title: Find rectangles without corners using opencv
body: <p>I have an image where I want to find contours but the "contours" in my image don't have corners.  Are there some tricks I can use to help find the rectangles that are implied by the lines in this image?  I thought about extending all the lines to form the corners but I worry about lines intersecting from other contours and how to determine which intersections I'm interested in.  I'm very new to opencv and I don't know much about image processing.  Thank you for any help you can give.
  <img src="https://i.stack.imgur.com/ec4da.png" alt="alt text"></p>