METHOD AND DEVICE FOR RECTIFYING IMAGE PHOTOGRAPHED BY FISH-EYE LENS

摘要

A method and device for rectifying an image photographed by a fish-eye lens, comprising the following steps: acquiring a fish-eye lens mapping parameter and a lens field angle (110); acquiring a fitted mapping curve according to the lens mapping parameter (120); acquiring centre coordinate and the radius of a fish-eye circle in a fish-eye image (130); creating a blank image used for rectifying the image according to the lens field angle (140); based on the lens field angle, the fitted mapping curve, the centre coordinate and the radius of the fish-eye circle, and the width and height of the blank image, mapping a point on the blank image used for rectifying the image to a corresponding point in the fish-eye image (150); and based on a colour sample of the corresponding point in the fish-eye image, drawing same onto the corresponding point in the blank image used for rectifying the image, and drawing the rectified image (160). According to the device and method, rectification is performed on an image photographed by a fish-eye lens so as to form an image with higher precision and further form a panorama image with higher precision.