Maps of the acute zones of fly eyes

Land, M. F.; Eckert, H

doi:10.1007/bf00613976

Cited by 133 publications

(137 citation statements)

References 35 publications

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“…Therefore, the region of binocular overlap in the frontal visual ®eld is not appreciated in its complete extent (cf. Beersma et al 1977;Land and Eckert 1985). Nevertheless, optical axes of ommatidia residing in the frontal to dorsofrontal part of the eye are clearly directed towards the contralateral left visual ®eld.…”

Section: The Map Of Optical Axesmentioning

confidence: 97%

“…The orientations of the ommatidial rows of the eye lattice of di erent¯y species were found to change over the eye in a characteristic way (Beersma et al 1975;data of Franceschini in Hausen 1981;Land and Eckert 1985). The organization of the eye's lattice has been related to the local preferred directions of motion sensitive wide®eld neurons (McCann and Forster 1971) for the ®rst time by Beersma et al (1975) in the house¯y Musca.…”

Section: Introductionmentioning

confidence: 99%

“…Firm conclusions in this regard are not even possible, so far, for the visual system of the blow¯y Calliphora, although there are numerous studies on its eye design and the anatomical and computational properties of its visual motion pathway (e.g., Land and Eckert 1985;Hausen and Egelhaaf 1989;Laughlin 1989;Strausfeld 1989;Egelhaaf and Borst 1993a, b;Egelhaaf and Warzecha 1999;Krapp 1999). In particular, at present no published data on the arrangement of the ommatidial rows of the eye lattice of wild-type female Calliphora are available.…”

Section: Introductionmentioning

confidence: 99%

“…This would be important for establishing quantitatively the optical properties of the eye in relation to to the underlying neuronal machinery, because most analyses of the processing of optic¯ow and its functional signi®cance were done on female wildtype Calliphora. There is only a study by Land and Eckert (1985) on Calliphora and Lucilia of either sex using a white-eyed mutant. This mutant allows one to determine more easily than is possible in wild-type animals the orientation of the optical axes of the ommatidia, but it is not clear whether the mutation only a ects the pigment of the eye.…”

Section: Introductionmentioning

confidence: 99%

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Arrangement of optical axes and spatial resolution in the compound eye of the female blowfly Calliphora

Petrowitz

Dahmen²,

Egelhaaf

et al. 2000

J Comp Physiol A

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We determined the optical axes of ommatidia in the wild-type female blow¯y Calliphora by inspecting the deep pseudopupil in large parts of the compound eye. The resulting map of optical axes allowed us to evaluate the spatial resolution in di erent parts of the eye in terms of interommatidial angles as well as the density of optical axes, and to estimate the orientation of ommatidial rows along the hexagonal eye lattice. The optical axes are not homogeneously distributed over the eye. In the frontal visual ®eld the spatial resolution is about two times higher than in its lateral part and about three times higher as compared to the eye's dorsal pole region. The orientation of the ommatidial rows along the eye lattice is not the same for di erent regions of the eye but changes in a characteristic way. The inter-individual variability in the orientation of the ommatidial rows is estimated to be smaller than 8°. The characteristic arrangement of the ommatidial lattice is discussed as an adaptation for e cient evaluation of optic¯ow as induced during self-motions of the animal.

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Section: The Map Of Optical Axesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Arrangement of optical axes and spatial resolution in the compound eye of the female blowfly Calliphora

Petrowitz

Dahmen²,

Egelhaaf

et al. 2000

J Comp Physiol A

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“…To achieve a large FOV the camera system was equipped with a fisheye lens covering a solid angle of approximately 2π sr, i.e., half of the unit sphere. The highest spatial resolution found in Calliphora amounts to inter-ommatidial angles of ϕ = 1.07 • (Land and Eckert 1985) and is reached in the frontal visual field (Petrowitz et al 2000). Thus, to obtain a spatial resolution better than 1 • per pixel in the frontal part while using a 185 • fisheye lens the sensor system had to have a resolution of at least 185 × 185 pixels.…”

Section: Requirements and Restrictionsmentioning

confidence: 99%

Bio-inspired visual ego-rotation sensor for MAVs

et al. 2012

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Flies are capable of extraordinary flight maneuvers at very high speeds largely due to their highly elaborate visual system. In this work we present a fly-inspired FPGA based sensor system able to visually sense rotations around different body axes, for use on board micro aerial vehicles (MAVs). Rotation sensing is performed analogously to the fly's VS cell network using zero-crossing detection. An additional key feature of our system is the ease of adding new functionalities akin to the different tasks attributed to the fly's lobula plate tangential cell network, such as object avoidance or collision detection. Our implementation consists of a modified eneo SC-MVC01 SmartCam module and a custom built circuit board, weighing less than 200 g and consuming less than 4 W while featuring 57,600 individual two-dimensional elementary motion detectors, a 185 • field of view and a frame rate of 350 frames per second. This makes our sensor system compact in terms of size, weight and power requirements for easy incorporation into MAV platforms, while autonomously performing all sensing and processing on-board and in real time.

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Comparative Psychology of Vision

Jacobs

2003

Handbook of Psychology

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Light provides a very rich source of information that many animals can use in the guidance and control behavior. Considerable progress has been made in understanding how this comes about through the comparison of visual capacities and visual biology across widely variant species. This chapter summarizes that progress by first considering some basic features of eyes and examining how these features can be exploited to allow vision in different photic environments. Comments are then offered on the means that have been developed for assessing animal vision and on the challenges inherent in inferring visual capacity from anatomy and physiology. Finally, a range of examples are offered as to how animals solve three visual problems: detecting change in the photic environment, resolving spatial structure, and exploiting chromatic cues.

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Maps of the acute zones of fly eyes

Cited by 133 publications

References 35 publications

Arrangement of optical axes and spatial resolution in the compound eye of the female blowfly Calliphora

Arrangement of optical axes and spatial resolution in the compound eye of the female blowfly Calliphora

Bio-inspired visual ego-rotation sensor for MAVs

Comparative Psychology of Vision

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