Interpolate#

Interpolate layer performs interpolation on src tensor at spatial dimensions.

Operation Attributes#

Attribute

Name

Description

Value Type
Supported

Values
Required or

Optional

mode

Specifies type of in terpolation

string

nearest, linear, bilinear, trilinear

Required

coordinate_transformation_mode

Specifies how to transform the coordinate in the resized tensor to the coordinate in the original tensor

string

half_pixel (default), align_corners

Optional

sizes

Specifies dst shape for spatial axes.

s64

A s64 list containing positive values, none is default

Optional

scales

Specifies scales for spatial axes.

f32

A f32 list, none is default

Optional

data_format

Controls how to interpret the shape of src and dst

string

NCX, NXC (default)

Optional

@note Either sizes or scales should be provided. When sizes is used, scales will be ignored.

@note The attribute coordinate_transformation_mode is the name of transformation mode in string format. Here scale[x] is dst_shape[x]/src_shape[x] and x_resized is a coordinate in axis x,for any axis x from the src axis.n For half_pixel: the coordinate in the original tensor axis x is calculated as ((x_resized + 0.5) / scale[x]) - 0.5.n For align_corners: the coordinate in the original tensor axis x is calculated as 0 if dst_shape[x] == 1 else x_resized * (src_shape[x] - 1)     / (dst_shape[x] - 1).

Execution Arguments#

The inputs and outputs must be provided according to the below index order when constructing an operation.

Inputs#

Index

Argument Name

Required or Optional

0

src

Required

1

sizes

Optional

@note sizes is a 1D tensor describing output shape for spatial axes. It is a non-differentiable tensor.

Outputs#

Index

Argument Name

Required or Optional

0

dst

Required

@note The shape of the dst matches src shape except spatial dimensions. For spatial dimensions, they should match sizes from sizes or calculated from scales attribute.

Supported Data Types#

Interpolate operation supports the following data type combinations.

Src / Dst

Sizes

f32

s32

bf16

s32

f16

s32