| 摘要 |
PURPOSE:To surely and easily visibly monitor visitors with simple constitution by obtaining the difference between the images when there are no visitors and when there is a visitor, finding a centroid position from the differential output thereof and macrodisplaying this position to a specific size. CONSTITUTION:The image in the state of having no visitors is previously stored as a reference image into a reference image memory 23. The difference between the present image and the reference image is obtd. by a differentiating means 24 when the visitor appears. The position of the centroid G of the visitor is detected from the differential image by a means 26 for detecting the centroid position. The reading out control signals for bringing the position of the centroid G to the center of the screen and macrodisplaying the neighborhood of the centroid position over the entire part of the screen by the position information of this centroid G is outputted to a present image memory 22 by a reading out control means 28. The visitor is macrodisplayed on the screen of a monitor 27 and, therefore, the visitor is surely and easily visibly monitored with the simple constitution. |
