Fire Passage Obstruction Detection

Data streams in JSON format are output to the specified DIS channels or webhook URLs, including structured data and images.

The JSON result includes the alarm of fire passage obstructed by vehicles or by other objects.

JSON example (passageway obstructed by vehicles)

{
    "event_type": 1179649,
    "task_id": "a066974ae7334649a37257242c5fa4c3",
    "stream_id": "001",
    "timestamp": 1560346229,
    "message_id": "0DD1BEA6-634B-11E8-8B0B-407D0FAD9218",
    "image_base64":"/9j/4AAQSkZJRgA...",
     "data":{
         "event_set":[
            {
                "detection_id": "83BFC020-4FC8-11EA-9F93-0242AC110004",
                "plate_id":"XXXXXXX",
                "polygon_name":"",
                "bounding_box": {
                    "x":1712,
                    "y":560,
                    "w":207,
                    "h":180
                }
            }
        ]
    }
}

JSON example (passageway obstructed by other objects)

{
    "event_type": 1179648,
    "task_id": "a066974ae7334649a37257242c5fa4c3",
    "stream_id": "001",
    "timestamp": 1560346229,
    "message_id": "0DD1BEA6-634B-11E8-8B0B-407D0FAD9218",
    "image_base64":"/9j/4AAQSkZJRgA...",
     "data":{
         "event_set":[
            {
                "detection_id": "83BFC020-4FC8-11EA-9F93-0242AC110004",
                "polygon_name":"",
                "bounding_box": {
                    "x":679,
                    "y":376,
                    "w":483,
                    "h":342
                }
            }
        ]
    }
}

JSON format

Field	Type	Description
stream_id	String	Camera ID
event_type	Uint64	Quickly identifies the output message type of the service for detecting the occupation of the fire extinguishing channel. For object obstruction, the value is fixed to 1179648, which corresponds to 0x 0000 0000 0012 0000 in hexadecimal format. For vehicle obstruction, the value is fixed to 1179649, which corresponds to 0x 0000 0000 0012 0001 in hexadecimal format.
task_id	String	Task ID
message_id	String	UUID that uniquely identifies the output message
timestamp	Uint64	Time when the alarm is triggered
image_base64	String	Base64 encoding results of the video image when the alarm is triggered
data	Object	Service output content

data parameters

Field

Type

Description

event_set

List<Object>

List of events generated

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

event_set parameters

Field	Type	Description
bounding_box	Object	Rectangle for the alarm object
polygon_name	String	Name of the area where the target is located. For the area name setting, see the target_roi field. If the area name is not set, this field is an empty string by default.
detection_id	String	UUID of the alarm target. In the same detection area, the IDs of consecutively detected alarms remain unchanged. If the detection target is lost during tracking, the ID changes.
plate_id	String	License plate number of the vehicle in the reported alarm (7-digit or 8-digit). This parameter is available only when vehicle_occupation_sw is set to 1. Note that the license plate may be blocked, blurred, or some fields are similar. As a result, the license plate detection fails or is inaccurate. If the detection fails, an empty string is output.

bounding_box parameters

Field	Type	Description
x	Int	Horizontal coordinate of the upper-left corner of a bounding box
y	Int	Vertical coordinate of the upper-left corner of a bounding box
w	Int	Width of a bounding box
h	Int	Height of a bounding box