Ranging method and device, storage medium, and LiDAR

1 . A ranging method, applied to a LiDAR, comprising:

determining an edge field of view and a central field of view;

acquiring a light emission power for the edge field of view and a light emission power for the central field of view;

compensating the light emission power for the edge field of view based on a difference between the light emission power for the edge field of view and the light emission power for the central field of view, wherein the light emission power for the central field of view is consistent with the compensated light emission power for the edge field of view; and

detecting a target object based on the light emission power for the central field of view and the compensated light emission power for the edge field of view.

2 . The method according to claim 1 , wherein, before compensating the light emission power for the edge field of view based on the difference between the light emission power for the edge field of view and the light emission power for the central field of view, the method further comprises:

determining an emitting unit group corresponding to the edge field of view and an emitting unit group corresponding to the central field of view,

wherein compensating the light emission power for the edge field of view based on the difference between the light emission power for the edge field of view and the light emission power for the central field of view comprises:

acquiring a difference between a light emission power of the emitting unit group corresponding to the edge field of view and a light emission power of the emitting unit group corresponding to the central field of view; and

controlling an emitting parameter of the emitting unit group corresponding to the edge field of view to compensate the light emission power for the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view.

3 . The method according to claim 2 , wherein controlling the emitting parameter of the emitting unit group corresponding to the edge field of view to compensate the light emission power for the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view comprises:

increasing the light emission power for the edge field of view by increasing the number of lasers emitting in parallel in the emitting unit group corresponding to the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view.

4 . The method according to claim 2 , wherein controlling the emitting parameter of the emitting unit group corresponding to the edge field of view to compensate the light emission power for the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view comprises:

increasing the light emission power for the edge field of view by adding an emitting pulse sequence within a preset duration of each of the lasers in the emitting unit group corresponding to the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view.

5 . The method according to claim 2 , wherein controlling the emitting parameter of the emitting unit group corresponding to the edge field of view to compensate the light emission power for the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view comprises:

increasing the light emission power for the edge field of view by increasing emitting power of each of the lasers in the emitting unit group corresponding to the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view.

6 . The method according to claim 2 , wherein, before controlling the emitting parameter of the emitting unit group corresponding to the edge field of view to compensate the light emission power for the edge field of view based on the difference between the light emission power of the emitting unit group corresponding to the edge field of view and the light emission power of the emitting unit group corresponding to the central field of view, the method further comprises:

determining a number of emitting unit groups corresponding to the edge field of view, and when at least two emitting unit groups are determined to correspond to the edge field of view, determining whether the at least two emitting unit groups meets a physical condition of no optical crosstalk; and

when the at least two emitting unit groups comprise emitting unit groups meeting the physical condition of no optical crosstalk, compensating the light emission power for the edge field of view by controlling in parallel emitting parameters of the emitting unit groups meeting the physical condition of no optical crosstalk.

7 . The method according to claim 1 , wherein, before compensating the light emission power for the edge field of view based on the difference between the light emission power for the edge field of view and the light emission power for the central field of view, the method further comprises:

partitioning the edge field of view according to an angle of view corresponding to the edge field of view;

calculating differences between light emission power for partitions of the edge field of view and the light emission power for the central field of view respectively; and

compensating the light emission power for the edge field of view according to the differences between the light emission power for the partitions of the edge field of view and the light emission power for the central field of view.

8 . A non-transitory computer storage medium, wherein the non-transitory computer storage medium stores a plurality of instructions, and the plurality of instructions are capable of being loaded by a processor to perform the method according to claim 1 .

9 . A ranging device for a LiDAR, comprising:

a field-of-view determining module, configured to determine an edge field of view and a central field of view;

a power acquiring module, configured to acquire a light emission power for the edge field of view and a light emission power for the central field of view;

a power compensating module, configured to compensate the light emission power for the edge field of view based on a difference between the light emission power for the edge field of view and the light emission power for the central field of view, wherein the light emission power for the central field of view is consistent with the compensated light emission power for the edge field of view; and

a ranging module, configured to detect a target object based on the light emission power for the central field of view and the compensated light emission power for the edge field of view.