Physical objects located inside the radio transmission environment affect electromagnetic waves. This means that there is a correlation between them. The work is aimed at studying the influence of a person on the passage of electromagnetic waves in a wireless information transmission environment in order to determine his location. The analyzed parameters are a channel matrix, which includes information on how the signal propagates from the transmitter to the receiver via 9 pairs of antennas and 56 suborthogonal subcarriers. The article proposes an algorithm that interprets information from the channel matrix into a video frame containing the silhouette of the subject. Video frames created by the proposed algorithm provide auxiliary information for a conventional surveillance system in critical situations. In particular, control over the observed territory is carried out without violating confidentiality.