vis4d.data.transforms.resize

Resize transformation.

Functions

get_resize_shape(original_shape, new_shape)	Get shape for resize, considering keep_ratio and align_long_edge.
resize_image(inputs, shape[, interpolation, ...])	Resize image.
resize_tensor(inputs, shape[, ...])	Resize Tensor.

Classes

GenResizeParameters(*[, in_keys, out_keys, ...])	Generate the parameters for a resize operation.
ResizeBoxes2D(*[, in_keys, out_keys, ...])	Resize list of 2D bounding boxes.
ResizeDepthMaps(*[, in_keys, out_keys, ...])	Resize depth maps.
ResizeImages(*[, in_keys, out_keys, ...])	Resize Images.
ResizeInstanceMasks(*[, in_keys, out_keys, ...])	Resize instance segmentation masks.
ResizeIntrinsics(*[, in_keys, out_keys, ...])	Resize Intrinsics.
ResizeOpticalFlows(*[, in_keys, out_keys, ...])	Resize optical flows.
ResizeParam	Parameters for Resize.
ResizeSegMasks(*[, in_keys, out_keys, ...])	Resize segmentation masks.

class ResizeParam

Parameters for Resize.

class GenResizeParameters(*, in_keys=['images'], out_keys=['transforms.resize', 'input_hw'], sensors=None, same_on_batch=True, **kwargs)

Generate the parameters for a resize operation.

__call__(images)

Compute the parameters and put them in the data dict.

Return type:

tuple[list[ResizeParam], list[tuple[int, int]]]

get_resize_shape(original_shape, new_shape, keep_ratio=True, align_long_edge=False, resize_short_edge=False, allow_overflow=False, fixed_scale=False)

Get shape for resize, considering keep_ratio and align_long_edge.

Parameters:

• original_shape (tuple[int, int]) – Original shape in [H, W].

• new_shape (tuple[int, int]) – New shape in [H, W].

• keep_ratio (bool, optional) – Whether to keep the aspect ratio. Defaults to True.

• align_long_edge (bool, optional) – Whether to align the long edge of the original shape with the long edge of the new shape. Defaults to False.

• resize_short_edge (bool, optional) – Whether to resize according to the short edge. Defaults to False.

• allow_overflow (bool, optional) – Whether to allow overflow. Defaults to False.

• fixed_scale (bool, optional) – Whether to use fixed scale.

Returns:

The new shape in [H, W].

Return type:

tuple[int, int]

class ResizeImages(*, in_keys=['images', 'transforms.resize.target_shape'], out_keys=['images'], sensors=None, same_on_batch=True, **kwargs)

Resize Images.

__call__(images, target_shapes)

Resize an image of dimensions [N, H, W, C].

Parameters:

• image (Tensor) – The image.

• target_shape (tuple[int, int]) – The target shape after resizing.

Returns:

Resized images according to parameters in resize.

Return type:

list[NDArrayF32]

resize_image(inputs, shape, interpolation='bilinear', antialias=False, backend='torch')

Resize image.

Return type:

ndarray[Any, dtype[float32]]

class ResizeBoxes2D(*, in_keys=['boxes2d', 'transforms.resize.scale_factor'], out_keys=['boxes2d'], sensors=None, same_on_batch=True, **kwargs)

Resize list of 2D bounding boxes.

__call__(boxes_list, scale_factors)

Resize 2D bounding boxes.

Parameters:

• boxes_list (list[ndarray[Any, dtype[float32]]]) – (list[NDArrayF32]): The bounding boxes to be resized.

• scale_factors (list[tuple[float, float]]) – scaling factors.

Returns:

Resized bounding boxes according to parameters in

resize.

Return type:

list[NDArrayF32]

class ResizeDepthMaps(*, in_keys=['depth_maps', 'transforms.resize.target_shape', 'transforms.resize.scale_factor'], out_keys=['depth_maps'], sensors=None, same_on_batch=True, **kwargs)

Resize depth maps.

__call__(depth_maps, target_shapes, scale_factors)

Resize depth maps.

Return type:

list[ndarray[Any, dtype[float32]]]

class ResizeOpticalFlows(*, in_keys=['optical_flows', 'transforms.resize.target_shape', 'transforms.resize.scale_factor'], out_keys=['optical_flows'], sensors=None, same_on_batch=True, **kwargs)

Resize optical flows.

__call__(optical_flows, target_shapes, scale_factors)

Resize optical flows.

Return type:

list[ndarray[Any, dtype[float32]]]

class ResizeInstanceMasks(*, in_keys=['instance_masks', 'transforms.resize.target_shape'], out_keys=['instance_masks'], sensors=None, same_on_batch=True, **kwargs)

Resize instance segmentation masks.

__call__(masks_list, target_shapes)

Resize masks.

Return type:

list[ndarray[Any, dtype[float32]]]

class ResizeSegMasks(*, in_keys=['seg_masks', 'transforms.resize.target_shape'], out_keys=['seg_masks'], sensors=None, same_on_batch=True, **kwargs)

Resize segmentation masks.

__call__(masks_list, target_shape_list)

Resize masks.

Return type:

list[ndarray[Any, dtype[float32]]]

class ResizeIntrinsics(*, in_keys=['intrinsics', 'transforms.resize.scale_factor'], out_keys=['intrinsics'], sensors=None, same_on_batch=True, **kwargs)

Resize Intrinsics.

__call__(intrinsics, scale_factors)

Scale camera intrinsics when resizing.

Return type:

list[ndarray[Any, dtype[float32]]]

resize_tensor(inputs, shape, interpolation='bilinear', antialias=False)

Resize Tensor.

Return type:

Tensor