async void DetectButton_Click(object sender, EventArgs e)
{
// filter the background
filterPictureBox.Image = await Task.Run(() => autoCrop.FilterBackGround(autoCrop.ImageData as Bitmap));
// detect the edges of the cropping area.
var rectangle = autoCrop.DetectEdges(filterPictureBox.Image as Bitmap);
// show the result if we have one
if (!rectangle.IsEmpty)
{
resultPictureBox.Image = autoCrop.TryCrop(autoCrop.ImageData as Bitmap, rectangle);
saveMenuItem.Enabled = true;
}
infoLabel.Text = $"{rectangle.Width} x {rectangle.Height}";
}
