Abstract: There is provided a feedback apparatus for a game, the feedback apparatus comprising at least one electrode for attachment to a user of the feedback apparatus; and a control unit for measuring at least one physiological characteristic of the user via the at least one electrode; for determining whether the at least one electrode has been attached correctly to the user for a predefined electro-stimulation signal level based on the measured at least one physiological characteristic; and for providing an electro-stimulation signal at the predefined level to the user via the at least one electrode in response to an output from the game if it is determined that the at least one electrode has been attached correctly to the user.

Abstract: The present invention relates to an electronic device (117) and a corresponding method for reconstructing a data page from an oversampled detected image of said data page. In order to avoid the necessity of using reference marks for said reconstructing it is provided an extraction unit (118) for extracting an oversampling factor from said oversampled detected image, a determination unit (119) for determining a correction information for a correction of said oversampled detected image with respect to said data page by using said extracted oversampling factor, and a correction unit (120) for correcting said oversampled detected image by using said determined correction information. The present invention relates particularly to an optical holographic device for reading out a data page recorded in a holographic recording medium (106).