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| -rw-r--r-- | chapters/image.adoc | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/chapters/image.adoc b/chapters/image.adoc index f1b3a92..e8b2917 100644 --- a/chapters/image.adoc +++ b/chapters/image.adoc @@ -11,7 +11,25 @@ ==== RESIZE -Resizes a tensor. Resize is only allowed in the H and W dimensions. In expected use, stride_y is approximately (IH<<shift)/OH and stride_x is approximately (IW<<shift)/OW. OH and OW are also supplied as inputs since there may be off by one errors if calculating OH and OW from the strides. +Resizes a tensor. Resize is only allowed in the H and W dimensions. + +The NEAREST_NEIGHBOR mode returns the value of the input tensor closest to the +calculated sample position for both floating point and integer data formats. + +Floating point BILINEAR mode returns a bilinearly interpolated output value +based on the four closest input sample positions. + +For integer BILINEAR interpolation mode, the output value is calculated by using +the shift value along with the other parameters to create a fixed point scaling +factor for each input. These values are then summed to create the value for +output, which has 2 * shift fractional bits. To convert back to the original +integer size, the output value must be rescaled. + +For floating point stride, stride_y should be set to IH/OH, stride_x should be +set to IW/OW. When using integer stride, stride_y is approximately +(IH<<shift)/OH and stride_x is approximately (IW<<shift)/OW. OH and OW are also +supplied as inputs since there may be off by one errors if calculating OH and OW +from the strides. *Arguments:* |