Abstract: The present invention provides an image processing apparatus which improves processing efficiency by allowing display of a message according to a usage status of a user and also has good operability. The image processing apparatus includes a setting section 9a for setting a display form of a message 13c. The user sets a display form, that is, display or nondisplay, display time, a color of a display pane, a shape of the display and a display position of the message 13c, to be more precise, from a setting screen capable of setting each kind of message 13c. In the case where “Nondisplay” is selected in selecting display or nondisplay of the message 13c, no setting thereafter is performed. In the case where “Display” is selected, the setting is performed as to all the items, such as the display time, color of the display pane, shape of the display and display position.

Abstract: An image reading device has a movable platen glass that is rotatably supported, that is substantially a prism having a plurality of read faces, and that is constructed so that rotation of the platen glass can switchably place one of the read faces in the read position. Therefore, even if the platen glass becomes stained, the image reading device makes it possible to start or continue reading document images without requiring labor and time for cleaning the platen glass.

Abstract: At forming an image only on one side of a sheet, an image forming unit is controlled by a control unit to form a back-side pattern image on the back side of the sheet. At forming images on both sides of sheets, when a blank side where no image is formed exists, similarly, the back-side pattern image is formed on the blank side. In single-sided printing, a back-side pattern image is formed on the back side of the sheet. In double-sided printing, a predetermined image is formed on a blank page and thus no blank page occurs. It is therefore possible to prevent the back side of a sheet on which an important document is printed from being used for other purpose, and consequently security is enhanced.

Abstract: The present invention provides an image processing apparatus which improves processing efficiency by allowing display of a message according to a usage status of a user and also has good operability. The image processing apparatus includes a setting section 9a for setting a display form of a message 13c. The user sets a display form, that is, display or nondisplay, display time, a color of a display pane, a shape of the display and a display position of the message 13c, to be more precise, from a setting screen capable of setting each kind of message 13c. In the case where “Nondisplay” is selected in selecting display or nondisplay of the message 13c, no setting thereafter is performed. In the case where “Display” is selected, the setting is performed as to all the items, such as the display time, color of the display pane, shape of the display and display position.

Abstract: A transmitting apparatus transmits encrypted image data created by encrypting image data by using an authentication code as an encryption key and the first converted information created by digesting the authentication code by using a one-way function to an image recording apparatus. The image recording apparatus creates the second converted information by digesting an authentication code received directly from the user by using a one-way function, decrypts the received encrypted image data into image data by using the received authentication code as a decryption key if the created second converted information and the received first converted information coincide, and creates and records an image based on the decrypted image data.

Abstract: At forming an image only on one side of a sheet, an image forming unit is controlled by a control unit to form a back-side pattern image on the back side of the sheet. At forming images on both sides of sheets, when a blank side where no image is formed exists, similarly, the back-side pattern image is formed on the blank side. In single-sided printing, a back-side pattern image is formed on the back side of the sheet. In double-sided printing, a predetermined image is formed on a blank page and thus no blank page occurs. It is therefore possible to prevent the back side of a sheet on which an important document is printed from being used for other purpose, and consequently security is enhanced.

Abstract: An image reading device has a movable platen glass that is rotatably supported, that is substantially a prism having a plurality of read faces, and that is constructed so that rotation of the platen glass can switchably place one of the read faces in the read position. Therefore, even if the platen glass becomes stained, the image reading device makes it possible to start or continue reading document images without requiring labor and time for cleaning the platen glass.