public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "face/FaceDetect")] HttpRequest req, ExecutionContext context,
ILogger log)
{
if (req.Query.ContainsKey("imagePath"))
{
string imagePath = req.Query["imagePath"];
try
{
string filename = Guid.NewGuid().ToString() + ".png";
var destinationPath = System.IO.Path.Combine(Path.GetTempPath(), $"Images");
if (!Directory.Exists(destinationPath))
{
Directory.CreateDirectory(destinationPath);
}
destinationPath = $"{destinationPath}\\";
string localImagePath = $"{destinationPath}{filename}";
WebClient client = new WebClient();
client.DownloadFile(imagePath, localImagePath);
using (Image image = Image.Load(localImagePath))
{
double scale = 1;
double maxdimen = 1200;
if (image.Height > image.Width && image.Height > maxdimen)
{
scale = maxdimen / (double)image.Height;
}
else if (image.Width > image.Height && image.Width > maxdimen)
{
scale = maxdimen / (double)image.Width;
}
image.Mutate(x => x.Resize(Convert.ToInt32(image.Width * scale), Convert.ToInt32(image.Height * scale)));
image.Save(localImagePath);
}
var data = File.ReadAllBytes(localImagePath);
string originalImagePath = string.Empty;
using (MemoryStream stream = new MemoryStream())
{
stream.Write(data, 0, data.Length);
_azureBlobStorageService.Upload(stream, BlobContainers.OriginalPhotos, filename);
originalImagePath = _azureBlobStorageService.GetBlobContainerPath(BlobContainers.OriginalPhotos) + "/" + filename;
}
var faces = _faceService.GetFaces(originalImagePath);
var faceList = new List <Tuple <string, int> >();
using (Image image = Image.Load(localImagePath))
{
string blobContainerPath = _azureBlobStorageService.GetBlobContainerPath(BlobContainers.Faces);
for (int i = 0; i < faces.Count; i++)
{
var face = faces[i];
var rectangle = face.FaceRectangle;
int padding = 10;
int x = rectangle.Left - padding < 0 ? 0 : rectangle.Left - padding;
int y = rectangle.Top - padding < 0 ? 0 : rectangle.Top - padding;
int width = (rectangle.Left + rectangle.Width) + padding > image.Width ? image.Width : rectangle.Width + padding;
int height = (rectangle.Top + rectangle.Height) + padding > image.Height ? image.Height : rectangle.Height + padding;
using (var copy = image.Clone(img => img.Crop(new Rectangle(x, y, width, height))))
{
copy.Mutate(x => x.Resize(100, 100));
using (MemoryStream stream = new MemoryStream())
{
copy.SaveAsPng(stream);
stream.Seek(0, SeekOrigin.Begin);
string faceFilename = $"{i}_{filename}";
_azureBlobStorageService.Upload(stream, BlobContainers.Faces, faceFilename);
faceList.Add(new Tuple <string, int>($"{blobContainerPath}/{faceFilename}", width));
}
}
}
}
faceList = faceList.OrderBy(x => x.Item2).ToList();
File.Delete(localImagePath);
return(new OkObjectResult(new FaceDetectResponseModel()
{
OriginalImage = originalImagePath,
Faces = faceList.Select(x => x.Item1).ToList()
}));
}
catch (Exception ex)
{
return(new BadRequestErrorMessageResult(ex.InnerException.Message));
}
}
return(new NoContentResult());
}