Not bad. Shows original image on left and binarized image on right. Binarized image changes as you interactively set the low and high threshold limits. Button for a popup window with the binary image applied to the original image. Handles color images after you select a color band (which they call "Scale" for some reason) to work with. A little bit clunky and could use several user interface improvements (e.g. there is no way to interactively browse for an image file), but it's a good starting point for you to use to build something like this into your own application.