@@ -217,6 +217,7 @@ This utility has a number of useful options for controlling the segmentation:
...
@@ -217,6 +217,7 @@ This utility has a number of useful options for controlling the segmentation:
*`--mask`: Provide a B&W image where white indicates the region of the volume to consider for edge detection. Any canny edges in the slices that overlap with the black portion of the mask will be ignored.
*`--mask`: Provide a B&W image where white indicates the region of the volume to consider for edge detection. Any canny edges in the slices that overlap with the black portion of the mask will be ignored.
The output of this process, `canny_raw.ply`, is a dense point set and requires further processing in Meshlab:
The output of this process, `canny_raw.ply`, is a dense point set and requires further processing in Meshlab:
0. Select `View -> Toggle Orthographic Camera` in Meshlab to use the orthographic camera, which removes perspective distortion when viewing the point cloud and makes it easier to select regions manually.
1. Run `Filters/Point Set/Point Cloud Simplification` to reduce the point set to a reasonable size. If the surface is very smooth, use fewer points. Usually, within the order of 10k to 100k points typically retains enough detail while significantly speeding up later steps. Save this point set with the name: `01_simplified.ply`.
1. Run `Filters/Point Set/Point Cloud Simplification` to reduce the point set to a reasonable size. If the surface is very smooth, use fewer points. Usually, within the order of 10k to 100k points typically retains enough detail while significantly speeding up later steps. Save this point set with the name: `01_simplified.ply`.
2. Manually select and delete points that are not on the desired surface.
2. Manually select and delete points that are not on the desired surface.
3. Run `Filters/Selection/Select Outliers` and then delete the selected vertices. This cleans up groups of points that are not on the surface. It is recommended to enable the Preview option while tuning the selection options.
3. Run `Filters/Selection/Select Outliers` and then delete the selected vertices. This cleans up groups of points that are not on the surface. It is recommended to enable the Preview option while tuning the selection options.
