04.3 Extracting an ROI

ExtractingROI This example demonstrates how to use the SbImageDataAccessor to access values of an image.

DESCRIPTION:

It is sometimes necessary to select a Region Of Interest (ROI) inside an image. This allows removing non relevant data or saving computation time during the validation step of a workflow.
• This example shows how to load an image from a file into an SoImageDataAdapter object.
• Then a rectangular region [30, 100]x[30, 100]x[0, 0] pixels is extracted in an SoMemoryDataAdapter.
• The ROI is saved to a file in the current directory.

NOTE:

• This example works with a 2D square area but could be easily extended to extract a cubic volume from a 3D image.
• This example do not use ImageViz engines but could be a step to start working with ImageViz.
• The SoCropImageProcessing can be used to do the same workflow. This example shows how to handle the data in a lower level way.

SEE ALSO

SbImageDataAccessor, SbImageDataAdapterHelper, SoImageDataAdapter, SoCropImageProcessing

FILES:

• ImageViz/GettingStarted/04.3.ExtractingROI.cxx