public static BitmapSource ShowROI(this BitmapSource source, Rect[] defectRects, int penThick = 3)
{
var brush = Brushes.Red;
NamedNullException.Assert(source, nameof(source));
NamedNullException.Assert(defectRects, nameof(defectRects));
if (defectRects.Length == 0)
{
return(source);
}
var dv = new DrawingVisual();
var dc = dv.RenderOpen();
dc.DrawImage(source, source.FullRect());
foreach (var defect in defectRects)
{
dc.DrawRectangle(null, new Pen(brush, penThick), Rect.Intersect(defect, source.FullRect()));
}
dc.Close();
var renderedBmp = new RenderTargetBitmap(
source.PixelWidth,
source.PixelHeight,
96, 96,
PixelFormats.Default);
renderedBmp.Render(dv);
return(renderedBmp);
}
