Radar apparatus, imaging method, and non-transitory computer-readable medium
A radar signal transmission/reception unit ( 103 ) acquires a radar signal generated by using a plurality of transmission antennas Tx and a plurality of reception antennas Rx. A projection direction/imaging policy control unit ( 107 ) holds an imaging policy. The imaging policy includes a projection direction representing a direction in which an inspection target is viewed, an imaging area indicating an area of which a three-dimensional radar image is to be generated, and set information being information on a set of pairs of a transmission antenna Tx and a reception antenna Rx for use in generation of the three-dimensional radar image. An imaging unit ( 104 ) generates the three-dimensional radar image from the radar signal in accordance with the imaging policy. A projection processing unit ( 106 ) forms the three-dimensional radar image into a two-dimensional image by projecting the three-dimensional radar image in the projection direction indicated by the imaging policy.
1 . A radar apparatus comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to perform operations, the operations comprising:
acquiring a radar signal generated by using a plurality of transmission antennas and a plurality of reception antennas;
holding an imaging policy including a projection direction representing a direction in which an inspection target is viewed, an imaging area indicating an area of which a three-dimensional radar image is to be generated, and set information being information on a set of pairs of a transmission antenna and a reception antenna for use in generation of the three-dimensional radar image;
generating the three-dimensional radar image from the radar signal in accordance with the imaging policy; and
forming the generated three-dimensional radar image into a two-dimensional image by projecting the generated three-dimensional radar image in the projection direction indicated by the imaging policy.
2 . The radar apparatus according to claim 1 , wherein
the imaging policy includes an algorithm for generating the three-dimensional radar image from the radar signal, or information that specifies the algorithm, and
the operations comprise generating the three-dimensional radar image by using the algorithm.
3 . The radar apparatus according to claim 1 , wherein
the transmission antenna and the reception antenna are arranged within at least two panels facing each other with a passage through which an inspection target passes interposed.
4 . The radar apparatus according to claim 3 , wherein
the two panels are parallel to each other.
5 . The radar apparatus according to claim 1 , wherein
the imaging policy is set for each of a plurality of the projection directions, and
the plurality of the projection directions include a front surface, a back surface, a left side surface, and a right side surface of the inspection target.
6 . The radar apparatus according to claim 4 , wherein
the imaging policy is set for each of a plurality of the projection directions,
the projection direction includes four directions at an interval of 90°, and
the four directions are perpendicular or parallel to the two panels.
7 . The radar apparatus according to claim 1 , wherein the operations comprise
performing determination as to whether the inspection target is present within the imaging area, and,
in a case where it is determined that the inspection target is present within the imaging area, performing generation of the three-dimensional radar image.
8 . The radar apparatus according to claim 7 , wherein the operations comprise
performing determination as to whether the inspection target is present within the imaging area, based on the radar signal.
9 . An imaging method comprising,
by a computer:
radar signal transmission/reception processing of acquiring a radar signal generated by using a plurality of transmission antennas and a plurality of reception antennas;
projection direction/imaging policy control processing of holding an imaging policy including a projection direction representing a direction in which an inspection target is viewed, an imaging area indicating an area of which a three-dimensional radar image is to be generated, and set information being information on a set of pairs of a transmission antenna and a reception antenna for use in generation of the three-dimensional radar image;
imaging processing of generating the three-dimensional radar image from the radar signal in accordance with the imaging policy; and
projection processing of forming the generated three-dimensional radar image into a two-dimensional image by projecting the generated three-dimensional radar image in the projection direction indicated by the imaging policy.
10 . A non-transitory computer-readable medium storing a program for causing a computer to include-perform operations, the operations comprising:
acquiring a radar signal generated by using a plurality of transmission antennas and a plurality of reception antennas;
holding an imaging policy including a projection direction representing a direction in which an inspection target is viewed, an imaging area indicating an area of which a three-dimensional radar image is to be generated, and set information being information on a set of pairs of a transmission antenna and a reception antenna for use in generation of the three-dimensional radar image;
generating the three-dimensional radar image from the radar signal in accordance with the imaging policy; and
forming the generated three-dimensional radar image into a two-dimensional image by projecting the generated three-dimensional radar image in the projection direction indicated by the imaging policy.