Parallax Image Stitching: A Summary of Classical and Innovative Algorithms

Image stitching is the process that can create a broad visual image by combining angular differences images. Stitching results are typically generated in two steps: (i) aligning images employing image registration to provide preliminary stitched images with a wide field and (ii) optimizing the preliminary stitched images by image blending, which can unify brightness and color differences and eliminate the stitching seams. In addition, to enhance stability and generalization, the image stitching algorithm primarily applies the natural image as an input. This paper focuses on the process of stitching for natural images with parallax, summarizes the image stitching algorithm from the critical steps, including image registration and image blending, and discusses its merits and limitations.