Contents

InterpolateBackward

General

InterpolateBackward computes the gradients of Interpolate operation.

Operation attributes

Attribute Name

Description

Value Type

Supported Values

Required or Optional

mode

Specifies type of interpolation

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.

For half_pixel : the coordinate in the original tensor axis x is calculated as ((x_resized + 0.5) / scale[x]) - 0.5.

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 below index order when constructing an operation.

Inputs

Index

Argument Name

Required or Optional

0

src

Required

1

diff_dst

Required

2

sizes

Optional

Note

src is original input tensor of Interpolate op.

diff_dst is the gradient tensor with respect to the dst.

sizes is a 1D tensor describing output shape for spatial axes.

Outputs

Index

Argument Name

Required or Optional

0

diff_src

Required

Note

diff_src is the gradient tensor with respect to the src of Interpolate.

Supported data types

InterpolateBackward operation supports the following data type combinations.

Src

Diff_dst

Diff_src

Sizes

f32

f32

f32

s32

bf16

bf16

bf16

s32

f16

f16

f16

s32
Interpolate LayerNorm