[summary] Update the direction of the detection in ele by the given direction Arguments: ele {[dict]} -- detection in day2

Write the tracked detections to kafka topic Arguments: json_list {list} -- the list of detections in day2 schema

Transfer vehicle attributes such as license plate, make, color from one record (act_record) to all the records in the list (j

Initialize Streaming MC tracker Arguments: in_kafkaservers {string} -- Input kafka bootstrap servers in_kafka

Initialization Returns: None

Init method Arguments: config [dict] -- A dictionary that has the following keys a. "overlappig_camera_ids": This

Init method Arguments: config [dict] -- A dictionary that has the following keys a. "overlappig_camera_i

Based on entry and exit points, we assign entry and exit camearas Arguments: cameras_dict {dict} -- Dict of cameras cam_rtree {RT

Enhance the graph attributes for entry and exit points Arguments: entry_points {list} -- List of entry points kd_points {KDT

Function to check timestamp is valid Arguments: json_ele {dict} -- The detection dictionary as a day2 schema Returns: b

Create a polygon dictionary from a list of polygon points This can be used for one time creation of polygons so that we dont have to repe

This method will input a json list and resample the json list by timestamp It will return a ordered-dictionary where key is a timestamp resam

Densify the entire graph given by lines "currentgraph" Arguments: currentgraph {list} -- list of lines that make the current graph

Draw the network using matplotlib

Get the distance in km between two (lng,lat) poinmts Arguments: pt1 {list} -- (lng,lat) of first point pt2 {list} -- (lng,la

Interpolate on great sphere (world coords) Arguments: point0 {list} -- (lng,lat) of first point point1 {list} -- (lng,lat) of fir

Get the angle between two points on a sphere Arguments: the_pt1 {list} -- (lng,lat) of first point the_pt2 {list} -- (lng,la

Get the sensor/camera id of the detection Arguments: json_ele {[dict]} -- Detection record in day2 schema Returns: [str

Get eucledian distance between two points pt1 and pt2 Note that we assume we pass flat earth coords (x,y) and (lng,lat), since eucledian

Get the flat earth coordinates (x,y) from a given (lng,lat) point "pt". The (x,y) is the offset in lng and lat dimensions (in meters or km)

Interpolate a path between st_pt and end_pt on the graph Arguments: st_pt {int} -- The id of the starting point

Get the (lng, lat) from a given eucledian point (x,y). The origin point is given by origin_lnglat in (longitude, latitude) format. We assume

Return the xy point with maximum y from the set of points Arguments: pts {list} -- List of (global_x,global_y, cam_x, cam_y) points

Return the mean xy point (x_mean, y_mean) from the set of points Arguments: pts {list} -- List of (x,y) points Returns:

Return the median xy point (x_median, y_median) from the set of points Arguments: pts {list} -- List of (x,y) points Returns:

Get the first nearest point on the graph for a given "pt" Arguments: thept {[list]} -- [x,y] point Returns:

Get the object id value of a detected vehicle. The object id is a combination of the sensor id and the object id Arguments: json

Get the object id value of a detected vehicle. The object id returned in this function is a string of the the object id (prefixed by some

Get the origin point of all points (mean lng and lat) Arguments: pt_dict {[list]} -- list of all points Returns: list -

Get all polygons from a given shape file Arguments: sh_file {[string]} -- The shapefile Returns: [list] -- list of polygons

Get a list of polygon lines (polylines) from shapefile Arguments: sh_file {[string]} -- the shapefile name Returns:

Get the angle for two given points (in flat earth coords) Arguments: pt1 {list} -- (x,y) for the first point pt2 {list} -- (x,y)

Get the angle for two given points (in flat earth coords) Arguments: pt1 {list} -- (x,y) for the first point pt2 {list} -- (x,y)

Generate a random license plate string (in standard California state style) Returns: [string] -- Random license plate string

Return the string formatted timestamp for a given datetime object. We assume that the datetime object is in the UTC timezone Return format = '

Get a string that describes a vehicle (in terms of its attributes). Currently it just returns the license plate. It can be extended to re

Get the x and y values of a detected vehicle Arguments: json_ele {[dict]} -- Detection record in day2 schema Returns: [

Function that ignores badly formatted json_list. This function should be called before other processing functions so that we do not crash on

There might be some areas where vehicle detections are to be ignored (e.g., because of a lot of FPs in those areas). This function remove

Interplolate a line between two points the_pt1 and the_pt2 with the given proportion Arguments: the_pt1 {list} -- the first point (x,

Returns if the given detection is of a vehicle is for a vehicle on aisle. The record is a aisle record if the "place" has a "aisle", "entrace

Returns if the given detection is of a parking spot that is empty. The record is a parking spot record if the "place" has a "parkingSpot"

Returns if the given detection is of a vehicle parked record. The record is a parking spot record if the "place" has a "parkingSpot" element,

Returns if the given detection is of a vehicle that has pulled from a parking spot. The record is a parking spot record if the "place" ha

Is the given detection a parking spot record? The record is a parking spot record if the "place" has a "parkingSpot" element, and if the even

Convert a set of polylines to a simple lines (start and end points) Arguments: polyline_list {list} -- Set of polylines Returns:

Read jsons from a file. The file is assumed to contain jsons in day2 schema. Each line will have one record, and no empty or invalid line

Function to read an entire json schema file and mctrack from it Returns: [list] -- List of Day2 schema dictionaries with tracked obj

Signal handler. This function will dump all tracker stats and exit Arguments: signum {int} -- The signal number frame {list} -- S