| 摘要 |
PROBLEM TO BE SOLVED: To protect privacy in a supervisory area. SOLUTION: A mask table 15 stores areas avoiding viewing, even by a supervisor or other areas or the like, image data in the mask areas stored in the mask table 15 are eliminated from image data of a supervised area photographed by a camera 20 and image data with mask area information denoting the position of the eliminated image data, attached to them are transmitted to a supervisory center 40.
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