Treue, Stefan

[["dc.bibliographiccitation.firstpage","117"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Vision Research"],["dc.bibliographiccitation.lastpage","137"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Hildreth, Ellen C."],["dc.contributor.author","Ando, Hiroshi"],["dc.contributor.author","Andersen, Richard A."],["dc.contributor.author","Treue, Stefan"],["dc.date.accessioned","2009-03-14T16:05:27Z"],["dc.date.accessioned","2021-10-27T13:12:58Z"],["dc.date.available","2009-03-14T16:05:27Z"],["dc.date.available","2021-10-27T13:12:58Z"],["dc.date.issued","1995"],["dc.description.abstract","This paper addresses the computational role that the construction of a complete surface representation may play in the recovery of 3-D structure from motion. We first discuss the need to integrate surface reconstruction with the structure-from-motion process, both on computational and perceptual grounds. We then present a model that combines a feature-based structure-from-motion algorithm with a smooth surface interpolation mechanism. This model allows multiple surfaces to be represented in a given viewing direction, incorporates constraints on surface structure from object boundaries, and segregates image features onto multiple surfaces on the basis of their 2-D image motion. We present the results of computer simulations that relate the qualitative behavior of this model to psychophysical observations. In a companion paper, we discuss further perceptual observations regarding the possible role of surface reconstruction in the human recovery of 3-D structure from motion."],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1016/0042-6989(94)E0068-V"],["dc.identifier.pmid","7839602"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3238"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91739"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","final"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","three-dimensional structure-from-motion; motion perception; surface reconstruction; motion interpretation; temporal integration"],["dc.subject.ddc","599"],["dc.subject.ddc","599.8"],["dc.title","Recovering three-dimensional structure from motion with surface reconstruction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","389"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Experimental Brain Research"],["dc.bibliographiccitation.lastpage","400"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Snowden, Robert J."],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Andersen, Richard A."],["dc.date.accessioned","2009-03-12T21:20:26Z"],["dc.date.accessioned","2021-10-27T13:12:57Z"],["dc.date.available","2009-03-12T21:20:26Z"],["dc.date.available","2021-10-27T13:12:57Z"],["dc.date.issued","1992"],["dc.description.abstract","We studied the response of single units to moving random dot patterns in areas V1 and MT of the alert macaque monkey. Most cells could be driven by such patterns; however, many cells in V1 did not give a consistent response but fired at a particular point during stimulus presentation. Thus different dot patterns can produce a markedly different response at any particular time, though the time averaged response is similar. A comparison of the directionality of cells in both V1 and MT using random dot patterns shows the cells of MT to be far more directional. In addition our estimates of the percentage of directional cells in both areas are consistent with previous reports using other stimuli. However, we failed to find a bimodality of directionality in V1 which has been reported in some other studies. The variance associated with response was determined for individual cells. In both areas the variance was found to be approximately equal to the mean response, indicating little difference between extrastriate and striate cortex. These estimates are in broad agreement (though the variance appears a little lower) with those of V1 cells of the anesthetized cat. The response of MT cells was simulated on a computer from the estimates derived from the single unit recordings. While the direction tuning of MT cells is quite wide (mean half-width at half-height approximately 50°) it is shown that the cells can reliably discriminate much smaller changes in direction, and the performance of the cells with the smallest discriminanda were comparable to thresholds measured with human subjects using the same stimuli (approximately 1.1°). Minimum discriminanda for individual cells occurred not at the preferred direction, that is, the peak of their tuning curves, but rather on the steep flanks of their tuning curves. This result suggests that the cells which may mediate the discrimination of motion direction may not be the cells most sensitive to that direction."],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1007/BF02259114"],["dc.identifier.gro","3151582"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3236"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91737"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.relation.issn","0014-4819"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","599"],["dc.subject.ddc","599.8"],["dc.title","The response of neurons in areas V1 and MT of the alert rhesus monkey to moving random dot patterns"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","797"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Visual Neuroscience"],["dc.bibliographiccitation.lastpage","804"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Andersen, Richard A."],["dc.date.accessioned","2009-03-14T16:28:38Z"],["dc.date.accessioned","2021-10-27T13:12:56Z"],["dc.date.available","2009-03-14T16:28:38Z"],["dc.date.available","2021-10-27T13:12:56Z"],["dc.date.issued","1996"],["dc.description.abstract","Visual motion, i.e. the pattern of changes on the retinae caused by the motion of objects or the observer through the environment, contains important cues for the accurate perception of the three-dimensional layout of the visual scene. In this study, we investigate if neurons in the visual system, specifically in area MT of the macaque monkey, are able to differentiate between various velocity gradients. Our stimuli were random dot patterns designed to eliminate stimulus variables other than the orientation of a velocity gradient. We develop a stimulus space (\"deformation space\") that allows us to easily parameterize our stimuli. We demonstrate that a substantial proportion of MT cells show tuned responses to our various velocity gradients, often exceeding the response evoked by an optimized flat velocity profile. This suggests that MT cells are able to represent complex aspects of the visual environment and that their properties make them well suited as building blocks for the complex receptive field properties encountered in higher areas, such as area MST to which many cells in area MT project."],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1017/S095252380000866X"],["dc.identifier.pmid","8870234"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3240"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91736"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","final"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","MT; velocity gradients; structure from motion; optical flow; surfaces"],["dc.subject.ddc","599"],["dc.subject.ddc","599.8"],["dc.title","Neural responses to velocity gradients in macaque cortical area MT"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","139"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Vision Research"],["dc.bibliographiccitation.lastpage","148"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Andersen, Richard A."],["dc.contributor.author","Ando, Hiroshi"],["dc.contributor.author","Hildreth, Ellen C."],["dc.date.accessioned","2009-03-14T16:09:48Z"],["dc.date.accessioned","2021-10-27T13:12:58Z"],["dc.date.available","2009-03-14T16:09:48Z"],["dc.date.available","2021-10-27T13:12:58Z"],["dc.date.issued","1995"],["dc.description.abstract","Dynamic random-dot displays representing a rotating cylinder were used to investigate surface interpolation in the perception of structure-from-motion (SFM) in humans. Surface interpolation refers to a process in which a complete surface in depth is reconstructed from the object depth values extracted at the stimulus features. Surface interpolation will assign depth values even in parts of the object that contain no features. Such a “fill-in” process should make the detection of featureless stimulus areas (“holes”) difficult. Indeed, we demonstrate that such holes in our rotating cylinder can be as wide as one-quarter of the stimulus before subjects can reliably detect their presence. Subjects were presented with a variation on the rotating cylinder in which all dots were oscillating either in synchrony or asynchronously. Subjects perceive a rigidly rotating cylinder even when such a percept is not in agreement with the physical stimulus. To reconcile this discrepancy between actual and perceived stimulus we propose that individual points contribute to a surface based object representation and that in this process the visual system looses access to the identity of the individual features that make up the surface. Finally we are able to explain a variety of previously documented perceptual peculiarities in the perception of structure-from-motion by arguing that the perceptual interpretation of the object's boundaries influences the surface interpolation process. These findings offer strong perceptual evidence for a process of surface interpolation and are also physiologically plausible given results from recordings in awake behaving monkey cortical areas V1 and MT. The companion paper demonstrates how such a surface interpolation process can be incorporated into a structure-from-motion algorithm and how object boundaries can influence the perception of structure-from-motion as has been demonstrated before and in this paper."],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1016/0042-6989(94)E0069-W"],["dc.identifier.gro","3151608"],["dc.identifier.pmid","7839603"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3239"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91740"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0042-6989"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","599"],["dc.subject.ddc","599.8"],["dc.title","Structure-from-motion: Perceptual evidence for surface interpolation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","59"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Vision Research"],["dc.bibliographiccitation.lastpage","75"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Husain, Masud"],["dc.contributor.author","Andersen, Richard A."],["dc.date.accessioned","2009-03-03T07:28:07Z"],["dc.date.accessioned","2021-10-27T13:12:56Z"],["dc.date.available","2009-03-03T07:28:07Z"],["dc.date.available","2021-10-27T13:12:56Z"],["dc.date.issued","1991"],["dc.description.abstract","Novel dynamic random-dot displays representing a rotating cylinder or a noise-field were used to investigate the perception of structure from motion (SFM) in humans. The finite lifetimes of the points allowed the study of spatiotemporal characteristics with smoothly moving stimuli. In one set of experiments subjects had to detect the change from the unstructured motion to the appearance of the cylinder in a reaction time task. In another set of experiments subjects had to distinguish these two stimuli in a two-alternative forced-choice task. The two major findings were:(1) a relatively constant point lifetime threshold (50–85 msec) for perceiving structure from motion. This threshold is similar to the threshold for estimating velocity and suggests that velocity measurements are used to process SFM;(2) long reaction times for detecting structure (∼ 1 sec). The build-up of performance with time and with increasing numbers of points reflects a process of temporal and spatial integration. We propose that this integration is achieved through the generation of a surface representation of the object. Information from single features on the object appears to be used to interpolate a surface between these local measurements allowing the system to improve perception over extended periods of time even though each feature is present only brieflly. Selective masking of the stimulus produced characteristic impairments which suggest that both velocity measurements and surface interpolation are global processes."],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1016/0042-6989(91)90074-F"],["dc.identifier.gro","3151600"],["dc.identifier.pmid","2006555"],["dc.identifier.ppn","514567465"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3200"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91735"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0042-6989"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","599"],["dc.subject.ddc","599.8"],["dc.title","Human perception of structure from motion"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]