A Differential Invariant for Zooming
<|reference_start|>A Differential Invariant for Zooming: 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.<|reference_end|>
@article{siebert1999a,
    title={A Differential Invariant for Zooming},
    author={Andreas Siebert},
    journal={Proceedings 1999 International Conference on Image Processing,
  Kobe, 25-28 October 1999},
    year={1999},
    archivePrefix={arXiv},
    eprint={cs/9908017},
    primaryClass={cs.CV}
}