Living object detection method and apparatus and electronic device
AssigneeFujitsu Limited
InventorsLili Xie, Jun Tian, Hongchun Li, Qian Zhao
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Abstract
Embodiments of this disclosure provide a living object detection method and apparatus and electronic device. The apparatus includes a processor to calculate a distance matrix according to variance of Fourier transform amplitude values of radio signals received by a radio signal receiver within a determined period of time; and to calculate a distance between an object among objects and the radio signal receiver according to the distance matrix. According to this disclosure, a position of a living object among the objects may be detected based upon the distance in multiple scenarios.
Claims10
An apparatus to detect an object among objects as a living object according to radio signals received by a radio signal receiver, the apparatus comprising:
- a processor to couple to a memory and to,
- calculate a distance matrix according to variance of Fourier transform amplitude values of the radio signals received by the radio signal receiver within a determined period of time;
- and
- calculate a distance between the object and the radio signal receiver according to the distance matrix;
- wherein
- the distance matrix,
- has two or more elements, a value of each element denoting a probability indicative of existence of the living object in a distance range to which the element corresponds,
- the element having a first distance index and a second distance index, the distance range to which the element corresponds being greater than or equal to a smaller one of a distance to which the first distance index corresponds and a distance to which the second distance index corresponds, and less than or equal to a larger one the distance to which the first distance index corresponds and the distance to which the second distance index corresponds, and
- when an absolute value of a difference between the first distance index and the second distance index is less than a determined value n and greater than 0, the processor is to grant a determined value of σ1 or σ2 for corresponding elements in the distance matrix, otherwise the processor is to grant the determined value of σ2 for corresponding elements in the distance matrix.
A living object detection method, in which an object among objects is detected as a living object according to radio signals received by a radio signal receiver, the method comprising:
- calculating a distance matrix according to variance of Fourier transform amplitude values of the radio signals received by the radio signal receiver within a determined period of time;
- and
- calculating a distance between the object and the radio signal receiver according to the distance matrix;
- wherein,
- the distance matrix,
- has two or more elements, a value of each element denoting a probability indicative of existence of the living object in a distance range to which the element corresponds,
- the element having a first distance index and a second distance index, the distance range to which the element corresponds being greater than or equal to a smaller one of a distance to which the first distance index corresponds and a distance to which the second distance index corresponds, and being less than or equal to a larger one of the distance to which the first distance index corresponds and the distance to which the second distance index corresponds, and
- when an absolute value of a difference between the first distance index and the second distance index is less than a determined value n and greater than 0, the processor is to grant a determined value of σ1 or σ2 for corresponding elements in the distance matrix, otherwise the processor is to grant the determined value of σ2 for corresponding elements in the distance matrix.
Dependencies are inferred from the claim text.