RandomTranslationPerturber

class nrtk.impls.perturb_image.generic.random_translation_perturber.RandomTranslationPerturber(seed: int | Generator | None = 1, color_fill: Sequence[int] | None = [0, 0, 0])

RandomTranslationPerturber randomly translates an image and adjusts bounding boxes accordingly.

Attributes:

rng (numpy.random.Generator):

Random number generator for deterministic behavior.

color_fill (numpy.array):

Background color fill for RGB image.

Methods:

perturb:

Applies a random translation to an input image and adjusts bounding boxes.

__call__:

Calls the perturb method with the given input image.

get_config:

Returns the current configuration of the RandomTranslationPerturber instance.

Methods

from_config	Instantiate a new instance of this class given the configuration JSON-compliant dictionary encapsulating initialization arguments.
get_config	Returns the current configuration of the RandomTranslationPerturber instance.
get_default_config	Generate and return a default configuration dictionary for this class.
get_impls	Discover and return a set of classes that implement the calling class.
get_type_string	Returns the fully qualified type string of the PerturbImage class or its subclass.
is_usable	Check whether this class is available for use.
perturb	Randomly translates an image and adjusts bounding boxes.

__call__(image: ndarray[Any, Any], boxes: Iterable[tuple[AxisAlignedBoundingBox, dict[Hashable, float]]] | None = None, additional_params: dict[str, Any] | None = None) → tuple[ndarray[Any, Any], Iterable[tuple[AxisAlignedBoundingBox, dict[Hashable, float]]] | None]

Calls perturb with the given input image.

__init__(seed: int | Generator | None = 1, color_fill: Sequence[int] | None = [0, 0, 0]) → None

RandomTranslationPerturber applies a random translation perturbation to an input image.

It ensures that bounding boxes are adjusted correctly to reflect the translated image coordinates.

Args:

seed:

Numpy random number generator.

color_fill:

Background color fill for RGB image.

get_config() → dict[str, Any]

Returns the current configuration of the RandomTranslationPerturber instance.

Returns:

return dict[str, Any]:

Configuration dictionary with current settings.

perturb(image: ndarray[Any, Any], boxes: Iterable[tuple[AxisAlignedBoundingBox, dict[Hashable, float]]] | None = None, additional_params: dict[str, Any] | None = None) → tuple[ndarray[Any, Any], Iterable[tuple[AxisAlignedBoundingBox, dict[Hashable, float]]] | None]

Randomly translates an image and adjusts bounding boxes.

Args:

image:

Input image as a numpy array of shape (H, W, C).

boxes:

List of bounding boxes in AxisAlignedBoundingBox format and their corresponding classes.

additional_params:

Dictionary containing:

• “max_translation_limit” (tuple[int, int]): Max translation magnitude

  (translate_h, translate_w) lesser than or equal to the size of the input image.

Returns:

return tuple[np.ndarray, Iterable[tuple[AxisAlignedBoundingBox, dict[Hashable, float]]] | None]:

Translated image with the modified bounding boxes.