People Flow Counting

Data streams in JSON format are output to the specified DIS channels or webhook URLs, including the people flow statistics when passing a straight line or within a specific region, and the heatmap statistics.

Line-crossing people flow statistic on the edge

Result example

{
    "task_id":"ee7d7f5c7ba24839b6abaf5b81607496",
    "stream_id":"test",
    "event_type":131073,
    "timestamp":1535546730,
    "message_id":"849D1326-4FC8-11EA-8F73-0242AC110004",
    "data":{
        "interval":2,
        "event_set":[
            {
                "line":[
                    [
                        480,
                        1440
                    ],
                    [
                        540,
                        540
                    ]
                ],
                "line_id":0,
                "side1_count":1,
                "side2_count":0,
                "side1_name":"side1",
                "side2_name":"side2"
            },
            {
                "line":[
                    [
                        490,
                        1500
                    ],
                    [
                        640,
                        340
                    ]
                ],
                "line_id":1,
                "side1_count":1,
                "side2_count":2,
                "side1_name":"in",
                "side2_name":"out"
            }
        ]
    }
}

Example of region-entering people flow statistics

{
    "task_id":"ee7d7f5c7ba24839b6abaf5b81607496",
    "stream_id":"test",
    "event_type":131074,
    "timestamp":1535546604,
    "message_id":"849D1326-4FC8-11EA-8F73-0242AC110004",
    "data":{
        "event_set":[
            {
                "polygon":[
                    [
                        480,
                        270
                    ],
                    [
                        1440,
                        270
                    ],
                    [
                        1440,
                        810
                    ],
                    [
                        480,
                        810
                    ]
                ],
                "count":2,
                "region_id":0
            },
            {
                "polygon":[
                    [
                        480,
                        200
                    ],
                    [
                        1110,
                        170
                    ],
                    [
                        1040,
                        510
                    ],
                    [
                        280,
                        310
                    ]
                ],
                "count":1,
                "region_id":1
            }
        ]
    }
}

Heatmap detection result

{
     "task_id":"ee7d7f5c7ba24839b6abaf5b81607496",
     "stream_id": "test1",
     "event_type": 131075,
     "timestamp": 5,
     "message_id":"849D1326-4FC8-11EA-8F73-0242AC110004",
     "data":{
         "interval":1,
         "heat_image_base64": "/9j/4AAQSkZJRgABAJDA...",
         "heatpoint_image_base64": "/9j/2wBDAAMCAgMCAgMD..."
     }
}

JSON format

Field	Type	Description
task_id	String	Task ID
stream_id	String	Camera ID
event_type	Uint64	Event type of the output message. JSON format: For line-crossing people flow statistics, the value is fixed to 131073, which is 0x 0000 0000 0002 0001 in hexadecimal format. For region-entering people flow statistics, the value is fixed to 131074, which is 0x 0000 0000 0002 0002 in hexadecimal format. For heatmap statistics, the value is fixed to 131075, which is 0x 0000 0000 0002 0003 in hexadecimal format.
message_id	String	Alarm ID in the form of a UUID
timestamp	Uint64	End time of line-crossing people flow statistics, region-entering people flow statistics, and heatmap statistics
data	Object	Service output content

data parameters of line-crossing people flow detection

Field	Type	Description
interval	Int	Interval for line-crossing people flow detection, in seconds
event_set	List<Object>	List of events generated

event_set parameters

Field	Type	Description
line	List<Object>	Sets of start and end points that form lines, for example, [[50,60],[1000,1000]]. The first point indicates the start point, and the second point indicates the end point.
line_id	Int	ID of a straight line
side1_count	Int	People passing through a straight line to side1_name
side2_count	Int	People passing through a straight line to side2_name
side1_name	String	Name of side1
side2_name	String	Name of side2

data parameters of region-entering people flow detection

Field	Type	Description
event_set	List<Object>	List of events generated

event_set parameters

Field	Type	Description
polygon	List<Object>	A set of points that form a polygon, for example, [[484,465],[1850,450],[1905,1013],[515,1050]]
region_id	Int	Region ID
count	Int	People flow statistics of a region at the current time

data parameters of heatmap detection

Field	Type	Description
interval	Int	Detection period of the heatmap, in seconds
heat_image_base64	Object	Base64 encoding results of heatmap detection
heatpoint_image_base64	Object	Base64 encoding results after detecting the hotspot and generating the heatmap. The pixel value in the heatmap indicates the number of people detected in a position.