public async Task <IActionResult> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "ocr/ReadText")] 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);
var textValue = _ocrService.GetText(data);
File.Delete(localImagePath);
return(new OkObjectResult(new ImageToTextResponseModel()
{
TextValue = textValue
}));
}
catch (Exception ex)
{
return(new BadRequestErrorMessageResult(ex.InnerException.Message));
}
}
return(new NoContentResult());
}
public async Task GetTextCommandDelegate()
{
// Verificamos si la imagen cumple con las características necesarias para ser procesada.
// Las dimensiones soportadas son desde 40 a 2600 pixels.
if (_bitmap.PixelHeight < MinHeight ||
_bitmap.PixelHeight > MaxHeight ||
_bitmap.PixelWidth < MinWidth ||
_bitmap.PixelWidth > MaxHeight)
{
await _dialogService.ShowAsync("Imagen inválida", "La imagen no esta dentro del tamaño soportado.");
}
else
{
Text = await _ocrService.GetText(_bitmap);
}
}