System and method of performing security inspection of human body based on millimeter-wave

A system of performing security inspection of human body based on millimeter-wave, comprising:

• a millimeter-wave human body security inspection instrument, wherein the millimeter-wave human body security inspection instrument defines an inspection channel, and is configured to scan a person to be inspected standing at a designated standing position within the inspection channel, so as to acquire millimeter-wave scanning data of the person to be inspected;
• a first display device disposed at a position which is viewable by the person to be inspected before the person to be inspected enters the inspection channel, wherein the first display device is configured to display information related to a designated posture, which is expected to be taken by the person to be inspected when the scanning the person to be inspected with the millimeter-wave human body security inspection instrument;
• and
• a workstation configured to perform a reconstruction of millimeter-wave scanning image of the person to be inspected, a confirmation for a standing posture of the person to be inspected and a recognition of a suspected item of the person to be inspected based on the millimeter-wave scanning data,
• wherein the millimeter-wave human body security inspection instrument comprises:
• a first millimeter-wave scanning unit and a second millimeter-wave scanning unit on opposite sides of the inspection channel in a horizontal direction perpendicular to a direction of the person to be inspected passing through the inspection channel, wherein the first millimeter-wave scanning unit and the second millimeter-wave scanning unit are configured to perform millimeter-wave scanning on a front of the person to be inspected and a back of the person to be inspected standing at the designated standing position in the standing posture complying with the designated posture, respectively, so as to obtain a first scanning dataset related to the front of the person to be inspected and a second scanning dataset related to the back of the person to be inspected, and wherein a column direction of the first scanning dataset and a column direction of the second scanning dataset are identical to a height direction of the person to be inspected, and
• wherein the workstation is further configured to:
• combine, in a row direction of the first scanning dataset, columns of the first scanning dataset to obtain a column of first combined data represented by Y1, and combine, in a row direction of the second scanning dataset, columns of the second scanning dataset to obtain a column of second combined data represented by Y2;
• perform a cross-correlation operation on the first combined data Y1 and the second combined data Y2 according to an equation:
• R(τ)=∫Y1(t)Y2(t+τ)dt
• where t is a height corresponding to the first combined data Y1 or the second combined data Y2;
• and
• determine a value of τ corresponding to a maximum of R(τ) as a height difference between the first scanning dataset and the second scanning dataset, and perform a registration between the first scanning dataset and the second scanning dataset based on the height difference, so as to perform the reconstruction of millimeter-wave scanning image of the person to be inspected.