Information processing apparatus, information processing method, and program
An information processing apparatus includes an acquisition unit that acquires first position information indicating a position of a target object in a target region and a generation unit that generates, on the basis of the first position information, second position information including area mesh information that indicates a target area mesh containing the target object and included in plural area meshes produced by dividing the target region in a first direction and a second direction such that a division number in the second direction varies for each position in the first direction in the target region and relative position information that indicates a position of the target object in the target area mesh. The present technology is applicable to a transmission device and a reception device.
1. An information processing apparatus comprising:
an antenna; and
circuitry including a CPU that is configured by execution of computer readable instructions to
acquire self-position information indicating a self-position of the information processing apparatus in a target region; and
generate, based on the self-position information, absolute position information including area mesh information that indicates a position of a target area mesh containing the information processing apparatus among plural area meshes defined by dividing the target region in a first direction and a second direction such that a division number in the second direction varies for each dividing position in the first direction in the target region, and relative position information that indicates a position of the information processing apparatus in the target area mesh, wherein
the absolute position information includes
first absolute position information that indicates an absolute position of the information processing apparatus in the first direction in the target region, the first absolute position information including first area mesh information that indicates a position of the target area mesh in the first direction in the target region and first relative position information that indicates a position of the information processing apparatus in the first direction in the target area mesh, and
second absolute position information that indicates an absolute position of the information processing apparatus in the second direction in the target region, the second absolute position information including second area mesh information that indicates a position of the target area mesh in the second direction in the target region and second relative position information that indicates a position of the information processing apparatus in the second direction in the target area mesh, and wherein
the circuitry is further configured to
receive through the antenna other first relative position information and other second relative position information of a target object both transmitted from a transmitter of the target object, a combination of the antenna and the transmitter having a maximum communication distance R within which the other first relative position information and the other second relative position information of the target object transmitted from the transmitter are receivable through the antenna, and the maximum communication distance R of the combination of the antenna and the transmitter meeting a condition that D is longer than 2R where D is a length of a side of the target area mesh, and
generate absolute position information of the target object, based on the first area mesh information and the second area mesh information of the information processing apparatus and the other first relative position information and the other second relative position information of the target object.
2. The information processing apparatus according to claim 1 , wherein the target region is a curved surface.
3. The information processing apparatus according to claim 1 , wherein the area mesh information includes information that indicates a position of the target area mesh in the target region.
4. The information processing apparatus according to claim 1 , wherein a quantity of bits of the second area mesh information varies according to the division number of the target region in the second direction.
5. The information processing apparatus according to claim 1 , wherein each of the first relative position information and the second relative position information has a predetermined number of bits.
6. The information processing apparatus according to claim 1 , wherein each of the first absolute position information and the second absolute position information includes unsigned binary fixed-point information.
7. The information processing apparatus according to claim 1 , wherein
the first absolute position information is information that indicates latitude of the information processing apparatus, and
the second absolute position information is information that indicates longitude of the information processing apparatus.
8. The information processing apparatus according to claim 1 , wherein each of a division number of the target region in the first direction and a division number of the target region in the second direction is a power of 2.
9. The information processing apparatus according to claim 1 , wherein a division number of the target region in the first direction varies according to a position in the first direction in the target region.
10. The information processing apparatus according to claim 1 , wherein
the circuitry is further configured to generate plural candidates of the absolute position information of the target object on an assumption that the target object is present in one of the target area mesh and plural area meshes adjacent to the target area mesh, and
the circuitry is further configured to designate, as a final absolute position information of the target object, one of the plural candidates of the absolute position information that indicates a position nearest to the information processing apparatus.
11. The information processing apparatus according to claim 1 , wherein a distance from the information processing apparatus to the target object is shorter than a half of a length of the target area mesh in the first direction or a half of a length of the target area mesh in the second direction.
12. An information processing method performed by an information processing apparatus that has an antenna, the information processing method comprising:
acquiring self-position information indicating a self-position of the information processing apparatus in a target region; and
generating, on a basis of the self-position information, absolute position information including area mesh information that indicates a position of a target area mesh containing the information processing apparatus among plural area meshes defined by dividing the target region in a first direction and a second direction such that a division number in the second direction varies for each dividing position in the first direction in the target region, and relative position information that indicates a position of the information processing apparatus in the target area mesh, wherein
the absolute position information includes
first absolute position information that indicates an absolute position of the information processing apparatus in the first direction in the target region, the first absolute position information including first area mesh information that indicates a position of the target area mesh in the first direction in the target region and first relative position information that indicates a position of the information processing apparatus in the first direction in the target area mesh, and
second absolute position information that indicates an absolute position of the information processing apparatus in the second direction in the target region, the second absolute position information including second area mesh information that indicates a position of the target area mesh in the second direction in the target region and second relative position information that indicates a position of the information processing apparatus in the second direction in the target area mesh, and wherein
the information processing method further comprises
receiving through the antenna other first relative position information and other second relative position information of a target object both transmitted from a transmitter of the target object, a combination of the antenna and the transmitter having a maximum communication distance R within which the other first relative position information and the other second relative position information of the target object transmitted from the transmitter are receivable through the antenna, and the maximum communication distance R of the combination of the antenna and the transmitter meeting a condition that Dis longer than 2R where D is a length of a side of the target area mesh, and
generating absolute position information of the target object, based on the first area mesh information and the second area mesh information of the information processing apparatus and the other first relative position information and the other second relative position information of the target object.
13. A non-transitory computer-readable storage medium storing a program causing a computer of an information processing apparatus having an antenna to execute a process comprising steps of:
acquiring self-position information indicating a self-position of an information processing apparatus in a target region; and
generating, on a basis of the self-position information, absolute position information including area mesh information that indicates a position of a target area mesh containing the information processing apparatus among plural area meshes defined by dividing the target region in a first direction and a second direction such that a division number in the second direction varies for each dividing position in the first direction in the target region, and relative position information that indicates a position of the information processing apparatus in the target area mesh, wherein
the absolute position information includes
first absolute position information that indicates an absolute position of the information processing apparatus in the first direction in the target region, the first absolute position information including first area mesh information that indicates a position of the target area mesh in the first direction in the target region and first relative position information that indicates a position of the information processing apparatus in the first direction in the target area mesh, and
second absolute position information that indicates an absolute position of the information processing apparatus in the second direction in the target region, the second absolute position information including second area mesh information that indicates a position of the target area mesh in the second direction in the target region and second relative position information that indicates a position of the information processing apparatus in the second direction in the target area mesh, and wherein
the process further comprises steps of
receiving through the antenna other first relative position information and other second relative position information of a target object both transmitted from a transmitter of the target object, a combination of the antenna and the transmitter having a maximum communication distance R within which the other first relative position information and the other second relative position information of the target object transmitted from the transmitter are receivable through the antenna, the maximum communication distance R of the combination of the antenna and the transmitter meeting a condition that D is longer than 2R where D is a length of a side of the target area mesh, and
generating absolute position information of the target object, based on the first area mesh information and the second area mesh information of the information processing apparatus and the other first relative position information and the other second relative position information of the target object.