Vehicle Analytics REST API - Preview
The Sighthound Cloud API returns detection coordinates and annotations for all vehicles and license plates detected in an image. For vehicles, the annotations include make, model, color, and generation. For license plates, the annotations include the characters from the plate and region (e.g. Florida, Germany, etc.).
Request Format
Headers
Sighthound will provide an API key to you. This key is required to be in the request header as shown below.
Body
There are two ways to send images to the Cloud API: by using a URI or base64-encoded content. See the image object in the examples below.
Only JPG and PNG images are supported at this time. If your use case requires a different format, please contact us.
Image URI
{
"requests": [
{
"image": {
"source": {
"imageUri": "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
}
},
"features": [
{
"type": "VEHICLE_DETECTION"
},
{
"type": "LICENSE_PLATE_DETECTION"
}
]
}
]
}
Base64 Content
{
"requests": [
{
"image": {
"content": "/9j/4QAYR...truncatedBase64String...ZUcQP/2Q=="
},
"features": [
{
"type": "VEHICLE_DETECTION"
},
{
"type": "LICENSE_PLATE_DETECTION"
}
]
}
]
}
Examples
Request
Update YOUR-API-KEY with your actual key.
curl --location --request POST 'https://preview.sighthoundapi.com/v11/images:annotate' \
--header 'Content-Type: application/json' \
--header "X-API-Key: YOUR-API-KEY" \
--data-raw '{
"requests": [
{
"image": {
"source": {
"imageUri": "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
}
},
"features": [
{
"type": "VEHICLE_DETECTION"
},
{
"type": "LICENSE_PLATE_DETECTION"
}
]}
]}'
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Text.Json;
namespace Sighthound {
public class Feature {
public string type { get; set; }
}
public class Source {
public string imageUri { get; set; }
}
public class Image {
public Source source { get; set; }
}
public class Request {
public Image image { get; set; }
public List<Feature> features { get; set; }
}
public class BatchRequest {
public List<Request> requests { get; set; }
}
public class Example {
public static void Main() {
var apiUrl = "https://preview.sighthoundapi.com/v11/images:annotate";
var batchRequest = new BatchRequest {
requests = new List<Request>(
new Request[] {
new Request {
image = new Image {
source = new Source {
imageUri = "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
}
},
features = new List<Feature>(
new Feature[] {
new Feature {
type = "VEHICLE_DETECTION"
},
new Feature {
type = "LICENSE_PLATE_DETECTION"
}
}
)
}
}
)
};
string requestJson = JsonSerializer.Serialize(batchRequest);
byte[] requestData = Encoding.UTF8.GetBytes(requestJson);
var webRequest = (HttpWebRequest)WebRequest.Create(apiUrl);
webRequest.Method = "POST";
webRequest.Accept = "application/json";
webRequest.ContentType = "application/json";
webRequest.ContentLength = requestData.Length;
webRequest.GetRequestStream().Write(requestData, 0, requestData.Length);
webRequest.Headers.Add("X-API-Key", "YOUR-API-KEY"); //Add your API key here
using var webResponse = webRequest.GetResponse();
using var webStream = webResponse.GetResponseStream();
using var responseReader = new StreamReader(webStream);
var responseJson = responseReader.ReadToEnd();
var responseData = JsonDocument.Parse(responseJson);
var response = responseData.RootElement.GetProperty("responses")[0];
Console.WriteLine("detected " +
response.GetProperty("vehicleAnnotations").GetArrayLength() + " vehicles and " +
response.GetProperty("licenseplateAnnotations").GetArrayLength() + " license plates");
}
}
}
package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
type Source struct {
ImageUri string `json:"imageUri"`
}
type Image struct {
Source Source `json:"source"`
}
type Feature struct {
Type string `json:"type"`
}
type Request struct {
Image Image `json:"image"`
Features []Feature `json:"features"`
}
type BatchRequest struct {
Requests []Request `json:"requests"`
}
type ExampleResponse struct {
VehicleAnnotations []interface{} `json:"vehicleAnnotations"`
LicenseplateAnnotations []interface{} `json:"licenseplateAnnotations"`
}
type ExampleBatchResponse struct {
Responses []ExampleResponse `json:"responses"`
}
var apiUrl = "https://preview.sighthoundapi.com/v11/images:annotate"
func main() {
batchRequest := BatchRequest{
Requests: []Request{
{
Image: Image{
Source: Source{
ImageUri: "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg",
},
},
Features: []Feature{
{
Type: "VEHICLE_DETECTION",
},
{
Type: "LICENSE_PLATE_DETECTION",
},
},
},
},
}
httpRequestBody, _ := json.Marshal(batchRequest)
httpRequest, _ := http.NewRequest("POST", apiUrl, bytes.NewBuffer(httpRequestBody))
httpRequest.Header.Set("Content-Type", "application/json")
httpRequest.Header.Set("Accept", "application/json")
httpRequest.Header.Set("X-API-Key", "YOUR-API-KEY") //Add your API key here
httpClient := &http.Client{}
httpResponse, error := httpClient.Do(httpRequest)
if error != nil {
fmt.Println("request failed:", error)
return
}
defer httpResponse.Body.Close()
if httpResponse.Status != "200 OK" {
fmt.Println("response error:", httpResponse.Status)
return
}
responseBody, _ := ioutil.ReadAll(httpResponse.Body)
var batchResponse ExampleBatchResponse
err := json.Unmarshal(responseBody, &batchResponse)
if err != nil {
fmt.Println("parse error:", err)
return
}
fmt.Println("detected",
len(batchResponse.Responses[0].VehicleAnnotations), "vehicles and",
len(batchResponse.Responses[0].LicenseplateAnnotations), "license plates")
}
import java.net.*;
import java.net.http.*;
import org.json.*;
class Example {
public static void main(String[] args) throws Exception {
System.setProperty("java.net.preferIPv6Addresses","true"); // for correct "localhost" resolution
var imageSource = new JSONObject();
imageSource.put("imageUri", "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg");
var image = new JSONObject();
image.put("source", imageSource);
var featureVehicleDetection = new JSONObject();
featureVehicleDetection.put("type", "VEHICLE_DETECTION");
var featureLicenseplateDetection = new JSONObject();
featureLicenseplateDetection.put("type", "LICENSE_PLATE_DETECTION");
var features = new JSONArray();
features.put(featureVehicleDetection);
features.put(featureLicenseplateDetection);
var request = new JSONObject();
request.put("image", image);
request.put("features", features);
var requests = new JSONArray();
requests.put(request);
var batchRequest = new JSONObject();
batchRequest.put("requests", requests);
var apiUrl = "https://preview.sighthoundapi.com/v11/images:annotate";
var httpRequest = HttpRequest.newBuilder()
.uri(URI.create(apiUrl))
.header("Content-Type", "application/json")
.header("Accept", "application/json")
.header("X-API-Key", "YOUR-API-KEY") //Add your API key here
.POST(HttpRequest.BodyPublishers.ofString(batchRequest.toString()))
.build();
var httpClient = HttpClient.newHttpClient();
var httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandlers.ofString());
if (httpResponse.statusCode() == 200) {
var batchResponse = new JSONObject(httpResponse.body());
var response = batchResponse.getJSONArray("responses").getJSONObject(0);
System.out.printf("detected %d vehicles and %d license plates%n",
response.getJSONArray("vehicleAnnotations").length(),
response.getJSONArray("licenseplateAnnotations").length());
}
}
}
const apiUrl = "https://preview.sighthoundapi.com/v11/images:annotate";
const batchRequest = {
requests: [
{
image: {
source: {
imageUri: "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
}
},
features: [
{
type: "VEHICLE_DETECTION"
},
{
type: "LICENSE_PLATE_DETECTION"
}
]
}
]
};
const fetchResponse = await fetch(apiUrl, {
body: JSON.stringify(batchRequest),
headers: {
"Content-Type": "application/json"
"X-API-Key": "YOUR-API-KEY" //Add your API key here
},
method: "POST"
});
const batchResponse = await fetchResponse.json();
const response = batchResponse.responses[0];
console.log("detected",
response.vehicleAnnotations.length, "vehicles and",
response.licenseplateAnnotations.length, "license plates");
<?php
$apiUrl = "https://preview.sighthoundapi.com/v11/images:annotate";
$batchRequest = [
"requests" => [
[
"image" => [
"source" => [
"imageUri" => "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
]
],
"features" => [
[
"type" => "VEHICLE_DETECTION"
],
[
"type" => "LICENSE_PLATE_DETECTION"
]
]
]
]
];
$post = array(
'http' => array(
'method' => 'POST',
'content' => json_encode($batchRequest),
'header'=> "Content-Type: application/json\r\n" .
"Accept: application/json\r\n"
"X-API-Key: YOUR-API-KEY", //Add your API key here
)
);
$context = stream_context_create($post);
$result = file_get_contents($apiUrl, false, $context);
$batchResponse = json_decode($result);
print 'detected ' .
count($batchResponse->{'responses'}[0]->{'vehicleAnnotations'}) . ' vehicles and ' .
count($batchResponse->{'responses'}[0]->{'licenseplateAnnotations'}) . ' license plates' .
PHP_EOL;
?>
import requests
apiUrl = "https://preview.sighthoundapi.com/v11/images:annotate"
batchRequest = {
"requests": [
{
"image": {
"source": {
"imageUri": "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
}
},
"features": [
{
"type": "VEHICLE_DETECTION"
},
{
"type": "LICENSE_PLATE_DETECTION"
}
]
}
]
}
headers = {'X-API-Key': 'YOUR-API-KEY'} //Add your API key here
batchResponse = requests.post(apiUrl, json=batchRequest, headers=headers).json()
response = batchResponse['responses'][0]
print('detected %r vehicles and %r license plates' %(
len(response['vehicleAnnotations']),
len(response['licenseplateAnnotations'])
))
require 'json'
require 'net/http'
require 'uri'
apiUrl = 'https://preview.sighthoundapi.com/v11/images:annotate'
batchRequest = {
requests: [
{
image: {
source: {
imageUri: 'https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg'
}
},
features: [
{
type: 'VEHICLE_DETECTION'
},
{
type: 'LICENSE_PLATE_DETECTION'
}
]
}
]
}
uri = URI(apiUrl)
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Post.new(uri.request_uri, 'Content-Type' => 'application/json')
request.add_field('X-API-Key', 'YOUR-API-KEY') # Add your API key here
request.body = batchRequest.to_json
response = http.request(request)
batchResponse = JSON.parse(response.body)
vehicleCount = batchResponse['responses'][0]['vehicleAnnotations'].length
licenseplateCount = batchResponse['responses'][0]['licenseplateAnnotations'].length
puts "detected #{vehicleCount} vehicles and #{licenseplateCount} license plates"
import Foundation
let done = DispatchSemaphore(value: 0)
let apiUrl = URL(string: "https://preview.sighthoundapi.com/v11/images:annotate")!
let batchRequest: [String: Any] = [
"requests": [
[
"image": [
"source": [
"imageUri": "https://d1mfcqjbhp6mmy.cloudfront.net/vehicles/audi-sports-car-r8-marlene.jpeg"
]
],
"features": [
[
"type": "VEHICLE_DETECTION"
],
[
"type": "LICENSE_PLATE_DETECTION"
]
]
]
]
]
let batchRequestJson = try? JSONSerialization.data(withJSONObject: batchRequest)
var httpRequest = URLRequest(url: apiUrl)
httpRequest.httpMethod = "POST"
httpRequest.httpBody = batchRequestJson;
httpRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
httpRequest.setValue("application/json", forHTTPHeaderField: "Accept")
httpRequest.setValue("YOUR-API-KEY", forHTTPHeaderField: "X-API-Key") //Add your API key here
let task = URLSession.shared.dataTask(with: httpRequest) { (data: Data?, httpResponse, error) in
guard let data = data, error == nil else {
print(error?.localizedDescription ?? "unknown error")
return
}
let batchResponseJson = try? JSONSerialization.jsonObject(with: data, options: [])
let batchResponse = batchResponseJson as? [String: Any]
let responses = batchResponse!["responses"] as? [[String: [[String: Any]]]]
let response = responses![0]
print("detected \(response["vehicleAnnotations"]!.count) vehicles and \(response["licenseplateAnnotations"]!.count) license plates")
done.signal()
}
task.resume()
done.wait()
Response
{
"responses": [
{
"licenseplateAnnotations": [
{
"string": {
"value": "RTBB221",
"score": 0.86
},
"region": {
"value": "Germany",
"score": 0.86
},
"boundingPoly": {
"vertices": [
{
"x": 620,
"y": 450
},
{
"x": 738,
"y": 450
},
{
"x": 738,
"y": 478
},
{
"x": 620,
"y": 478
}
],
"normalizedVertices": [
{
"x": 0.6888888888888889,
"y": 0.7258064516129032
},
{
"x": 0.82,
"y": 0.7258064516129032
},
{
"x": 0.82,
"y": 0.7709677419354839
},
{
"x": 0.6888888888888889,
"y": 0.7709677419354839
}
]
},
"locale": "en-US",
"score": 0.86,
"mid": "/m/01jfm_",
"description": "License plate"
}
],
"vehicleAnnotations": [
{
"make": {
"value": "audi",
"score": 0.94
},
"model": {
"value": "r8",
"score": 0.94
},
"generation": {
"value": {
"start": 2007,
"end": 2014
},
"score": 0.94
},
"color": {
"value": "white",
"score": 0.94
},
"licenseplate": {
"$ref": "#/responses/0/licenseplateAnnotations/0"
},
"boundingPoly": {
"vertices": [
{
"x": 428,
"y": 287
},
{
"x": 833,
"y": 287
},
{
"x": 833,
"y": 556
},
{
"x": 428,
"y": 556
}
],
"normalizedVertices": [
{
"x": 0.47555555555555556,
"y": 0.4629032258064516
},
{
"x": 0.9255555555555556,
"y": 0.4629032258064516
},
{
"x": 0.9255555555555556,
"y": 0.896774193548387
},
{
"x": 0.47555555555555556,
"y": 0.896774193548387
}
]
},
"locale": "en-US",
"score": 0.94,
"mid": "/m/0k4j",
"description": "Car"
}
]
}
]
}