Patent ID: 8159538

Claim:
A monitoring system comprising: a monitoring image pickup apparatus configured to capture and output video data; a filter setting unit configured to store filter setting information for analyzing the video data; a filtering unit configured to determine whether the video data satisfies a filter condition of a filter stored in the filter setting unit and, when the video data satisfies the filter condition, perform filtering in which the number of objects detected from the video data is counted and the result of the counting is output; and a filter calibrating unit configured to perform filter calibration in which at least one virtual filter is arranged with respect to a predetermined filter read from the filter setting unit or a newly set filter, filtering is performed by the filtering unit using the predetermined filter read from the filter setting unit or the newly set filter and the virtual filter, a mode of values obtained as results of the filtering is calculated, and when the mode is determined to be equal to or approximate to a true value to be obtained as the result of the filtering, the true value having been obtained beforehand, the virtual filter is stored in the filter setting unit as a primary filter.