private static async Task MakePrediction()
{
Console.Write("Prediction Key: ");
var predictionKey = GetKey(Console.ReadLine());
Console.Write("Prediction URL: ");
var predictionUrl = Console.ReadLine();
Console.Write("Image path: ");
var image = Console.ReadLine();
var model = new CustomVisionPrediction(predictionKey, predictionUrl, image);
await model.Predict();
}
public async Task <string> DemoPredictFromUrl(CustomVisionPrediction customVisionPrediction, string id, string model)
{
return(await _customVisionService.DemoPredictFromUrl(customVisionPrediction, id, model));
}
public async Task <string> DemoPredictFromUrl(CustomVisionPrediction customVisionPrediction, string projectId, string publishedName)
{
CustomVisionPredictionClient predictionApi = AuthenticatePrediction(customVisionPrediction.Endpoint, customVisionPrediction.PredictionKey);
Microsoft.Azure.CognitiveServices.Vision.CustomVision.Prediction.Models.ImageUrl predictionUrl = new Microsoft.Azure.CognitiveServices.Vision.CustomVision.Prediction.Models.ImageUrl(customVisionPrediction.ImageUrl);
var predictionResult = await predictionApi.DetectImageUrlAsync(Guid.Parse(projectId), publishedName, predictionUrl);
IList <PredictionModel> predictionsToKeep = new List <PredictionModel>();
// Download the image first
// Set the file metadata
var _path = Path.GetTempPath();
var _startPath = $"{_path}/Images/";
string _fileName = $"{projectId}-demo-original.jpg";
string _fileNamePredicted = $"{projectId}-demo-prediction.jpg";
using (WebClient downloader = new WebClient())
{
downloader.DownloadFile(new Uri(customVisionPrediction.ImageUrl), $"{_startPath}{_fileName}");
}
// Load the image (probably from your stream)
using (var image = System.Drawing.Image.FromFile($"{_startPath}{_fileName}"))
{
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image))
{
System.Drawing.Color customColor = System.Drawing.Color.FromArgb(50, System.Drawing.Color.Green);
using (System.Drawing.Brush br = new System.Drawing.SolidBrush(customColor))
{
// Retrieve only relevant predictions
foreach (var prediction in predictionResult.Predictions)
{
if (prediction.Probability > .6)
{
var Xmin = prediction.BoundingBox.Left * image.Width;
var Ymin = prediction.BoundingBox.Top * image.Height;
var Xmax = prediction.BoundingBox.Width * image.Width;
var Ymax = prediction.BoundingBox.Height * image.Height;
predictionsToKeep.Add(prediction);
// Create a new pen.
System.Drawing.Pen skyBluePen = new System.Drawing.Pen(System.Drawing.Brushes.Lime);
// Set the pen's width.
skyBluePen.Width = 8.0F;
g.DrawRectangle(skyBluePen, (int)Xmin, (int)Ymin, (int)Xmax, (int)Ymax);
}
}
image.Save($"{_startPath}{_fileNamePredicted}");
}
}
}
// Set the blob client
blobClient = InitiateBlobClient();
// Set the container if it doesn't exist
cloudBlobContainer = await FindOrCreateBlob(blobClient, Guid.Parse(projectId));
CloudBlockBlob cloudBlockBlobImage = cloudBlobContainer.GetBlockBlobReference(_fileNamePredicted);
// Check if the file already exits in the blob, if it doesn't, upload it.
bool imageUrl = DoesFileExist(_fileNamePredicted, blobClient, projectId.ToString());
if (!imageUrl)
{
await cloudBlockBlobImage.UploadFromFileAsync($"{_startPath}{_fileNamePredicted}");
}
return(cloudBlockBlobImage.Uri.ToString());
}
