thank you for your answer my images are named 1.jpg 2.jpg 3.jpg ......... So what should I write in place of File%03d.jpg ?? -- View this message in context: http://itk-users.7.n7.nabble.com/3D-Reconstruction-from-2D-slices-tp29848p29860.html Sent from the ITK - Users mailing list archive at Nabble.com.