Image.Image]`):
The input image or list of images to be converted.
Returns:
`np.ndarray`:
A NumPy array of the converted images.
"""
if
not
isinstance
(
images
,
list
):
images
=
[
images
]
images
=
[
np
.
array
(
image
).
astype
(
np
.
float32
)
/
(
2
**
16
-
1
)
for
image
in
images
]
images
=
np
.
stack
(
images
,
axis
=
0
)
return
images
@
staticmethod
def
rgblike_to_depthmap
(
image
:
Union
[
np
.
ndarray
,
torch
.
Tensor
])
->
Union
[
np
.
ndarray
,
torch
.
Tensor
]:
r"""
Convert an RGB-like depth image to a depth map.
Args:
image (`Union[np.ndarray, torch.Tensor]`):
The RGB-like depth image to convert.
Returns:
`Union[np.ndarray, torch.Tensor]`:
The corresponding depth map.
"""
return
image
[:, :,
1
]
*
2
**
8
+
image
[:, :,
2
]
def
numpy_to_depth
(
self
,
images
:
np
.
ndarray
)
->
List
[
PIL
.
Image
.
Image
]:
r"""
Convert a NumPy depth image or a batch of images to a list of PIL images.
Args:
images (`np.ndarray`):
The input NumPy array of depth images, which can be a single image or a batch.
Returns:
`List[PIL.Image.Image]`:
A list of PIL images converted from the input NumPy depth images.
"""
if
images
.
ndim
==
3
:
images
=
images
[
None
, ...]
images_depth
=
images
[:, :, :,
3
:]
if
images
.
shape
[
-
1
]
==
6
:
images_depth
=
(
images_depth
*
255
).
round
().
astype
(
"uint8"
)
pil_images
=
[
Image
.
fromarray
(
self
.
rgblike_to_depthmap
(
image_depth
),
mode
=
"I;16"
)
for
image_depth
in
images_depth
]
elif
images
.
shape
[
-
1
]
==
4
:
images_depth
=
(
images_depth
*
65535.0
).
astype
(
np
.
uint16
)
pil_images
=
[
Image
.
fromarray
(
image_depth
,
mode
=
"I;16"
)
for
image_depth
in
images_depth
]
else
:
raise
Exception
(
"Not supported"
)
return
pil_images
def
postprocess
(
self
,
image
:
torch
.
Tensor
,
output_type
:
str
=
"pil"
,
do_denormalize
:
Optional
[
List
[
bool
]]
=
None
,
)
->
Union
[
PIL
.
Image
.
Image
,
np
.
ndarray
,
torch
.
Tensor
]:
"""
Postprocess the image output from tensor to `output_type`.
Args:
image (`torch.Tensor`):
The image input, should be a pytorch tensor with shape `B x C x H x W`.
output_type (`str`, *optional*, defaults to `pil`):
The output type of the image, can be one of `pil`, `np`, `pt`, `latent`.
do_denormalize (`List[bool]`, *optional*, defaults to `None`):
Whether to denormalize the image to [0,1]. If `None`, will use the value of `do_normalize` in the
`VaeImageProcessor` config.
Returns:
`PIL.Image.Image`, `np.ndarray` or `torch.Tensor`:
The postprocessed image.
"""
if
not
isinstance
(
image
,
torch
.
Tensor
):
raise
ValueError
(
f"Input for postprocessing is in incorrect format:
{
type
(
image
)
}
. We only support pytorch tensor"
)
if
output_type
not
in
[
"latent"
,
"pt"
,
"np"
,
"pil"
]:
deprecation_message
=
(
f"the output_type
{
output_type
}
is outdated and has been set to `np`. Please make sure to set it to one of these instead: "
"`pil`, `np`, `pt`, `latent`"
)
deprecate
(
"Unsupported output_type"
,
"1.0.0"
,
deprecation_message
,
standard_warn
=
False
)
output_type
=
"np"
image
=
self
.
_denormalize_conditionally
(
image
,
do_denormalize
)
image
=
self
.
pt_to_numpy
(
image
)
if
output_type
==
"np"
:
if
image
.
shape
[
-
1
]
==
6
:
image_depth
=
np
.
stack
([
self
.
rgblike_to_depthmap
(
im
[:, :,
3
:])
for
im
in
image
],
axis
=
0
)
else
:
image_depth
=
image
[:, :, :,
3
:]
return
image
[:, :, :, :
3
],
image_depth
if
output_type
==
"pil"
:
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