Information management apparatus, information management method, and non-transitory recording medium

1. An information management apparatus comprising:

at least one processor configured to execute a program stored in a storage, wherein

the at least one processor

acquires sequentially captured frames of a plurality of light sources,

acquires movement states of positions of the plurality of light sources in an imaging area based on light source images of the plurality of light sources contained in the acquired frames, the plurality of light sources transmitting information including illumination patterns indicating respective IDs of the plurality of light sources, and

determines a kind of an operation based on movement states of positions of the plurality of light sources transmitting information including illumination patterns of the light indicating the respective IDs of the plurality of light sources.

2. The information management apparatus according to claim 1 , wherein

the at least one processor

specifies a start frame at start of a displacement of the light source from the acquired frames, and

causes the storage to store the start frame for the movement state.

3. The information management apparatus according to claim 2 , wherein in a case in which the at least one processor acquires the movement state, the at least one processor acquires information including a variation in at least one of a length and an angle of a movement vector of at least one of the plurality of light sources.

4. The information management apparatus according to claim 3 , wherein

the at least one processor

determines (i) whether variations in lengths of movement vectors of at least part of the plurality of light sources are equal to or more than a first predetermined threshold, (ii) whether the lengths of movement vectors of at least part of the plurality of light sources are less than a second threshold that is less than the first threshold in a case in which the lengths of movement vectors of at least part of the plurality of light sources are determined not to be more than the first predetermined threshold, and (iii) whether a number of movement vectors of at least part of the plurality of light sources that are determined to be less than the first predetermined threshold and more than the second threshold is more than a preset value; and

determines the kind of the operation based on movement vectors of at least part of the plurality of light sources, wherein the number of movement vectors of at least part of the plurality of light sources is more than the preset value.

5. The information management apparatus according to claim 2 , wherein

the storage stores a reference information table serving as reference information for the information on movement of the plurality of light sources, and

in a case in which the information on movement of the plurality of light sources is acquired, the at least one processor determines whether the information on movement of the plurality of light sources matches the information in the reference information table.

6. The information management apparatus according to claim 5 , wherein in a case in which the at least one processor determines that the information on the movements of the plurality of light sources does not match the information in the reference information table, the at least one processor causes a display to display an alert screen.

7. The information management apparatus according to claim 1 , wherein the information transmitted from the plurality of light sources includes status information on objects of an operator equipped with respective ones of the plurality of light sources.

8. The information management apparatus according to claim 7 , wherein

the at least one processor detects behaviors of the object, and

the status information includes information on the detected behaviors of the object.

9. The information management apparatus according to claim 7 , wherein

the information stored in the storage is information indicating an operation process executed by the operator.

10. The information management apparatus according to claim 7 , wherein

the object is a moving body for carrying a load, and

the status information includes information on existence of the load on the moving body or information on a type of the load.

11. The information management apparatus according to claim 1 , wherein the at least one processor generates moving image data including the acquired frames.

12. An information management method executed by an information management apparatus comprises:

acquiring frames of a plurality of light sources sequentially captured by an imager;

acquiring movement states of positions of the plurality of light sources in an imaging area based on light source images of the plurality of light sources contained in the acquired frames, the plurality of light sources transmitting information including illumination patterns indicating respective IDs of the plurality of light sources; and

determining a kind of an operation based on movement states of positions of the plurality of light sources transmitting information including illumination patterns of the light indicating the respective IDs of the plurality of light sources.

13. The information management method according to claim 12 , the method further comprising:

specifying a start frame at start of a displacement of the light source from the acquired frames, and,

causing the storage to store the start frame for the movement state.

14. The information management method according to claim 13 , wherein in a case in which the at least one processor acquires the movement state, the at least one processor acquires information including a variation in at least one of a length and an angle of a movement vector of at least one of the plurality of light sources.

15. The information management method according to claim 14 , further comprising:

determining (i) whether variations in lengths of movement vectors of at least part of the plurality of light sources are equal to or more than a first predetermined threshold, (ii) whether the lengths of movement vectors of at least part of the plurality of light sources are less than a second threshold that is less than the first threshold in a case in which the lengths of movement vectors of at least part of the plurality of light sources are determined not to be more than the first predetermined threshold, and (iii) whether a number of movement vectors of at least part of the plurality of light sources that are determined to be less than the first predetermined threshold and more than the second threshold is more than a preset value; and

determining the kind of the operation based on movement vectors of at least part of the plurality of light sources, wherein the number of movement vectors of at least part of the plurality of light sources is more than the preset value.

16. The information management method according to claim 12 , wherein the information transmitted from the plurality of light sources includes status information on objects of an operator equipped with respective ones of the plurality of light sources.

17. The information management method according to claim 16 , the method further comprising:

detecting behaviors of the object, wherein

the status information includes information on the detected behaviors of the object.

18. The information management method according to claim 16 , wherein

the information stored in the storage is information indicating an operation process executed by the operator.

19. The information management method according to claim 16 , wherein

the object is a moving body for carrying a load, and

the status information includes information on existence of the load on the moving body or information on a type of the load.

20. The information management method according to claim 12 , the method further comprising generating moving image data including the acquired frames.

21. A non-transitory computer-readable recording medium storing a program thereon executable by at least one processor of an information management apparatus, wherein

the program causes the at least one processor to

acquire frames of a plurality of light sources sequentially captured by an imager,

acquire movement states of positions of the plurality of light sources in an imaging area based on light source images of the plurality of light sources contained in the acquired frames, the plurality of light sources transmitting information including illumination patterns indicating respective IDs of the plurality of light sources; and

determine a kind of an operation based on movement states of positions of the plurality of light sources transmitting information including illumination patterns of the light indicating the respective IDs of the plurality of light sources.