public async Task SaveImage(RekognizedImage image)
{
using (var client = new AmazonDynamoDBClient(GetCredentials(), Region))
{
var table = Table.LoadTable(client, "Image");
var document = new Document
{
["Hash"] = image.Hash,
["Width"] = image.Width,
["Height"] = image.Height
};
if (image.Faces.Count > 0)
{
var face = image.Faces.First();
document["FaceHeight"] = face.FaceInfo.BoundingBox.Height;
document["FaceWidth"] = face.FaceInfo.BoundingBox.Width;
document["FaceLeft"] = face.FaceInfo.BoundingBox.Left;
document["FaceTop"] = face.FaceInfo.BoundingBox.Top;
}
await table.PutItemAsync(document);
}
}
public async Task <RekognizedImage> RekognizeImage(byte[] imageData)
{
var dataService = new DataService();
var hash = imageData.GetSha1Hash();
var existingImage = await dataService.GetImage(hash);
if (existingImage != null)
{
return(existingImage);
}
var convertedImage = _converterService.GetRekognitionCompatibleImage(imageData);
if (!convertedImage.IsSizeOk())
{
throw new SourceImageContentTooLargeException();
}
if (!convertedImage.AreDimensionsOk())
{
throw new SourceImageDimensionsTooSmallException();
}
var client = new AmazonRekognitionClient(GetCredentials(), Region);
var stream = new MemoryStream(convertedImage.ImageData);
await stream.WriteAsync(convertedImage.ImageData, 0, convertedImage.ImageData.Length);
stream.Seek(0, SeekOrigin.Begin);
var image = new Image {
Bytes = stream
};
var request = new RecognizeCelebritiesRequest {
Image = image
};
var response = await client.RecognizeCelebritiesAsync(request);
var recoknizedImage = new RekognizedImage
{
Width = convertedImage.Width,
Height = convertedImage.Height,
Hash = hash,
Faces = MapResponse(convertedImage, response)
};
await dataService.SaveImage(recoknizedImage);
return(recoknizedImage);
}
