Silhouette Shades How Do I Make A Stencil/silhouette Image Or A Pure Black And White Image Of A Person's Face From A Photograph?

How do I make a stencil/silhouette image or a pure black and white image of a person's face from a photograph? - silhouette shades

Is there a photo editting program that can do that? I do not want any size or gray shade, only in black and white