create equations from lines in image in python 2.7

Question

What python library would be useful in creating an equation from an image of straight edges. Something that would take an image, divide it up into a xy grid, recognize that there is a straight line and find the linear equation of that line with respect to the xy grid.

What I plan to do is detect the two sides of a rectangular shape and calculate the equations of the perpendicular lines. I don't need any code but the names of some relevant imaging libraries would be helpful.

Answer 1

You could look at OpenCV's Cascade Qualifier. It is a C library, runs on most platforms, has a python interface and can be used to detect different shapes. I believe it is what many websites use to detect faces in photos. I had looked into it as a way of automatically generating 3d building models from photos.