static VisionAPIRequest BuildPayload(string base64)
{
Feature webDetect = new Feature {
type = "WEB_DETECTION"
};
Feature safeDetect = new Feature {
type = "SAFE_SEARCH_DETECTION"
};
Feature labelDetect = new Feature {
type = "LABEL_DETECTION"
};
Feature faceDetect = new Feature {
type = "FACE_DETECTION"
};
Image image = new Image {
content = base64
};
Request request = new Request
{
features = new Feature[] { webDetect, safeDetect, labelDetect, faceDetect },
image = image
};
VisionAPIRequest apiRequest = new VisionAPIRequest();
apiRequest.requests = new Request[] { request };
return(apiRequest);
}
private List <string> detectObjects(string base64image)
{
var imageParts = base64image.Split(',').ToList <string>();
VisionAPIRequest visionAPIRequest = new VisionAPIRequest()
{
requests = new List <requests>()
{
new requests()
{
image = new image()
{
content = imageParts[1]
},
features = new List <features>()
{
new features()
{
type = FEATURE_TYPE,
maxResults = 5
}
}
}
}
};
String visionAPIReqStr = JsonConvert.SerializeObject(visionAPIRequest);
String apiKey = System.IO.File.ReadAllText("VisionAPIKey.txt");
String domain = "vision.googleapis.com";
String endpoint = "v1/images:annotate";
String visionAPIRespStr = this.callPostAPI(visionAPIReqStr, domain, endpoint, apiKey, "key");
JSchema visionAPISchema = JSchema.Parse(System.IO.File.ReadAllText("VisionAPISchema.json"));
JObject visionAPIRespObj = JObject.Parse(visionAPIRespStr);
List <string> objects = new List <string>();
IList <string> validationEvents = new List <string>();
if (visionAPIRespObj.IsValid(visionAPISchema, out validationEvents))
{
if (!String.IsNullOrEmpty(visionAPIRespStr))
{
VisionAPI.Objects objectAnnotationResponse = VisionAPI.Objects.FromJson(visionAPIRespStr);
foreach (VisionAPI.Response responses in objectAnnotationResponse.Responses)
{
foreach (VisionAPI.LocalizedObjectAnnotation localizedObject in responses.LocalizedObjectAnnotations)
{
if (!objects.Contains(localizedObject.Name))
{
objects.Add(localizedObject.Name);
}
}
}
}
}
return(objects);
}
static string CallVisionAPI(string url, string base64)
{
var request = (HttpWebRequest)WebRequest.Create(url);
VisionAPIRequest request2 = BuildPayload(base64);
byte[] data = Encoding.ASCII.GetBytes(JObject.FromObject(request2).ToString());
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = data.Length;
using (var stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
return(new StreamReader(request.GetResponse().GetResponseStream()).ReadToEnd());
}
