| 摘要 |
According to the present invention, it is designed in such manner that a designation minimum unit for designating a position of an effective region of an image transmitted from a camera and a designation minimum unit for designating a size of the effective region are set independently from each other so that a restriction on one of them is not extended or applied to the other. Apart from designation minimum units (C, D) for determining the extent of an image region to be transmitted (effective region), designation minimum units (I, J) for determining position of the effective region are set to values irrelevant to the designation minimum units for determining the extent of the effective region. As a result, even when there is a restriction on the setting of one of the designation minimum units, i.e. either the designation minimum unit for designating the position of the effective region or the designation minimum unit for designating the size of the effective region, it can be set in such manner that the restriction applied to one of them is not extended or applied to the other.
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