/// <summary>
/// Detecting a face function
/// </summary>
/// <param name="byteData"></param>
/// <param name="PersonGroupID"></param>
/// <returns></returns>
public async Task <bool> IdentifyFace(byte[] byteData, string PersonGroupID)
{
try
{
FaceFileModel fileobj = new FaceFileModel() //puts the byte array into a objetc
{
byteDataFile = byteData
};
var file = JsonConvert.SerializeObject(fileobj); //Converts object into JSON
var stringContent = new StringContent(file, UnicodeEncoding.UTF8, "application/json");
string url = $"Face/IdentifyFace/{PersonGroupID}"; //URI to call backend API
HttpResponseMessage response = await APIHelper.ApiClient.PostAsync(url, stringContent); //Does a Post to the backend
var result = response.Content.ReadAsAsync <IdentifyResult[]>(); //puts the response into a result variable
var candidate = result.Result; //gets the cadidate object from the response
var confidence = candidate.First().Candidates.First().Confidence; //puts the cofidence value into a variable
if (confidence > 0.6) //Checking if confidence level exceeds 0.6 (0-1)
{
return(true); //Registered User has been found
}
else
{
return(false); //Unauthorised user found
}
}
catch
{
return(false); //Error so Unauthorised user found
}
}
/// <summary>
/// Calls the backend API to register face
/// </summary>
/// <param name="byteData"></param>
/// <param name="PersonGroupID"></param>
/// <param name="username"></param>
/// <param name="name"></param>
/// <returns></returns>
public async Task <bool> RegisterFace(byte[] byteData, string PersonGroupID, string username, string name)
{
FaceFileModel fileobj = new FaceFileModel() //Puts the byte array into a model
{
byteDataFile = byteData
};
var file = JsonConvert.SerializeObject(fileobj); //that model is converted into a json
var stringContent = new StringContent(file, UnicodeEncoding.UTF8, "application/json");
string url = $"Face/AddFace/{PersonGroupID}/{username}/{name}"; //URI needed to call the backend API
HttpResponseMessage response = await APIHelper.ApiClient.PostAsync(url, stringContent); //Posts the the data needed into the backend and await response
if (response.IsSuccessStatusCode) //Status code is 200
{
return(true); //Face has been successfully registered
}
else
{
return(false); //Returns false if we get anything except for status code 200
}
}
