| 摘要 |
PROBLEM TO BE SOLVED: To record changes of a drawing state about an image which is displayed at a display part of an electronic blackboard system in order to know them later.SOLUTION: An electronic blackboard system 10 includes: a display unit 1 which displays image data; an input unit 2 which receives an operation input by a user; a recording unit 3 which records the image data; and a control unit 5 which synthesizes the image data drawn according to the operation input to the input unit 2 into the image data displayed at the display unit 1 for display. The control unit 5 records the image data displayed at the display unit 1 to the recording unit 3 at a prescribed timing. The prescribed timing can be made to be a periodic timing by a time interval which is specified beforehand, or it can be made to be a timing when the operation input to the input unit 2 has been absent for a prescribed time. |
