finds a geometric transformation that aligns positions specified by pts2 with pts1, returning the alignment error together with the transformation function.


finds geometric transformations that align each of the ptsi with ref.


finds geometric transformations that align each of the ptsi with pts1.

Details and Options

  • FindGeometricTransform returns an expression of the form {err,trfun}, where err is an estimate of the average alignment error, and trfun is a transformation function. The function trfun can be applied to the positions pts2 to align them with the positions pts1.
  • The geometries pts1 and pts2 can be given as lists of position coordinates or Wolfram Language graphics objects.
  • FindGeometricTransform[image1,image2] finds the geometric transformation to align 2D or 3D images.
  • FindGeometricTransform works with points in any dimensions as well as with built-in 2D and 3D graphics primitives.
  • The following options can be specified:
  • MethodAutomaticalignment method to use
    TransformationClassAutomaticgeometrical relation between images
  • By default, the most suitable alignment method and transformation class are used for calculating the transformation.
  • Available fitting methods:
  • "Linear"linear solver based on SVD
    "RANSAC"random sample consensus method
    "FindFit"uses FindFit
    {"ImageAlign",method}ImageAlign transformation using the given method
  • With the setting "RANSAC", some positions may be considered as outliers and may not be used to determine the geometric transformation.
  • Possible settings for the TransformationClass option include:
  • "Translation"translation only
    "Rigid"translation and rotation
    "Similarity"translation, rotation, and scaling
    "Affine"linear transformation and translation
    "Perspective"linear fractional transformation


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Basic Examples  (2)

Determine the spatial transformation between two sets of positions:

Click for copyable input

Find the similarity transformation between two sets of two points:

Click for copyable input

Scope  (6)

Options  (8)

Applications  (3)

Properties & Relations  (2)

See Also

TransformationFunction  GeometricTransformation  ImageAlign  ImageTransformation  ImageCorrespondingPoints

Introduced in 2010
| Updated in 2017