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Home < Documentation < 4.2 < Modules < CheckerBoardFilter

For the latest Slicer documentation, visit the 4.6 page.

Introduction and Acknowledgements

This work is part of the National Alliance for Medical Image Computing (NA-MIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149. Information on NA-MIC can be obtained from the NA-MIC website.
Author: Jim Miller, GE
Contact: Jim Miller


Module Description

Create a checkerboard volume of two volumes. The output volume will show the two inputs alternating according to the user supplied checkerPattern. This filter is often used to compare the results of image registration. Note that the second input is resampled to the same origin, spacing and direction before it is composed with the first input. The scalar type of the output volume will be the same as the input image scalar type.

Use Cases

Most frequently used for these scenarios:

  • Compare results of registration.



Panels and their use


  • CheckerBoard Parameters
    • Checker Pattern: The pattern of input 1 and input 2 in the output image. The user can specify the number of checkers in each dimension. A checkerPattern of 2,2,1 means that images will alternate in every other checker in the first two dimensions. The same pattern will be used in the 3rd dimension.
  • IO
    • Input Volume 1: First Input volume
    • Input Volume 2: Second Input volume
    • Output Volume: Output filtered

Similar Modules

Checkerboarding in one of family techniques for comparing images that overlap spatially. Slicer's ability to blend foreground, background, and label images provides an alternative means of comparing overlapping images using alpha blending. Yet another blending technique uses complimentary colormaps that color each layer differently (for example with a red or cyan hue) such that when blended using "addition", pixels will be grayscale if the layers have the same value.



Information for Developers