.. index:: pair: page; InterpolateBackward .. _doxid-dev_guide_op_interpolatebackward: InterpolateBackward =================== General ~~~~~~~ InterpolateBackward computes the gradients of Interpolate operation. Operation attributes ~~~~~~~~~~~~~~~~~~~~ =========================================================================================================================================== ========================================================================================================= ======== =========================================================== ========= Attribute Name De =========================================================================================================================================== ========================================================================================================= ======== =========================================================== ========= :ref:`mode ` Specifies type of interpolation string. ``nearest`` , ``linear`` , ``bilinear`` , ``trilinear`` Required :ref:`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 :ref:`sizes ` Specifies dst shape for spatial axes. s64 A s64 list containing positive values, ``none`` is default Optional :ref:`scales ` Specifies ``scales`` for spatial axes. f32 A f32 list, ``none`` is default Optional :ref:`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 Argu ====== ============= ========= 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 Nam ====== ============= ========= 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 ========= ==== f32 s32 bf16 s32 f16 s32 ========= ====