I am importing microct images as image sequence and after using 3d viewer. 3d view is fine but when i am trying to export surfaces as any stl file type whether it is binary or ascii. It is saying no meshes to export. Kindly help me with this
Welcome to the forum, @Kartik_Dixit!
Try switching to Isosurface mode first: Edit Display as Surface.
See also this ImageJ mailing list thread.