/// <summary>
/// Converts the original image into a grayscale
/// </summary>
private Convolution2D GetOriginalImageGrays()
{
if (originalImage.Source == null)
{
return(null);
}
int?limit = null;
int limitInt;
if (chkLimitImageSize.IsChecked.Value && int.TryParse(txtSizeLimit.Text, out limitInt))
{
limit = limitInt;
}
bool shouldBuild = false;
if (_origImageGrays == null)
{
shouldBuild = true;
}
else if (limit != null && (_origImageGrays.Width > limit.Value || _origImageGrays.Height > limit.Value))
{
// The current one is the wrong size
shouldBuild = true;
}
if (shouldBuild)
{
BitmapSource bitmap = (BitmapSource)originalImage.Source;
BitmapCustomCachedBytes colors = null;
if (limit != null)
{
bitmap = UtilityWPF.ResizeImage(bitmap, limit.Value); // this will only resize if it's too big
}
colors = (BitmapCustomCachedBytes)UtilityWPF.ConvertToColorArray(bitmap, false, Colors.Transparent);
_origImageGrays = colors.ToConvolution();
}
return(_origImageGrays);
}
private void TakePicture_Click(object sender, RoutedEventArgs e)
{
try
{
int size;
if (!int.TryParse(txtImageSize.Text, out size))
{
MessageBox.Show("Couldn't parse image size as an integer", this.Title, MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
else if (size < 1)
{
MessageBox.Show("Size must be at least 1", this.Title, MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
if (radColor.IsChecked.Value)
{
// No need to convert in/out of bitmap source
image.Source = UtilityWPF.RenderControl(grdViewPort, size, size, true);
return;
}
// Render the control
BitmapCustomCachedBytes bitmap = null;
if (radGrayTransparent.IsChecked.Value)
{
bitmap = (BitmapCustomCachedBytes)UtilityWPF.RenderControl(grdViewPort, size, size, false, Colors.Transparent, true);
}
else if (radGrayBlack.IsChecked.Value)
{
Brush background = grdViewPort.Background;
grdViewPort.Background = Brushes.Black;
grdViewPort.UpdateLayout();
bitmap = (BitmapCustomCachedBytes)UtilityWPF.RenderControl(grdViewPort, size, size, false, Colors.Black, true);
grdViewPort.Background = background;
}
else
{
throw new ApplicationException("Unknown radio button");
}
// Convert to gray
var colors = bitmap.GetColors_Byte().
Select(o =>
{
byte gray = Convert.ToByte(UtilityWPF.ConvertToGray(o[1], o[2], o[3]));
return(new byte[] { o[0], gray, gray, gray });
}).
ToArray();
// Show it
image.Source = UtilityWPF.GetBitmap(colors, size, size);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), this.Title, MessageBoxButton.OK, MessageBoxImage.Error);
}
}