| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic blackboard which can prevent lack of a writing content while visibility of image data is sufficiently kept when the image data generated by reading a character and a drawing, which are plotted on a writing face, is outputted, and to provide a computer program of the electronic blackboard. <P>SOLUTION: An electronic blackboard includes: a writing face; a detachable section which can detach a storage medium; a reading section which reads information plotted on the writing face and generates multi-gradation image data where respective pixels are expressed in multi-gradation; an image generation section which generates a plurality of pieces of two gradation image data obtained by binarizing the respective pixels included in the multi-gradation image data generated by the reading section with a prescribed threshold on a gradation value by varying the threshold; and an output control section which writes a plurality of pieces of two gradation image data generated by the image generation section in the storage medium installed in the detachable section. <P>COPYRIGHT: (C)2013,JPO&INPIT |
