Function Description

Operator Function

Performs resampling operations on the input tensor. This operator uses two interpolation algorithms: Nearest Neighbor and Linear.

• Formular of Nearest Neighbor:
  dst(n,c,oh,ow) = src(n,c,ih,iw), where:

  • ih = [(oh + 0.5)/F_h − 0.5]
  • iw = [(ow + 0.5)/F_w − 0.5]
• Formular of Linear:
  dst(n,c,oh,ow) = src(n,c,ih₀,iw₀) × (1 – W_ih) × (1 – W_iw) + src(n,c,ih₁,iw₀) × W_ih × (1 – W_iw) + src(n,c,ih₀,iw₁) × (1 – W_ih) × W_iw + src(n,c,ih₁,iw₁) × W_ih × W_iw, where:

  • ih₀=⌊oh+0.5F_h−0.5⌋
  • ih₁=⌈oh+0.5F_h−0.5⌉
  • iw₀=⌊ow+0.5Fw−0.5⌋
  • iw₁=⌈ow+0.5Fw−0.5⌉
  • W_ih=oh+0.5F_h−0.5−ih₀
  • W_iw=ow+0.5F_w−0.5−iw₀

  Table 1 Formula parameters

  Parameter	Description
  src	Input source tensor.
  dst	Target tensor.
  n	Dimension 1 to be sampled.
  c	Dimension 2 to be sampled.
  ih	Input height.
  iw	Input width.
  oh	Output height.
  ow	Output width.