You should be able to copy Atalasoft binary to MemoryStream and read with BitmapSource class.
Something like this. (I have not tested)
var atalaIamge = new AtalaImage(100, 100, PixelFormat.Pixel32bppBgra);
var imageData = atalaIamge.ToByteArray(new PngEncoder())
var image = new BitmapImage();
using (var mem = new MemoryStream(imageData))
{
mem.Position = 0;
image.BeginInit();
image.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
image.CacheOption = BitmapCacheOption.OnLoad;
image.UriSource = null;
image.StreamSource = mem;
image.EndInit();
}
wpfImageControl.Source = image;