Coding depth perception from image defocus
نویسندگان
چکیده
منابع مشابه
Coding depth perception from image defocus
As a result of the spider experiments in Nagata et al. (2012), it was hypothesized that the depth perception mechanisms of these animals should be based on how much images are defocused. In the present paper, assuming that relative chromatic aberrations or blur radii values are known, we develop a formulation relating the values of these cues to the actual depth distance. Taking into account th...
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The principal eyes of jumping spiders have a unique retina with four tiered photoreceptor layers, on each of which light of different wavelengths is focused by a lens with appreciable chromatic aberration. We found that all photoreceptors in both the deepest and second-deepest layers contain a green-sensitive visual pigment, although green light is only focused on the deepest layer. This mismat...
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The 3D reconstruction of a scene with 2D images requires several scene acquisitions or the use of specific lighting (structured light). The solution choice depends on the scene to be reconstructed. Unfortunately in the case of face reconstruction, health standards forbid the use of structured light; the elaboration of a multi-sensor system, such as stereovision is then required. In this paper, ...
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In this paper we present a performance model for depth estimation using single image depth from defocus (SIDFD). Our model is based on an original expression of the Cramér-Rao bound (CRB) in this context. We show that this model is consistent with the expected behavior of SIDFD. We then study the influence on the performance of the optical parameters of a conventional camera such as the focal l...
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We propose a novel variational approach to the depth–from–defocus problem. The quality of such methods strongly depends on the modelling of the image formation (forward operator) that connects depth with out–of–focus blur. Therefore, we discuss different image formation models and design a forward operator that preserves essential physical properties such as a maximum–minimum principle for the ...
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ژورنال
عنوان ژورنال: Vision Research
سال: 2014
ISSN: 0042-6989
DOI: 10.1016/j.visres.2014.10.022