Transform Method of the ImageDocument Object

This method transforms the current ImageDocument. Among available transformations are inversion of colors, mirroring and rotation by 90, 180 and 270 degrees.

Important! All blocks must be removed from page layout before this method call. Call the ILayoutBlocks::DeleteAll method for each of the ILayout::Blocks, ILayout::BlackSeparators, ILayout::VisualBlocks collections of the corresponding layout.



HRESULT Transform(
  RotationTypeEnum Rotation,
  VARIANT_BOOL     Mirror,
  VARIANT_BOOL     Invert


void Transform(
  RotationTypeEnum Rotation,
  bool             Mirror,
  bool             Invert

Visual Basic .NET

Sub Transform( _
  Rotation As RotationTypeEnum, _
  Mirror As Boolean, _
  Invert As Boolean _


[in] This variable of the RotationTypeEnum type defines the angle of rotation for the image.
[in] This parameter specifies whether the image should be mirrored around the vertical axis during transformation.
[in] This parameter specifies if image colors should be inverted during transformation.

Return values

This method has no specific return values. It returns the standard return values of ABBYY FineReader Engine functions.


  • This method applies transformations to the black-and-white, gray, and color image planes of the ImageDocument. All the other pages are deleted from the ImageDocument. They will be created upon demand.
  • The sequence of geometrical transformations is as follows: first the rotation by the specified angle is performed, and then the image is mirrored around the vertical axis.
  • This method reports events to the listeners attached to the IConnectionPointContainer interface of the ImageDocument object.

See also



24.03.2023 8:51:52

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