A Note on the Depth-from-Defocus Mechanism of Jumping Spiders
AbstractJumping spiders are capable of estimating the distance to their prey relying only on the information from one of their main eyes. Recently, it has been shown that jumping spiders perform this estimation based on image defocus cues. In order to gain insight into the mechanisms involved in this blur-to-distance mapping as performed by the spider and to judge whether inspirations can be drawn from spider vision for depth-from-defocus computer vision algorithms, we constructed a three-dimensional (3D) model of the anterior median eye of the Metaphidippus aeneolus, a well studied species of jumping spider. We were able to study images of the environment as the spider would see them and to measure the performances of a well known depth-from-defocus algorithm on this dataset. We found that the algorithm performs best when using images that are averaged over the considerable thickness of the spider’s receptor layers, thus pointing towards a possible functional role of the receptor thickness for the spider’s depth estimation capabilities. View Full-Text
Externally hosted supplementary file 1
Description: Supplementary material containing a Blender model of the spider eye, input images, resulting images as seen through the eye and analysis scripts.
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Nolte, A.; Hennes, D.; Izzo, D.; Blum, C.; Hafner, V.V.; Gheysens, T. A Note on the Depth-from-Defocus Mechanism of Jumping Spiders. Biomimetics 2017, 2, 3.
Nolte A, Hennes D, Izzo D, Blum C, Hafner VV, Gheysens T. A Note on the Depth-from-Defocus Mechanism of Jumping Spiders. Biomimetics. 2017; 2(1):3.Chicago/Turabian Style
Nolte, Aleke; Hennes, Daniel; Izzo, Dario; Blum, Christian; Hafner, Verena V.; Gheysens, Tom. 2017. "A Note on the Depth-from-Defocus Mechanism of Jumping Spiders." Biomimetics 2, no. 1: 3.
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