private List <FaceDetail> FilterFaces(List <FaceDetail> faceDetails, RecognitionRequest request)
{
if (faceDetails == null)
{
return(faceDetails);
}
var results = faceDetails;
if (request.Age.HasValue)
{
results = results.Where(f =>
f.AgeRange?.High >= (request.Age.Value + _ageBuffer) &&
f.AgeRange?.Low <= (Math.Max(0, request.Age.Value + _ageBuffer))).ToList();
}
if (request.IsMale.HasValue)
{
var genderType = request.IsMale.Value ? GenderType.Male : GenderType.Female;
results = results.Where(f =>
f?.Gender?.Value == genderType && f?.Gender?.Confidence >= _confidenceRequired).ToList();
}
if (request.IsSmiling.HasValue)
{
results = results.Where(f =>
f?.Smile?.Value == request.IsSmiling.Value && f?.Smile?.Confidence >= _confidenceRequired).ToList();
}
return(results);
}
public async Task TraverseFor(Settings settings)
{
var request = new ListObjectsRequest()
{
BucketName = settings.BucketName,
Prefix = settings.SourcePrefix
};
var objects = new List <Amazon.S3.Model.S3Object>();
var response = await _s3Client.ListObjectsAsync(request);
objects.AddRange(response.S3Objects);
while (response.IsTruncated)
{
request.Marker = response.NextMarker;
response = await _s3Client.ListObjectsAsync(request);
objects.AddRange(response.S3Objects);
}
foreach (var s3Object in objects)
{
var extension = s3Object.Key.Substring(s3Object.Key.LastIndexOf(".") + 1);
if (!_acceptedExtensions.Any(x => x.Equals(extension, StringComparison.InvariantCultureIgnoreCase)))
{
continue;
}
var recognitionRequest = new RecognitionRequest()
{
Age = settings.Age,
IsSmiling = settings.IsSmiling,
IsMale = settings.IsMale
};
var result = await _faceRecogniser.Recognise(settings.BucketName, s3Object.Key, recognitionRequest);
if (result.IsFound)
{
await _objectUploader.UploadObjectAsync(settings.BucketName, s3Object.Key, $"{settings.DestinationPrefix}/{s3Object.Key.GetFileFromKey()}");
}
}
}
public async Task <RecognitionResult> Recognise(string bucketName, string key, RecognitionRequest request)
{
var client = new AmazonRekognitionClient(_configuration.GetSection("AWS:AccessKey").Value.ToString(), _configuration.GetSection("AWS:SecretKey").Value.ToString(), Amazon.RegionEndpoint.APSoutheast2);
var faceResponse = await client.DetectFacesAsync(new DetectFacesRequest
{
Image = new Image
{
S3Object = new Amazon.Rekognition.Model.S3Object
{
Bucket = bucketName,
Name = key
}
},
Attributes = new List <string> {
"ALL"
}
});
List <FaceDetail> faceDetails = faceResponse?.FaceDetails;
if (faceDetails != null)
{
var results = FilterFaces(faceDetails, request);
if (results.Any())
{
Console.WriteLine($"Found at least one person in {key.GetFileFromKey()} meeting the criteria.");
return(new RecognitionResult()
{
IsFound = true,
IsAlone = results.Count() == 1 && faceDetails.Count() == 1
});
}
}
return(new RecognitionResult()
{
IsFound = false,
IsAlone = false
});
}
