| CPC G06V 20/52 (2022.01) [G06T 7/20 (2013.01); G06V 10/255 (2022.01); G06T 2207/10044 (2013.01)] | 13 Claims |

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1. A processing system comprising:
at least one memory configured to store one or more instructions; and
at least one processor configured to execute the one or more instructions to:
capture an image of a person passing through a first area and generate a person image indicating an appearance of the person;
emit an electromagnetic wave having a wavelength of 30 micrometers or more and 1 meter or less toward the person passing through the first area, and receive a reflected wave;
determine whether the person possesses a pre-designated object based on a feature value appearing in a signal of the received reflected wave without generating a transmission image based on the signal of the received reflected wave; and
register, in a first list, the person image of the person determined to possess the pre-designated object.
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