partial void TappedClear(UIButton sender)
{
// clear the digitview
DigitView.Lines.Clear();
DigitView.SetNeedsDisplay();
PredictionLabel.Hidden = true;
}
partial void TappedDetectDigit(UIButton sender)
{
// get the digitView context so we can get the pixel values from it to intput to network
var context = DigitView.GetViewContext();
// validate NeuralNetwork was initialized properly
if (runningNet == null)
{
throw new InvalidProgramException();
}
// putting input into MTLTexture in the MPSImage
var region = new MTLRegion(new MTLOrigin(0, 0, 0), new MTLSize((nint)mnistInputWidth, mnistInputHeight, 1));
runningNet.SrcImage.Texture.ReplaceRegion(region,
level: 0,
slice: 0,
pixelBytes: context.Data,
bytesPerRow: mnistInputWidth,
bytesPerImage: 0);
// run the network forward pass
var label = runningNet.Forward();
// show the prediction
PredictionLabel.Text = $"{label}";
PredictionLabel.Hidden = false;
}
void ReleaseDesignerOutlets()
{
if (AccuracyLabel != null)
{
AccuracyLabel.Dispose();
AccuracyLabel = null;
}
if (DigitView != null)
{
DigitView.Dispose();
DigitView = null;
}
if (PredictionLabel != null)
{
PredictionLabel.Dispose();
PredictionLabel = null;
}
}
