| 摘要 |
PURPOSE: To optionally and quickly correct a display picture and to improve operability and convenience by correcting the picture based upon a difference between uncorrected picture information and corrected picture information without transferring control right between terminals. CONSTITUTION: A server device 10 is connected among plural client devices 20 through lines L. At the time of receiving plotting information, the device 10 corrects picture information in a picture memory part 13 based upon the plotting information in accordance with the receiving order and delivers difference information obtained by extracting difference between uncorrected picture information and corrected picture information to all the client devices 20. Each of the devices 20 updates picture information displayed on a display part based upon the difference information. |
