# Copyright 2019 Huawei Technologies Co., Ltd
#
# 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
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# 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.
"""
Interpolation Mode, Resampling Filters
"""
from enum import Enum, IntEnum
[docs]class Inter(IntEnum):
"""
Interpolation Modes.
Possible enumeration values are: Inter.NEAREST, Inter.ANTIALIAS, Inter.LINEAR, Inter.BILINEAR, Inter.CUBIC,
Inter.BICUBIC, Inter.AREA, Inter.PILCUBIC.
- Inter.NEAREST: means interpolation method is nearest-neighbor interpolation.
- Inter.ANTIALIAS: means the interpolation method is antialias interpolation.
- Inter.LINEAR: means interpolation method is bilinear interpolation, here is the same as Inter.BILINEAR.
- Inter.BILINEAR: means interpolation method is bilinear interpolation.
- Inter.CUBIC: means the interpolation method is bicubic interpolation, here is the same as Inter.BICUBIC.
- Inter.BICUBIC: means the interpolation method is bicubic interpolation.
- Inter.AREA: means interpolation method is pixel area interpolation.
- Inter.PILCUBIC: means interpolation method is bicubic interpolation like implemented in pillow, input
should be in 3 channels format.
"""
NEAREST = 0
ANTIALIAS = 1
BILINEAR = LINEAR = 2
BICUBIC = CUBIC = 3
AREA = 4
PILCUBIC = 5
[docs]class Border(str, Enum):
"""
Padding Mode, Border Type.
Possible enumeration values are: Border.CONSTANT, Border.EDGE, Border.REFLECT, Border.SYMMETRIC.
- Border.CONSTANT: means it fills the border with constant values.
- Border.EDGE: means it pads with the last value on the edge.
- Border.REFLECT: means it reflects the values on the edge omitting the last value of edge.
- Border.SYMMETRIC: means it reflects the values on the edge repeating the last value of edge.
Note: This class derived from class str to support json serializable.
"""
CONSTANT: str = "constant"
EDGE: str = "edge"
REFLECT: str = "reflect"
SYMMETRIC: str = "symmetric"
class ConvertMode(IntEnum):
"""The color conversion code"""
COLOR_BGR2BGRA = 0
COLOR_RGB2RGBA = COLOR_BGR2BGRA
COLOR_BGRA2BGR = 1
COLOR_RGBA2RGB = COLOR_BGRA2BGR
COLOR_BGR2RGBA = 2
COLOR_RGB2BGRA = COLOR_BGR2RGBA
COLOR_RGBA2BGR = 3
COLOR_BGRA2RGB = COLOR_RGBA2BGR
COLOR_BGR2RGB = 4
COLOR_RGB2BGR = COLOR_BGR2RGB
COLOR_BGRA2RGBA = 5
COLOR_RGBA2BGRA = COLOR_BGRA2RGBA
COLOR_BGR2GRAY = 6
COLOR_RGB2GRAY = 7
COLOR_GRAY2BGR = 8
COLOR_GRAY2RGB = COLOR_GRAY2BGR
COLOR_GRAY2BGRA = 9
COLOR_GRAY2RGBA = COLOR_GRAY2BGRA
COLOR_BGRA2GRAY = 10
COLOR_RGBA2GRAY = 11
[docs]class SliceMode(IntEnum):
"""
Mode to Slice Tensor into multiple parts.
Possible enumeration values are: SliceMode.PAD, SliceMode.DROP.
- SliceMode.PAD: pad some pixels before slice the Tensor if needed.
- SliceMode.DROP: drop remainder pixels before slice the Tensor if needed.
"""
PAD = 0
DROP = 1
class AutoAugmentPolicy(IntEnum):
"""
AutoAugment policy for different datasets.
Possible enumeration values are: AutoAugmentPolicy.IMAGENET, AutoAugmentPolicy.CIFAR10,
AutoAugmentPolicy.SVHN.
Each policy contains 25 pairs of augmentation operations. When using AutoAugment, each image is randomly
transformed with one of these operation pairs. Each pair has 2 different operations. The following shows
all of these augmentation operations, including operation names with their probabilities and random params.
- AutoAugmentPolicy.IMAGENET: dataset auto augment policy for ImageNet.
Augmentation operations pair:
[(("Posterize", 0.4, 8), ("Rotate", 0.6, 9)), (("Solarize", 0.6, 5), ("AutoContrast", 0.6, None)),
(("Equalize", 0.8, None), ("Equalize", 0.6, None)), (("Posterize", 0.6, 7), ("Posterize", 0.6, 6)),
(("Equalize", 0.4, None), ("Solarize", 0.2, 4)), (("Equalize", 0.4, None), ("Rotate", 0.8, 8)),
(("Solarize", 0.6, 3), ("Equalize", 0.6, None)), (("Posterize", 0.8, 5), ("Equalize", 1.0, None)),
(("Rotate", 0.2, 3), ("Solarize", 0.6, 8)), (("Equalize", 0.6, None), ("Posterize", 0.4, 6)),
(("Rotate", 0.8, 8), ("Color", 0.4, 0)), (("Rotate", 0.4, 9), ("Equalize", 0.6, None)),
(("Equalize", 0.0, None), ("Equalize", 0.8, None)), (("Invert", 0.6, None), ("Equalize", 1.0, None)),
(("Color", 0.6, 4), ("Contrast", 1.0, 8)), (("Rotate", 0.8, 8), ("Color", 1.0, 2)),
(("Color", 0.8, 8), ("Solarize", 0.8, 7)), (("Sharpness", 0.4, 7), ("Invert", 0.6, None)),
(("ShearX", 0.6, 5), ("Equalize", 1.0, None)), (("Color", 0.4, 0), ("Equalize", 0.6, None)),
(("Equalize", 0.4, None), ("Solarize", 0.2, 4)), (("Solarize", 0.6, 5), ("AutoContrast", 0.6, None)),
(("Invert", 0.6, None), ("Equalize", 1.0, None)), (("Color", 0.6, 4), ("Contrast", 1.0, 8)),
(("Equalize", 0.8, None), ("Equalize", 0.6, None))]
- AutoAugmentPolicy.CIFAR10: dataset auto augment policy for Cifar10.
Augmentation operations pair:
[(("Invert", 0.1, None), ("Contrast", 0.2, 6)), (("Rotate", 0.7, 2), ("TranslateX", 0.3, 9)),
(("Sharpness", 0.8, 1), ("Sharpness", 0.9, 3)), (("ShearY", 0.5, 8), ("TranslateY", 0.7, 9)),
(("AutoContrast", 0.5, None), ("Equalize", 0.9, None)), (("ShearY", 0.2, 7), ("Posterize", 0.3, 7)),
(("Color", 0.4, 3), ("Brightness", 0.6, 7)), (("Sharpness", 0.3, 9), ("Brightness", 0.7, 9)),
(("Equalize", 0.6, None), ("Equalize", 0.5, None)), (("Contrast", 0.6, 7), ("Sharpness", 0.6, 5)),
(("Color", 0.7, 7), ("TranslateX", 0.5, 8)), (("Equalize", 0.3, None), ("AutoContrast", 0.4, None)),
(("TranslateY", 0.4, 3), ("Sharpness", 0.2, 6)), (("Brightness", 0.9, 6), ("Color", 0.2, 8)),
(("Solarize", 0.5, 2), ("Invert", 0.0, None)), (("Equalize", 0.2, None), ("AutoContrast", 0.6, None)),
(("Equalize", 0.2, None), ("Equalize", 0.6, None)), (("Color", 0.9, 9), ("Equalize", 0.6, None)),
(("AutoContrast", 0.8, None), ("Solarize", 0.2, 8)), (("Brightness", 0.1, 3), ("Color", 0.7, 0)),
(("Solarize", 0.4, 5), ("AutoContrast", 0.9, None)), (("TranslateY", 0.9, 9), ("TranslateY", 0.7, 9)),
(("AutoContrast", 0.9, None), ("Solarize", 0.8, 3)), (("Equalize", 0.8, None), ("Invert", 0.1, None)),
(("TranslateY", 0.7, 9), ("AutoContrast", 0.9, None))]
- AutoAugmentPolicy.SVHN: dataset auto augment policy for SVHN.
Augmentation operations pair:
[(("ShearX", 0.9, 4), ("Invert", 0.2, None)), (("ShearY", 0.9, 8), ("Invert", 0.7, None)),
(("Equalize", 0.6, None), ("Solarize", 0.6, 6)), (("Invert", 0.9, None), ("Equalize", 0.6, None)),
(("Equalize", 0.6, None), ("Rotate", 0.9, 3)), (("ShearX", 0.9, 4), ("AutoContrast", 0.8, None)),
(("ShearY", 0.9, 8), ("Invert", 0.4, None)), (("ShearY", 0.9, 5), ("Solarize", 0.2, 6)),
(("Invert", 0.9, None), ("AutoContrast", 0.8, None)), (("Equalize", 0.6, None), ("Rotate", 0.9, 3)),
(("ShearX", 0.9, 4), ("Solarize", 0.3, 3)), (("ShearY", 0.8, 8), ("Invert", 0.7, None)),
(("Equalize", 0.9, None), ("TranslateY", 0.6, 6)), (("Invert", 0.9, None), ("Equalize", 0.6, None)),
(("Contrast", 0.3, 3), ("Rotate", 0.8, 4)), (("Invert", 0.8, None), ("TranslateY", 0.0, 2)),
(("ShearY", 0.7, 6), ("Solarize", 0.4, 8)), (("Invert", 0.6, None), ("Rotate", 0.8, 4)),
(("ShearY", 0.3, 7), ("TranslateX", 0.9, 3)), (("ShearX", 0.1, 6), ("Invert", 0.6, None)),
(("Solarize", 0.7, 2), ("TranslateY", 0.6, 7)), (("ShearY", 0.8, 4), ("Invert", 0.8, None)),
(("ShearX", 0.7, 9), ("TranslateY", 0.8, 3)), (("ShearY", 0.8, 5), ("AutoContrast", 0.7, None)),
(("ShearX", 0.7, 2), ("Invert", 0.1, None))]
"""
IMAGENET = 0
CIFAR10 = 1
SVHN = 2