Abstract: Technology is disclosed herein for recognizing and processing planar features in images such as walls of rooms. A method according to the technology receives a digital at a computing device. The computing device recognizes a polygonal region of the digital image corresponding to a planar feature of an object captured in the digital image. The computing device further processes the polygonal region of the digital image according to user instructions. The processed polygonal region of the digital image is visualized on a display of the computing device in real time.