A feeding device includes: a supply unit that supplies air to a space between a plurality of loaded media to float the media; a feeding unit that feeds out the media floated by the supply unit; and a detection unit that detects whether or not a medium bundle is present among the plurality of media in a state of being floated by the supply unit.

An image processing system includes a processor configured to: respectively obtain provisional positions of edges on both sides of a document in a main scanning direction from a preset reference position, from image information obtained by scanning a first surface of the document; respectively obtain provisional positions of edges on both sides of the document in the main scanning direction from the reference position, from image information obtained by scanning a second surface of the document; and respectively compare the provisional positions of the corresponding edges of the document in the main scanning direction and determine that there is an erroneous detection in the provisional positions of the edges in a case where the provisional positions of the corresponding edges are different from each other.