# Segment blob in 3D Viewer

Running the plugin “Plugins - Segmentation - Segment blob in 3D Viewer” will add capabilities to all existing 3D Viewer windows. A new 3D Viewer window opens if none are already open.

Segment blob in 3D Viewer: example of resulting mesh (in green) overlaid on the original image volume (the sample file “bat cochlea volume”).

# Segmenting a blob

Step 2: select the magic wand tool.

Step 3: click on a bright place of an image volume.

A results window will open with surface and volume measurements, and the 3d coordinates of the blob.

# Canceling an ongoing segmentation

Push the Esc key. You may have to do so while having the Fiji toolbar window activated.

# Adjusting parameters of the segmentation

Internally, the Level Sets plugin is used. To adjust its many parameters, do a Shift +click with the magic wand. The dialog will open; it’s the same dialog as shown in the Level Sets documentation page.