Patent ID: 7733529
Filing Date: 2010-06-08
Classification: H04N

Abstract:
1. An electronic blackboard comprising: a writing surface; an optical reader for optically reading an image written on the writing surface and for outputting the read image as image data; a printer; a connecter for removably connecting an external storage medium; an input device operable by an operator to input a copy instruction to instruct the optical reader to read the image on the writing surface, and a density control instruction for starting a density controlling process for causing a density of the image data of the read image to be darker; an image controller for executing the density controlling process on the image data of the read image; a memory for temporarily storing the image data outputted from the optical reader; and a controller; wherein the controller, in response to the copy instruction: wherein the controller, in response to the density control instruction being input after the control performed in response to the copy instruction: wherein the controller counts a number of times the density controlling process has been executed in accordance with the density control instruction for the image data of one image read by the optical reader; and the controller does not permit the density controlling process to be executed more than a predetermined number of times.