/// <summary>
/// Photo bayan detector method which uses OpenCV. NB: it saves image data to the DB, which is passed to it, if the image is not bayan.
/// </summary>
/// <param name="image">Image to check.</param>
/// <param name="messageData">Message data.</param>
/// <returns>BayanResult object.</returns>
public static BayanResult DetectPhotoBayan(Image image, MessageData messageData)
{
var detector = new ImageFeatureDeteсtor();
var repository = new ImageDataRepository();
var similarityLimit = Settings.Get <float>("similarity");
var descriptors = detector.GetDescriptors(image);
var imagesData = repository.GetForChat(messageData.ChatId);
var tasks = new List <Task <BayanResult> >(imagesData.Count);
var cancellationTokenSource = new CancellationTokenSource();
tasks.AddRange(imagesData.Select(imageData => Task.Factory.StartNew(() =>
{
var result = new BayanResult();
var similarity = detector.GetSimilarity(descriptors, imageData.GetDescriptors());
// Bayan detected
if (similarity >= similarityLimit)
{
result.IsBayan = true;
result.Bayanity = similarity;
result.OriginalImage = imageData;
}
return(result);
}, cancellationTokenSource.Token)));
var totalResult = new BayanResult();
while (tasks.Count > 0)
{
var i = Task.WaitAny(tasks.ToArray());
var taskResult = tasks[i].Result;
if (taskResult.IsBayan)
{
// Cancell all tasks
cancellationTokenSource.Cancel();
totalResult = taskResult;
return(totalResult);
}
tasks.RemoveAt(i);
}
// If is not bayan, save the image data
var newImageData = new ImageData(descriptors)
{
ChatId = messageData.ChatId,
UserId = messageData.UserId,
DateTimeAdded = messageData.DateTimeAdded,
MessageId = messageData.MessageId,
UserFullName = messageData.UserFullName,
UserName = messageData.UserName
};
repository.Insert(newImageData);
return(totalResult);
}
public Guid Insert(ImageData data)
{
return(repo.Insert(data.ToGlobal()));
}