A Differential Invariant for Zooming

Download PDF
Open Webpage

Andreas Siebert

Published: 1999, Last Modified: 21 Feb 2026CoRR 1999EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: This paper presents an invariant under scaling and linear brightness change. The invariant is based on differentials and therefore is a local feature. Rotationally invariant 2-d differential Gaussian operators up to third order are proposed for the implementation of the invariant. The performance is analyzed by simulating a camera zoom-out.