Powered By GitBook
Output JSON format
Details about JSON in downloaded output JSON file
Labels in a 2D and a 3D project can be downloaded in a JSON file. Output JSON file consists of a labels array object, which has the following fields:
    1.
    file_id (string): refers to the ID of the image/frame to which the label belongs to.
    2.
    label_category_id (string): refers to the label category of the label.
    3.
    label_id (string): refers to the ID of the label.
    4.
    label_type (string): refers to the type of label created. It can have values of the following possible values with their corresponding description: a. box: this is a 2D bounding box label b. lane: this is a 2D lane label c. polygon: this is a 2D polygon label d. point: this is a 2D point label e. scene: this is a 2D scene label f. 3d_bbox: this is a 3D bounding box label g. 3d_point: this is a 3D point label h. 3d_polyline: this is a 3D polyline label i. 3d_polygon: this is a 3D polygon label j. scene: this is a 3D scene label
    5.
    stage_id(string): refers to the stage of the label
    6.
    attributes_source: refers to if attributes are added manually or automatically.
    7.
    create_time_millis: refers to the time at which the label is created in milliseconds.
    8.
    label_set_id: help multiple users to label the same object using their label set the id.
    9.
    labeller_email: displays the labeller email.
    10.
    sensor_id: displays the sensor id.
    11.
    update_time_millis: refers to the last updated time at which a label is updated in milliseconds.
    12.
    attributes (object): consists of the key-value pair for each label attribute.
    13.
    box (array): An array of 4 numbers representing a 2D bounding box. The first two numbers refer to the x, y coordinates of the top left corner. The third and fourth number in the array refers to the length of the bounding box along the x and y axes respectively. This field is populated only when the label type is a box.
    14.
    polygons (array): An array of polygons. Each polygon is an array of points. Each point is a 2-length array of x and y coordinates. This field is populated only when the label type is polygon or lane.
    15.
    point (array): consists of coordinates of the point. This field is populated only when the label type is the point.
    16.
    three_d_bbox (object): has the following fields: a. l (float): refers to the length of a 3D bounding box b. w (float): refers to the width of a 3D bounding box c. h (float): depicts the height of the 3D bounding box d. cx (float): refers to the x coordinate of the center of the 3D bounding box e. cy (float): refers to the y coordinate of the center of the 3D bounding box f. cz (float): refers to the z coordinate of the center of the 3D bounding box g. rot_z (float): depicts the angle (in radians) made by the front face of the 3D bounding box with the negative x-axis measured in the clockwise direction. h. quaternion: depicts the rotation angles of the box in quaternions. This field is populated only when the label type is 3d_bbox.
    17.
    three_d_point_indices (array): consists of indices of LiDAR points in the point cloud file. This field is populated only when the label type is 3d_point.
    18.
    three_d_polygon (array): is an array of x, y and z coordinates of different points comprising the polygon. This field is populated only when the label type is 3d_polygon.
    19.
    three_d_polyline (object): has the following fields: a. polyline (array): consists of x, y and z coordinate values of the points creating polyline. b. polyline_width (float) : is the value of width of polyline. This field is populated only when the label type is 3d_polyline.
Last modified 7mo ago
Export as PDF
Copy link