public RecognizerPageViewModel(string targetPath, string scenePath) { TargetImage = ImageSource.FromFile(targetPath); SceneImage = ImageSource.FromFile(scenePath); ImageRecogImpl.TargetImagePath = targetPath; ImageRecogImpl.SceneImagePath = scenePath; ImageRecogImpl.Decode(); SetTargetCommand = new Command(() => ReadyToRecognize(ImageRecogImpl.FillTarget())); RecognizeCommand = new Command(async() => RefreshPage(await ImageRecogImpl.Recognize()), () => ImageRecogImpl.IsTargetFilled); }