title: How to clip a rectangle from a tiff?
body: <p>I have a Winforms Gui in C# that allows a user to draw a rectangle on a display of a tiff and save the position, height, width etc. 
  Basically, what I want to do is take the saved position, height and width of the rectangle and clip that area into a sep. bitmap that can then be passed to sep. method that will just OCR the new clip of the bitmap only.
  What is the best way to do this?</p>