Multi Modal Transfer Functions

This is a tool for defining transfer functions and weights for two to three modalities, e.g. from Talbot-Lau Grating Interferometer X-Ray Computed Tomography. The datasets need to be pre-registered and of the exact same dimensions. A more detailed description and a test dataset will follow shortly.

Example

Basically you can load any data in open_iA but please find below also a link to demo datasets of open_iA, which includes also datasets for the TripleHistogramTransferFunction with ABS, DFC and DPC Contrasts to show its functionality test datasets.

First load the absorption contrast dataset (i.e., Cutout_CFRP_ABS.mhd) into open_iA (using File->Open). In the Data Modalities window you will see the loaded dataset (if not available, right-click on the gray vertical bar of a visible window and select “Data”).

Then, in the Data Modalities, click on the + Button to load the second dataset (i.e.,Cutout_CFRP_DPC.mhd). After that, proceed the same way with the third dataset (i.e., Cutout_CFRP_DFC.mhd) dataset by clicking on +.

Now go to Tools->MultiModal- /MultiChannel Images->Triple Histogram Transfer Function to open the TripleHistogramTransferFunctionWidget. It will show up as separated window. You can now modify the transfer functions of each modality by placing transfer function points and editing their color. You can also modify the window layout to your needs.

Publications:

• L. da Cunha Melo, B. Fröhler, J. Weissenböck, J. Kastner, C. Heinzl, Multimodal Transfer Functions for Talbot-Lau Grating Interferometry Data, International Symposium on Digital Industrial Radiology and Computed Tomography, 2019, Fürth, Germany.
• B. Fröhler, L. da Cunha Melo, J. Weissenböck, J. Kastner, T. Möller, H.-C. Hege, E. Gröller, J. Sanctorum, J. De Beenhouwer, J. Sijbers, and C. Heinzl, Tools for the Analysis of Datasets from X-Ray Computed Tomography based on Talbot-Lau Grating Interferometry, 9th International Conference on Industrial Computed Tomography, 2019, Padua, Italy.

See also the Multi Modal Transfer Functions module code.

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