Skip to content

Processing

AutoPadding

Bases: Processing, ABC

Source code in V3_5/src/super_gradients/training/processing/processing.py
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
class AutoPadding(Processing, ABC):
    def __init__(self, shape_multiple: Tuple[int, int], pad_value: int):
        """
        :param shape_multiple:  Tuple of (H, W) indicating the height and width multiples to which the input image dimensions will be padded.
                                For instance, with a value of (32, 40), an input image of size (45, 67) will be padded to (64, 80).
        :param pad_value:       Value to pad the image with.
        """
        self.shape_multiple = shape_multiple
        self.pad_value = pad_value

    def get_equivalent_photometric_module(self) -> Optional[nn.Module]:
        return None

    @property
    def resizes_image(self) -> bool:
        # This implementation only pads the image, doesn't resize it.
        return False

__init__(shape_multiple, pad_value)

Parameters:

Name Type Description Default
shape_multiple Tuple[int, int]

Tuple of (H, W) indicating the height and width multiples to which the input image dimensions will be padded. For instance, with a value of (32, 40), an input image of size (45, 67) will be padded to (64, 80).

required
pad_value int

Value to pad the image with.

required
Source code in V3_5/src/super_gradients/training/processing/processing.py
 98
 99
100
101
102
103
104
105
def __init__(self, shape_multiple: Tuple[int, int], pad_value: int):
    """
    :param shape_multiple:  Tuple of (H, W) indicating the height and width multiples to which the input image dimensions will be padded.
                            For instance, with a value of (32, 40), an input image of size (45, 67) will be padded to (64, 80).
    :param pad_value:       Value to pad the image with.
    """
    self.shape_multiple = shape_multiple
    self.pad_value = pad_value

CenterCrop

Bases: ClassificationProcess

Parameters:

Name Type Description Default
size int

Desired output size of the crop.

224
Source code in V3_5/src/super_gradients/training/processing/processing.py
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
@register_processing(Processings.CenterCrop)
class CenterCrop(ClassificationProcess):
    """
    :param size: Desired output size of the crop.
    """

    def __init__(self, size: int = 224):
        super().__init__()
        self.size = int(size)

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
        """Crops the given image at the center.

        :param image: Image, in (H, W, C) format.
        :return:      The center cropped image.
        """
        height, width = image.shape[0], image.shape[1]

        # Calculate the start and end coordinates of the crop.
        start_x = (width - self.size) // 2
        start_y = (height - self.size) // 2
        end_x = start_x + self.size
        end_y = start_y + self.size

        cropped_image = image[start_y:end_y, start_x:end_x]
        return cropped_image, None

    def get_equivalent_photometric_module(self) -> Optional[nn.Module]:
        return None

    def infer_image_input_shape(self) -> Optional[Tuple[int, int]]:
        """
        Infer the output image shape from the processing.

        :return: (rows, cols) Returns the last known output shape for all the processings.
        """
        return (self.size, self.size)

    @property
    def resizes_image(self) -> bool:
        return True

infer_image_input_shape()

Infer the output image shape from the processing.

Returns:

Type Description
Optional[Tuple[int, int]]

(rows, cols) Returns the last known output shape for all the processings.

Source code in V3_5/src/super_gradients/training/processing/processing.py
658
659
660
661
662
663
664
def infer_image_input_shape(self) -> Optional[Tuple[int, int]]:
    """
    Infer the output image shape from the processing.

    :return: (rows, cols) Returns the last known output shape for all the processings.
    """
    return (self.size, self.size)

preprocess_image(image)

Crops the given image at the center.

Parameters:

Name Type Description Default
image np.ndarray

Image, in (H, W, C) format.

required

Returns:

Type Description
Tuple[np.ndarray, None]

The center cropped image.

Source code in V3_5/src/super_gradients/training/processing/processing.py
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
    """Crops the given image at the center.

    :param image: Image, in (H, W, C) format.
    :return:      The center cropped image.
    """
    height, width = image.shape[0], image.shape[1]

    # Calculate the start and end coordinates of the crop.
    start_x = (width - self.size) // 2
    start_y = (height - self.size) // 2
    end_x = start_x + self.size
    end_y = start_y + self.size

    cropped_image = image[start_y:end_y, start_x:end_x]
    return cropped_image, None

ComposeProcessing

Bases: Processing

Compose a list of Processing objects into a single Processing object.

Source code in V3_5/src/super_gradients/training/processing/processing.py
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
@register_processing(Processings.ComposeProcessing)
class ComposeProcessing(Processing):
    """Compose a list of Processing objects into a single Processing object."""

    def __init__(self, processings: List[Processing]):
        """
        :param processings:     List of Processing objects to compose.
        """
        self.processings = processings

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, ComposeProcessingMetadata]:
        """Processing an image, before feeding it to the network."""
        processed_image, metadata_lst = image.copy(), []
        for processing in self.processings:
            processed_image, metadata = processing.preprocess_image(image=processed_image)
            metadata_lst.append(metadata)
        return processed_image, ComposeProcessingMetadata(metadata_lst=metadata_lst)

    def postprocess_predictions(self, predictions: Prediction, metadata: ComposeProcessingMetadata) -> Prediction:
        """Postprocess the model output predictions."""
        postprocessed_predictions = predictions
        for processing, metadata in zip(self.processings[::-1], metadata.metadata_lst[::-1]):
            postprocessed_predictions = processing.postprocess_predictions(postprocessed_predictions, metadata)
        return postprocessed_predictions

    def get_equivalent_photometric_module(self) -> nn.Module:
        modules = []
        for p in self.processings:
            module = p.get_equivalent_photometric_module()
            if module is not None and not isinstance(module, nn.Identity):
                modules.append(module)

        return nn.Sequential(*modules)

    def infer_image_input_shape(self) -> Optional[Tuple[int, int]]:
        """
        Infer the output image shape from the processing.

        :return: (rows, cols) Returns the last known output shape for all the processings.
        """
        output_shape = None
        for p in self.processings:
            new_output_shape = p.infer_image_input_shape()
            if new_output_shape is not None:
                output_shape = new_output_shape

        return output_shape

    @property
    def resizes_image(self) -> bool:
        return any(processing.resizes_image for processing in self.processings)

    def get_equivalent_compose_without_resizing(self, auto_padding: AutoPadding) -> "ComposeProcessing":
        """Get a composed processing equivalent to this one, but without resizing the image.
        :param auto_padding:    AutoPadding object to use for padding the image.
                                This is required since models often expect input image to be a multiple of a specific shape (usually 32x32).
                                This padding operation will be applied on the input image before any other processing.
        :return:                A composed processing equivalent to this one, but without resizing the image.
        """
        processings = [auto_padding]

        for processing in self.processings:
            if isinstance(processing, ComposeProcessing):
                processings.append(processing.get_equivalent_compose_without_resizing(auto_padding=auto_padding))
            elif not processing.resizes_image:
                processings.append(processing)
            else:
                logger.info(f"Skipping processing `{processing.__class__.__name__}` because it resizes the image.")
        return ComposeProcessing(processings)

__init__(processings)

Parameters:

Name Type Description Default
processings List[Processing]

List of Processing objects to compose.

required
Source code in V3_5/src/super_gradients/training/processing/processing.py
120
121
122
123
124
def __init__(self, processings: List[Processing]):
    """
    :param processings:     List of Processing objects to compose.
    """
    self.processings = processings

get_equivalent_compose_without_resizing(auto_padding)

Get a composed processing equivalent to this one, but without resizing the image.

Parameters:

Name Type Description Default
auto_padding AutoPadding

AutoPadding object to use for padding the image. This is required since models often expect input image to be a multiple of a specific shape (usually 32x32). This padding operation will be applied on the input image before any other processing.

required

Returns:

Type Description
ComposeProcessing

A composed processing equivalent to this one, but without resizing the image.

Source code in V3_5/src/super_gradients/training/processing/processing.py
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
def get_equivalent_compose_without_resizing(self, auto_padding: AutoPadding) -> "ComposeProcessing":
    """Get a composed processing equivalent to this one, but without resizing the image.
    :param auto_padding:    AutoPadding object to use for padding the image.
                            This is required since models often expect input image to be a multiple of a specific shape (usually 32x32).
                            This padding operation will be applied on the input image before any other processing.
    :return:                A composed processing equivalent to this one, but without resizing the image.
    """
    processings = [auto_padding]

    for processing in self.processings:
        if isinstance(processing, ComposeProcessing):
            processings.append(processing.get_equivalent_compose_without_resizing(auto_padding=auto_padding))
        elif not processing.resizes_image:
            processings.append(processing)
        else:
            logger.info(f"Skipping processing `{processing.__class__.__name__}` because it resizes the image.")
    return ComposeProcessing(processings)

infer_image_input_shape()

Infer the output image shape from the processing.

Returns:

Type Description
Optional[Tuple[int, int]]

(rows, cols) Returns the last known output shape for all the processings.

Source code in V3_5/src/super_gradients/training/processing/processing.py
150
151
152
153
154
155
156
157
158
159
160
161
162
def infer_image_input_shape(self) -> Optional[Tuple[int, int]]:
    """
    Infer the output image shape from the processing.

    :return: (rows, cols) Returns the last known output shape for all the processings.
    """
    output_shape = None
    for p in self.processings:
        new_output_shape = p.infer_image_input_shape()
        if new_output_shape is not None:
            output_shape = new_output_shape

    return output_shape

postprocess_predictions(predictions, metadata)

Postprocess the model output predictions.

Source code in V3_5/src/super_gradients/training/processing/processing.py
134
135
136
137
138
139
def postprocess_predictions(self, predictions: Prediction, metadata: ComposeProcessingMetadata) -> Prediction:
    """Postprocess the model output predictions."""
    postprocessed_predictions = predictions
    for processing, metadata in zip(self.processings[::-1], metadata.metadata_lst[::-1]):
        postprocessed_predictions = processing.postprocess_predictions(postprocessed_predictions, metadata)
    return postprocessed_predictions

preprocess_image(image)

Processing an image, before feeding it to the network.

Source code in V3_5/src/super_gradients/training/processing/processing.py
126
127
128
129
130
131
132
def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, ComposeProcessingMetadata]:
    """Processing an image, before feeding it to the network."""
    processed_image, metadata_lst = image.copy(), []
    for processing in self.processings:
        processed_image, metadata = processing.preprocess_image(image=processed_image)
        metadata_lst.append(metadata)
    return processed_image, ComposeProcessingMetadata(metadata_lst=metadata_lst)

ImagePermute

Bases: Processing

Permute the image dimensions.

Parameters:

Name Type Description Default
permutation Tuple[int, int, int]

Specify new order of dims. Default value (2, 0, 1) suitable for converting from HWC to CHW format.

(2, 0, 1)
Source code in V3_5/src/super_gradients/training/processing/processing.py
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
@register_processing(Processings.ImagePermute)
class ImagePermute(Processing):
    """Permute the image dimensions.

    :param permutation: Specify new order of dims. Default value (2, 0, 1) suitable for converting from HWC to CHW format.
    """

    def __init__(self, permutation: Tuple[int, int, int] = (2, 0, 1)):
        self.permutation = tuple(permutation)

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
        processed_image = np.ascontiguousarray(image.transpose(*self.permutation))
        return processed_image, None

    def postprocess_predictions(self, predictions: Prediction, metadata: None) -> Prediction:
        return predictions

    def get_equivalent_photometric_module(self) -> Optional[nn.Module]:
        return None

    @property
    def resizes_image(self) -> bool:
        return False

NormalizeImage

Bases: Processing

Normalize an image based on means and standard deviation.

Parameters:

Name Type Description Default
mean List[float]

Mean values for each channel.

required
std List[float]

Standard deviation values for each channel.

required
Source code in V3_5/src/super_gradients/training/processing/processing.py
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
@register_processing(Processings.NormalizeImage)
class NormalizeImage(Processing):
    """Normalize an image based on means and standard deviation.

    :param mean:    Mean values for each channel.
    :param std:     Standard deviation values for each channel.
    """

    def __init__(self, mean: List[float], std: List[float]):
        self.mean = np.array(mean).reshape((1, 1, -1)).astype(np.float32)
        self.std = np.array(std).reshape((1, 1, -1)).astype(np.float32)

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
        return (image - self.mean) / self.std, None

    def postprocess_predictions(self, predictions: Prediction, metadata: None) -> Prediction:
        return predictions

    def get_equivalent_photometric_module(self) -> nn.Module:
        from super_gradients.conversion.preprocessing_modules import ApplyMeanStd

        return ApplyMeanStd(mean=self.mean, std=self.std)

    @property
    def resizes_image(self) -> bool:
        return False

Processing

Bases: ABC

Interface for preprocessing and postprocessing methods that are used to prepare images for a model and process the model's output.

Subclasses should implement the preprocess_image and postprocess_predictions methods according to the specific requirements of the model and task.

Source code in V3_5/src/super_gradients/training/processing/processing.py
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
class Processing(ABC):
    """Interface for preprocessing and postprocessing methods that are
    used to prepare images for a model and process the model's output.

    Subclasses should implement the `preprocess_image` and `postprocess_predictions`
    methods according to the specific requirements of the model and task.
    """

    @abstractmethod
    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, Union[None, ProcessingMetadata]]:
        """Processing an image, before feeding it to the network. Expected to be in (H, W, C) or (H, W)."""
        pass

    @abstractmethod
    def postprocess_predictions(self, predictions: Prediction, metadata: Union[None, ProcessingMetadata]) -> Prediction:
        """Postprocess the model output predictions."""
        pass

    @abstractmethod
    def get_equivalent_photometric_module(self) -> Optional[nn.Module]:
        """
        Get the equivalent photometric preprocessing module for this processing.
        A photometric preprocessing apply a transformation to the image pixels, without changing the image size.
        This includes RGB -> BGR, standardization, normalization etc.
        If a Processing subclass does not have change pixel values, it should return an nn.Identity module.
        If a Processing subclass does not have an equivalent photometric preprocessing, it should return None.
        :return:
        """
        pass

    def infer_image_input_shape(self) -> Optional[Tuple[int, int]]:
        """
        Infer the shape (rows, cols) of the image after all the processing steps.
        This is the effective image size that is fed to model itself
        :return: Return the image shape (rows, cols), or None if the image shape cannot be inferred (When preprocessing
        contains no resize/padding operations).
        """
        return None

    @property
    @abstractmethod
    def resizes_image(self) -> bool:
        """Return True if the processing resizes the image, False otherwise."""
        pass

resizes_image: bool abstractmethod property

Return True if the processing resizes the image, False otherwise.

get_equivalent_photometric_module() abstractmethod

Get the equivalent photometric preprocessing module for this processing. A photometric preprocessing apply a transformation to the image pixels, without changing the image size. This includes RGB -> BGR, standardization, normalization etc. If a Processing subclass does not have change pixel values, it should return an nn.Identity module. If a Processing subclass does not have an equivalent photometric preprocessing, it should return None.

Returns:

Type Description
Optional[nn.Module]
Source code in V3_5/src/super_gradients/training/processing/processing.py
69
70
71
72
73
74
75
76
77
78
79
@abstractmethod
def get_equivalent_photometric_module(self) -> Optional[nn.Module]:
    """
    Get the equivalent photometric preprocessing module for this processing.
    A photometric preprocessing apply a transformation to the image pixels, without changing the image size.
    This includes RGB -> BGR, standardization, normalization etc.
    If a Processing subclass does not have change pixel values, it should return an nn.Identity module.
    If a Processing subclass does not have an equivalent photometric preprocessing, it should return None.
    :return:
    """
    pass

infer_image_input_shape()

Infer the shape (rows, cols) of the image after all the processing steps. This is the effective image size that is fed to model itself

Returns:

Type Description
Optional[Tuple[int, int]]

Return the image shape (rows, cols), or None if the image shape cannot be inferred (When preprocessing contains no resize/padding operations).

Source code in V3_5/src/super_gradients/training/processing/processing.py
81
82
83
84
85
86
87
88
def infer_image_input_shape(self) -> Optional[Tuple[int, int]]:
    """
    Infer the shape (rows, cols) of the image after all the processing steps.
    This is the effective image size that is fed to model itself
    :return: Return the image shape (rows, cols), or None if the image shape cannot be inferred (When preprocessing
    contains no resize/padding operations).
    """
    return None

postprocess_predictions(predictions, metadata) abstractmethod

Postprocess the model output predictions.

Source code in V3_5/src/super_gradients/training/processing/processing.py
64
65
66
67
@abstractmethod
def postprocess_predictions(self, predictions: Prediction, metadata: Union[None, ProcessingMetadata]) -> Prediction:
    """Postprocess the model output predictions."""
    pass

preprocess_image(image) abstractmethod

Processing an image, before feeding it to the network. Expected to be in (H, W, C) or (H, W).

Source code in V3_5/src/super_gradients/training/processing/processing.py
59
60
61
62
@abstractmethod
def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, Union[None, ProcessingMetadata]]:
    """Processing an image, before feeding it to the network. Expected to be in (H, W, C) or (H, W)."""
    pass

ProcessingMetadata dataclass

Bases: ABC

Metadata including information to postprocess a prediction.

Source code in V3_5/src/super_gradients/training/processing/processing.py
29
30
31
@dataclass
class ProcessingMetadata(ABC):
    """Metadata including information to postprocess a prediction."""

Resize

Bases: ClassificationProcess

Source code in V3_5/src/super_gradients/training/processing/processing.py
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
@register_processing(Processings.Resize)
class Resize(ClassificationProcess):
    def __init__(self, size: int = 224):
        super().__init__()
        self.size = int(size)

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
        """Resize an image.

        :param image: Image, in (H, W, C) format.
        :return:      The resized image.
        """
        height, width = image.shape[:2]
        output_shape = self.size, self.size
        scale_factor = max(output_shape[0] / height, output_shape[1] / width)

        if scale_factor != 1.0:
            new_height, new_width = int(height * scale_factor), int(width * scale_factor)
            image = _rescale_image_with_pil(image, target_shape=(new_height, new_width))

        return image, RescaleMetadata(original_shape=(height, width), scale_factor_h=scale_factor, scale_factor_w=scale_factor)

    def get_equivalent_photometric_module(self) -> None:
        return None

    def infer_image_input_shape(self) -> None:
        return None

    @property
    def resizes_image(self) -> bool:
        return True

preprocess_image(image)

Resize an image.

Parameters:

Name Type Description Default
image np.ndarray

Image, in (H, W, C) format.

required

Returns:

Type Description
Tuple[np.ndarray, None]

The resized image.

Source code in V3_5/src/super_gradients/training/processing/processing.py
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
    """Resize an image.

    :param image: Image, in (H, W, C) format.
    :return:      The resized image.
    """
    height, width = image.shape[:2]
    output_shape = self.size, self.size
    scale_factor = max(output_shape[0] / height, output_shape[1] / width)

    if scale_factor != 1.0:
        new_height, new_width = int(height * scale_factor), int(width * scale_factor)
        image = _rescale_image_with_pil(image, target_shape=(new_height, new_width))

    return image, RescaleMetadata(original_shape=(height, width), scale_factor_h=scale_factor, scale_factor_w=scale_factor)

ReverseImageChannels

Bases: Processing

Reverse the order of the image channels (RGB -> BGR or BGR -> RGB).

Source code in V3_5/src/super_gradients/training/processing/processing.py
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
@register_processing(Processings.ReverseImageChannels)
class ReverseImageChannels(Processing):
    """Reverse the order of the image channels (RGB -> BGR or BGR -> RGB)."""

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
        """Reverse the channel order of an image.

        :param image: Image, in (H, W, C) format.
        :return:      Image with reversed channel order. (RGB if input was BGR, BGR if input was RGB)
        """

        if image.shape[2] != 3:
            raise ValueError("ReverseImageChannels expects 3 channels, got: " + str(image.shape[2]))

        processed_image = image[..., ::-1]
        return processed_image, None

    def postprocess_predictions(self, predictions: Prediction, metadata: None) -> Prediction:
        return predictions

    def get_equivalent_photometric_module(self) -> nn.Module:
        from super_gradients.conversion.preprocessing_modules import ChannelSelect

        return ChannelSelect(channels=np.array([2, 1, 0], dtype=int))

    @property
    def resizes_image(self) -> bool:
        return False

preprocess_image(image)

Reverse the channel order of an image.

Parameters:

Name Type Description Default
image np.ndarray

Image, in (H, W, C) format.

required

Returns:

Type Description
Tuple[np.ndarray, None]

Image with reversed channel order. (RGB if input was BGR, BGR if input was RGB)

Source code in V3_5/src/super_gradients/training/processing/processing.py
216
217
218
219
220
221
222
223
224
225
226
227
def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
    """Reverse the channel order of an image.

    :param image: Image, in (H, W, C) format.
    :return:      Image with reversed channel order. (RGB if input was BGR, BGR if input was RGB)
    """

    if image.shape[2] != 3:
        raise ValueError("ReverseImageChannels expects 3 channels, got: " + str(image.shape[2]))

    processed_image = image[..., ::-1]
    return processed_image, None

StandardizeImage

Bases: Processing

Standardize image pixel values with img/max_val

Parameters:

Name Type Description Default
max_value float

Current maximum value of the image pixels. (usually 255)

255.0
Source code in V3_5/src/super_gradients/training/processing/processing.py
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
@register_processing(Processings.StandardizeImage)
class StandardizeImage(Processing):
    """Standardize image pixel values with img/max_val

    :param max_value: Current maximum value of the image pixels. (usually 255)
    """

    def __init__(self, max_value: float = 255.0):
        super().__init__()
        self.max_value = float(max_value)

    def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
        """Reverse the channel order of an image.

        :param image: Image, in (H, W, C) format.
        :return:      Image with reversed channel order. (RGB if input was BGR, BGR if input was RGB)
        """
        processed_image = (image / self.max_value).astype(np.float32)
        return processed_image, None

    def postprocess_predictions(self, predictions: Prediction, metadata: None) -> Prediction:
        return predictions

    def update_mean_std_normalization(self, mean: np.ndarray, std: np.ndarray) -> Tuple[np.ndarray, np.ndarray]:
        mean = mean / self.max_value
        std = std / self.max_value
        return mean, std

    def get_equivalent_photometric_module(self) -> nn.Module:
        from super_gradients.conversion.preprocessing_modules import ApplyMeanStd

        return ApplyMeanStd(mean=np.array([0], dtype=np.float32), std=np.array([self.max_value], dtype=np.float32))

    @property
    def resizes_image(self) -> bool:
        return False

preprocess_image(image)

Reverse the channel order of an image.

Parameters:

Name Type Description Default
image np.ndarray

Image, in (H, W, C) format.

required

Returns:

Type Description
Tuple[np.ndarray, None]

Image with reversed channel order. (RGB if input was BGR, BGR if input was RGB)

Source code in V3_5/src/super_gradients/training/processing/processing.py
253
254
255
256
257
258
259
260
def preprocess_image(self, image: np.ndarray) -> Tuple[np.ndarray, None]:
    """Reverse the channel order of an image.

    :param image: Image, in (H, W, C) format.
    :return:      Image with reversed channel order. (RGB if input was BGR, BGR if input was RGB)
    """
    processed_image = (image / self.max_value).astype(np.float32)
    return processed_image, None

default_dekr_coco_processing_params()

Processing parameters commonly used for training DEKR on COCO dataset.

Source code in V3_5/src/super_gradients/training/processing/processing.py
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
def default_dekr_coco_processing_params() -> dict:
    """Processing parameters commonly used for training DEKR on COCO dataset."""

    image_processor = ComposeProcessing(
        [
            ReverseImageChannels(),
            KeypointsLongestMaxSizeRescale(output_shape=(640, 640)),
            KeypointsBottomRightPadding(output_shape=(640, 640), pad_value=127),
            StandardizeImage(max_value=255.0),
            NormalizeImage(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]),
            ImagePermute(permutation=(2, 0, 1)),
        ]
    )

    edge_links = [
        [0, 1],
        [0, 2],
        [1, 2],
        [1, 3],
        [2, 4],
        [3, 5],
        [4, 6],
        [5, 6],
        [5, 7],
        [5, 11],
        [6, 8],
        [6, 12],
        [7, 9],
        [8, 10],
        [11, 12],
        [11, 13],
        [12, 14],
        [13, 15],
        [14, 16],
    ]

    edge_colors = [
        (214, 39, 40),  # Nose -> LeftEye
        (148, 103, 189),  # Nose -> RightEye
        (44, 160, 44),  # LeftEye -> RightEye
        (140, 86, 75),  # LeftEye -> LeftEar
        (227, 119, 194),  # RightEye -> RightEar
        (127, 127, 127),  # LeftEar -> LeftShoulder
        (188, 189, 34),  # RightEar -> RightShoulder
        (127, 127, 127),  # Shoulders
        (188, 189, 34),  # LeftShoulder -> LeftElbow
        (140, 86, 75),  # LeftTorso
        (23, 190, 207),  # RightShoulder -> RightElbow
        (227, 119, 194),  # RightTorso
        (31, 119, 180),  # LeftElbow -> LeftArm
        (255, 127, 14),  # RightElbow -> RightArm
        (148, 103, 189),  # Waist
        (255, 127, 14),  # Left Hip -> Left Knee
        (214, 39, 40),  # Right Hip -> Right Knee
        (31, 119, 180),  # Left Knee -> Left Ankle
        (44, 160, 44),  # Right Knee -> Right Ankle
    ]

    keypoint_colors = [
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
        (31, 119, 180),
        (148, 103, 189),
    ]
    params = dict(image_processor=image_processor, conf=0.05, edge_links=edge_links, edge_colors=edge_colors, keypoint_colors=keypoint_colors)
    return params

default_imagenet_processing_params()

Processing parameters commonly used for training resnet on Imagenet dataset.

Source code in V3_5/src/super_gradients/training/processing/processing.py
899
900
901
902
903
904
905
906
907
908
def default_imagenet_processing_params() -> dict:
    """Processing parameters commonly used for training resnet on Imagenet dataset."""
    image_processor = ComposeProcessing(
        [Resize(size=256), CenterCrop(size=224), StandardizeImage(), NormalizeImage(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]), ImagePermute()]
    )
    params = dict(
        class_names=IMAGENET_CLASSES,
        image_processor=image_processor,
    )
    return params

default_ppyoloe_coco_processing_params()

Processing parameters commonly used for training PPYoloE on COCO dataset. TODO: remove once we load it from the checkpoint

Source code in V3_5/src/super_gradients/training/processing/processing.py
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
def default_ppyoloe_coco_processing_params() -> dict:
    """Processing parameters commonly used for training PPYoloE on COCO dataset.
    TODO: remove once we load it from the checkpoint
    """

    image_processor = ComposeProcessing(
        [
            ReverseImageChannels(),
            DetectionRescale(output_shape=(640, 640)),
            NormalizeImage(mean=[123.675, 116.28, 103.53], std=[58.395, 57.12, 57.375]),
            ImagePermute(permutation=(2, 0, 1)),
        ]
    )

    params = dict(
        class_names=COCO_DETECTION_CLASSES_LIST,
        image_processor=image_processor,
        iou=0.65,
        conf=0.5,
    )
    return params

default_vit_imagenet_processing_params()

Processing parameters used by ViT for training resnet on Imagenet dataset.

Source code in V3_5/src/super_gradients/training/processing/processing.py
911
912
913
914
915
916
917
918
919
920
def default_vit_imagenet_processing_params() -> dict:
    """Processing parameters used by ViT for training resnet on Imagenet dataset."""
    image_processor = ComposeProcessing(
        [Resize(size=256), CenterCrop(size=224), StandardizeImage(), NormalizeImage(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5]), ImagePermute()]
    )
    params = dict(
        class_names=IMAGENET_CLASSES,
        image_processor=image_processor,
    )
    return params

default_yolo_nas_coco_processing_params()

Processing parameters commonly used for training YoloNAS on COCO dataset. TODO: remove once we load it from the checkpoint

Source code in V3_5/src/super_gradients/training/processing/processing.py
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
def default_yolo_nas_coco_processing_params() -> dict:
    """Processing parameters commonly used for training YoloNAS on COCO dataset.
    TODO: remove once we load it from the checkpoint
    """

    image_processor = ComposeProcessing(
        [
            DetectionLongestMaxSizeRescale(output_shape=(636, 636)),
            DetectionCenterPadding(output_shape=(640, 640), pad_value=114),
            StandardizeImage(max_value=255.0),
            ImagePermute(permutation=(2, 0, 1)),
        ]
    )

    params = dict(
        class_names=COCO_DETECTION_CLASSES_LIST,
        image_processor=image_processor,
        iou=0.7,
        conf=0.25,
    )
    return params

default_yolox_coco_processing_params()

Processing parameters commonly used for training YoloX on COCO dataset. TODO: remove once we load it from the checkpoint

Source code in V3_5/src/super_gradients/training/processing/processing.py
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
def default_yolox_coco_processing_params() -> dict:
    """Processing parameters commonly used for training YoloX on COCO dataset.
    TODO: remove once we load it from the checkpoint
    """

    image_processor = ComposeProcessing(
        [
            ReverseImageChannels(),
            DetectionLongestMaxSizeRescale((640, 640)),
            DetectionBottomRightPadding((640, 640), 114),
            ImagePermute((2, 0, 1)),
        ]
    )

    params = dict(
        class_names=COCO_DETECTION_CLASSES_LIST,
        image_processor=image_processor,
        iou=0.65,
        conf=0.1,
    )
    return params

get_pretrained_processing_params(model_name, pretrained_weights)

Get the processing parameters for a pretrained model. TODO: remove once we load it from the checkpoint

Source code in V3_5/src/super_gradients/training/processing/processing.py
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
def get_pretrained_processing_params(model_name: str, pretrained_weights: str) -> dict:
    """Get the processing parameters for a pretrained model.
    TODO: remove once we load it from the checkpoint
    """
    if pretrained_weights == "coco":
        if "yolox" in model_name:
            return default_yolox_coco_processing_params()
        elif "ppyoloe" in model_name:
            return default_ppyoloe_coco_processing_params()
        elif "yolo_nas" in model_name:
            return default_yolo_nas_coco_processing_params()

    if pretrained_weights == "coco_pose" and model_name in ("dekr_w32_no_dc", "dekr_custom"):
        return default_dekr_coco_processing_params()

    if pretrained_weights == "coco_pose" and model_name.startswith("yolo_nas_pose"):
        return default_yolo_nas_pose_coco_processing_params()

    if pretrained_weights == "imagenet" and model_name in {"vit_base", "vit_large", "vit_huge"}:
        return default_vit_imagenet_processing_params()

    if pretrained_weights == "imagenet":
        return default_imagenet_processing_params()

    return dict()