fliptform

Flip input and output roles of spatial transformation structure

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Syntax

tflip = fliptform(T)

Description

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tflip = fliptform(T) creates a new TFORM spatial transformation structure by flipping the roles of the inputs and outputs in an existing TFORM structure.

Examples

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Create a spatial transformation structure.

T = maketform('affine', [.5 0 0; .5 2 0; 0 0 1])

T = 

  struct with fields:

       ndims_in: 2
      ndims_out: 2
    forward_fcn: @fwd_affine
    inverse_fcn: @inv_affine
          tdata: [1×1 struct]

Create a new spatial transformation structure by flipping the roles of the inputs and outputs.

T2 = fliptform(T)
T2 = 

  struct with fields:

       ndims_in: 2
      ndims_out: 2
    forward_fcn: @inv_affine
    inverse_fcn: @fwd_affine
          tdata: [1×1 struct]

After flipping the spatial transformation structures, the following statements are equivalent.

x = tformfwd([-3 7],T)
x = tforminv([-3 7],T2)
x =

     2    14


x =

     2    14

Input Arguments

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Spatial transformation, specified as a TFORM spatial transformation structure.

Data Types: struct

Output Arguments

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Flipped spatial transformation, returned as a TFORM spatial transformation structure.

See Also

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Introduced before R2006a

Image Processing Toolbox Documentation

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