Algorithm for Locating the Vertices of a QR Code and Removing Perspective

Scanning QR Codes from cellular phone cameras has made reading this type of two-dimensional code more accessible. However, QR Code photos may show geometric distortions caused by camera positioning in relation to the image to be read and thereby, resulting in a perspective image. These deformations make it difficult to decode QR Codes and thinking about it, this article proposes an algorithm that, first, finds the vertices of the polygon that delimits the area of a QR Code and from the coordinates of these vertices, the algorithm removes the perspective from the image.