INPUT APPARATUS AND IMAGE FORMING APPARATUS

摘要

An input apparatus for enabling a user to enter an instruction into a main apparatus has high durability and offers superior operability. The input apparatus includes a table device having a table with a variable size. An image of plural virtual keys that is adapted to the size of the table is projected by a projector unit onto the table. Position information about a finger of the user that is placed on the table is detected by a position detecting device contactlessly. One of the plural virtual keys that corresponds to the position of the finger of the user detected by the position detecting device is detected by a key detecting device based on information about the image of the plural virtual keys and a result of the detection made by the position detecting device.