Pre-Processing > Highlight Lines
Uses the Frangi filter  to highlight linear-type features in the image. Combine with a threshold afterwards to select certain linear-type features.
- Dark: Highlight dark linear-type features
- Bright: Highlight bright linear-type features
Factor which controls the thickness of the lines that are targeted (Recommended: 1-3)
Factor which controls the strength of the Frangi (line-highlighting) filter (Recommended: 1-3)
- Useful for identifying continuous lines in an image. Image pre-processing is recommended to reduce noise when using this function.
 Frangi, Alejandro F., Wiro J. Niessen, Koen L. Vincken, and Max A. Viergever. “Multiscale vessel enhancement filtering.” In International Conference on Medical Image Computing and Computer-Assisted Intervention, pp. 130-137. Springer Berlin Heidelberg, 1998.
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