An object of the present invention is to generate an image which is prevented from being influenced by a movement while suppressing increase in noise components. The battery module includes multiple prismatic cell cases having short lateral walls and long lateral walls arranged side by side. A library view group image layout unit places a group image corresponding to each of the groups according to the rank order of the groups, along a group image layout reference line provided in a display region. The system generates a signature of the unknown work from each of the segments.