| http://www.w3.org/ns/prov#value | - On the other hand, in the patent document 1, there is a problem in that the light intensity of the image in the vertical direction including the person is reduced because the area of the person entering into the projection path is detected and, in the patent document 2, in turn, there is a problem in that, when the person area is extracted and then masked by using various sensors such as, in parti
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