I basically converts pixels into pins. It is ment as an absolute last resort. If I (a blind braille display user) have no idea what an image might contain, I

I basically converts pixels into pins. It is ment as an absolute last resort. If I (a blind braille display user) have no idea what an image might contain, I can use it to get at least a rough idea. And yes, it can scale, invert and trim edges, like the UI might hint at. It uses ImageMagick as a workhorse. In fact, you can easily experiment with what it can do with the "convert" utility from ImageMagick. Specifying .ubrl as output file extension will convert to Unicode Braille.