Hysteresis Thresholding
Hysteresis Thresholding is a method of edge detection between two materials (e.g., a solid and the pore space) that uses two thresholds. This method suppresses weak edges that are not connected to strong edges, thereby detecting edges. Edges with a low threshold that are connected to edges with a high threshold are retained. Low-thresholded edges that are not connected to high-thresholded edges are removed. This process creates three classes:
- Below the Lower Threshold → removed
- Above the Upper Threshold → retained
- Between Lower and Upper Thresholds → retained only if connected to an edge above the Upper Threshold
Define the Materials for the removed and retained sections of the image. Enter a name for the file and folder containing the results in the Result File Name (*.gdr) box at the top of the dialog. Choose a name that fits the current project.
Finally, click Create Segmentation to apply the Hysteresis Thresholding to the image dataset. You can find a description of the results here.
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Know how! You can Save your current settings for this tool as Start-Up Settings . The next time you process an image, these settings will be automatically loaded and filled into the parameter fields. You can also load the Built-In Default Settings available in GeoDict. If you change any settings and want to revert to your saved start-up settings, click the corresponding button to Load the Start-Up Settings . |
