Curtaining Filter
The Curtaining Filter removes the curtaining effect, which is common in FIB-SEM image scans. The filter generally applies deconvolution to produce two 3D images: one containing only the stripes of the curtaining effect and the other containing the filtered image. For more information about this filter, refer to Fitschen et al., 2017.
The filter includes three Stopping Criteria and the corresponding Tolerance or Iterations values, which control the computational time and quality of the filter results:
- In the Iterations mode, the filter stops after the specified number of Iterations.
- With Change Dual, an internal tolerance value is determined. The filter stops iterating once the given Tolerance is reached.
- In Change Result mode, differences in gray values between iterations are examined to define the Tolerance value. This mode requires approximately twice the amount of working memory.
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Know how! We recommend to use the default settings for most cases. |
The given Tolerances are independent of image size.
Increasing the Filter Strength can remove heavy stripes. Decreasing the strength reduces the effect of the curtaining filter.
Click Apply to remove the Curtaining according to the defined settings.
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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 . |
The example below shows the lines that are typical for FIB-SEM gray value images (left), known as Curtaining effect. After applying the Curtaining Filter, these lines are completely removed from the original image, enabling proper image segmentation.
