Abstract:
:A novel approach to the question of image segmentation is considered. Instead of relying on edge-detection mechanisms to encircle the image of an object, it is proposed that the general Gestalt-like properties of images of objects can be used. These manifest themselves as particularly simple properties at relatively coarse spatial scales when the image is filtered with orientation-selective filters. The first part of the paper is concerned with a computational analysis of this proposal. A key issue is the question of how the information in filtered images is extracted. A simple primitive parametric description of zero-bounded blobs is used in this paper. It is shown how such a scheme can support readily the clustering of features with Gestalt-like properties. In the second part of the paper, two general difficulties for vision that are particularly severe for the present scheme are considered. The first of these are the effects of strongly asymmetric illumination. The second are the effects of using a cluttered scene. In each case the nature of the problem is examined and the nature of the computational solution considered.
journal_name
Perceptionjournal_title
Perceptionauthors
Watt Rdoi
10.1068/p230383subject
Has Abstractpub_date
1994-01-01 00:00:00pages
383-98issue
4eissn
0301-0066issn
1468-4233journal_volume
23pub_type
杂志文章相关文献
PERCEPTION文献大全abstract::In their seminal study Diamond and Carey (1986, Journal of Experimental Psychology: General 115 107-117) found a larger inversion effect for dog pictures in dog experts than novices, supporting a role of visual expertise in the observation of particularly large inversion effects for faces. However, subsequent studies ...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p6270
更新日期:2010-01-01 00:00:00
abstract::Individual speechreading abilities have been linked with a range of cognitive and language-processing factors. The role of specifically visual abilities in relation to the processing of visible speech is less studied. Here we report that the detection of coherent visible motion in random-dot kinematogram displays is r...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p5211
更新日期:2005-01-01 00:00:00
abstract::We identified the graphical perceptual information needs of older adults (≥60 years of age) through a set of psychophysical experiments on bar, stacked, and pie charts. The results are compared with those of a general population (<60 years of age). We conducted the experiments as online remote studies with 202 total p...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p7801
更新日期:2014-01-01 00:00:00
abstract::Bilateral symmetry is important in many perceptual analyses from low-level figure-ground segmentation to higher-level face and object perception. Despite the success of low-level, image-based symmetry-detection models, these may not provide a complete account of symmetry perception. Better symmetry detection and stron...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p5688
更新日期:2007-01-01 00:00:00
abstract::A brief history of quantitative assessments of interocular transfer (IOT) of the motion aftereffect (MAE) is presented. Recent research indicates that the MAE occurs as a consequence of adapting detectors for relative rather than retinal motion. When gratings above and below a stationary, fixated grating are moved in ...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p221365
更新日期:1993-01-01 00:00:00
abstract::The tactile counterpart of diplopia has recently been described: tactile diplopia or diplesthesia. The human fingers show a rather precise organization of the cutaneous areas eliciting diplesthesia. In particular, these areas are very extensive between nonadjacent fingers (second and fourth, second and fifth, and thir...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p200687
更新日期:1991-01-01 00:00:00
abstract::A cricket or baseball fielder can run so as to arrive at just the right place at just the right time to catch a ball. It is shown that if the fielder runs so that d2(tan alpha)/dt2 = 0, where alpha is the angle of elevation of gaze from fielder to ball, then the ball will generally be intercepted before it hits the gr...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p221427
更新日期:1993-01-01 00:00:00
abstract::The visual environment is distorted with respect to the physical environment. Luneburg [1947, Mathematical Analysis of Binocular Vision (Princeton, NJ: Princeton University Press)] assumed that visual space could be described by a Riemannian space of constant curvature. Such a space is described by a metric which defi...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p3041
更新日期:2000-01-01 00:00:00
abstract::Adapting to a drifting grating (temporal frequency 4 Hz, contrast 0.4) in the periphery gave rise to a motion aftereffect (MAE) when the grating was stopped. A standard unadapted foveal grating was matched to the apparent velocity of the MAE, and the matching velocity was approximately constant regardless of the visua...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p150603
更新日期:1986-01-01 00:00:00
abstract::Visual acuity for the detection of gratings at four orientations was measured for groups of ten boys and ten girls aged five to seven years, from the following four populations: Scots in Glasgow, Pakistanis in Glasgow, Gaels in Stornoway (Outer Hebrides) and East Anglians in Littleport (Cambridgeshire fenlands). The G...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p080507
更新日期:1979-01-01 00:00:00
abstract::We obtained data on within-channel and between-channel auditory temporal gap-detection acuity in the normal population. Ninety-five normal listeners were tested for gap-detection thresholds, for conditions in which the gap was bounded by spectrally identical, and by spectrally different, acoustic markers. Separate thr...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p5116
更新日期:2004-01-01 00:00:00
abstract::A random-dot chequerboard kinematogram was used to investigate the effect of motion adaptation both on evoked potentials and on motion aftereffects (MAEs). The experimental paradigm used allowed simultaneous measurement of both variables. Each adaptation period was followed by a series of 5 short test stimuli to which...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p231155
更新日期:1994-01-01 00:00:00
abstract::The problem of the origins of the perception of causality in infancy has received relatively little attention in the literature despite its obvious importance. Two experiments with infants 4 1/2 and 8 months old are reported which seek to investigate sensitivity to spatiotemporal continuity in simple causal events wit...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p110173
更新日期:1982-01-01 00:00:00
abstract::It has often been reported that, in the absence of information about the direction of illumination, people interpret surface convexities and concavities in accordance with the assumption that illumination comes from above. However, 'above' could mean with reference to gravity, the head or the retina. Yonas et al repor...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p190523
更新日期:1990-01-01 00:00:00
abstract::When viewing two conflicting stimuli in a stereoscope, males reported seeing objects significantly more often than human figures. The opposite effect was observed in females. ...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p060691
更新日期:1977-01-01 00:00:00
abstract::In prior work from this laboratory, we have examined how accurately subjects can judge collinearity, i.e. alignment, as a function of the angular position of stimulus elements. In those experiments, subjects were presented with a line segment (or a pair of dots) which varied across the 360 degrees range of angular pos...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p3180
更新日期:2001-01-01 00:00:00
abstract::An experiment is reported in which the attribution of gender to isolated facial features and to faces whose features have been interchanged with those of a face of the opposite gender has been examined. Sixteen male faces were averaged to create a prototype male face and sixteen female faces averaged to create a proto...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p220829
更新日期:1993-01-01 00:00:00
abstract::Three experiments were carried out to examine whether a texture gradient influences perception of relative object height. Previous research implicated texture cues in judgments of object width, but similar influences have not been demonstrated for relative height. In this study, I evaluate a hypothesis that the projec...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p7188
更新日期:2012-01-01 00:00:00
abstract::A computer-controlled display of random dots was used to study perceptions of depth. In this display, a field of stationary random dots surrounded a rectangular area in which random dots moved with uniform velocity in a single direction. The boundaries of this rectangle did not move. When dot motion was perpendicular ...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p170289
更新日期:1988-01-01 00:00:00
abstract::Naito and Cole [1994, in Contributions to Mathematical Psychology: Psychometrics and Methodology Eds G H Fischer and D Laming (New York: Springer)] provide a configuration which they describe as the Gravity Lens illusion. In this configuration, four small dots are presented in proximity to four large disks, and one is...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p271221
更新日期:1998-01-01 00:00:00
abstract::Deaf individuals rely on facial expressions for emotional, social, and linguistic cues. In order to test the hypothesis that specialized experience with faces can alter typically observed gaze patterns, twelve hearing adults and twelve deaf, early-users of American Sign Language judged the emotion and identity of expr...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p6858
更新日期:2011-01-01 00:00:00
abstract::The present paper focuses on Galileo's conception of perception. I take as my starting point the interpretation of the Galilean text by Piccolino and Wade (2008, Perception 37 1312-1340): Galileo's eye: a new vision of the senses in the work of Galileo Galilei. Three points are discussed: the criticism of naive realis...
journal_title:Perception
pub_type: 历史文章,杂志文章,评审
doi:10.1068/p7155
更新日期:2012-01-01 00:00:00
abstract::The earliest known explicit and unambiguous employment of representation in external media is in the form of figurative depictions of large mammals during the Upper Palaeolithic. These images, though often created with evident technical skill and intimate knowledge of the subject matter, are frequently characterised b...
journal_title:Perception
pub_type: 历史文章,杂志文章
doi:10.1068/p6079
更新日期:2009-01-01 00:00:00
abstract::From the first works of Buswell, Yarbus, and Noton and Stark, the scan path for viewing complex images has been considered as a possible key to objective estimation of cognitive processes and their dynamics. However, evidences both pro and con were revealed in the modern research. In this article, the results supporti...
journal_title:Perception
pub_type: 杂志文章
doi:10.1177/0301006615596872
更新日期:2015-01-01 00:00:00
abstract::This paper is about kinds of visual ambiguity that concern the author as a painter. Some effects of incompatible depth cues on the experience of looking at paintings and drawings are discussed. Particular attention is given to the role of colour as a depth cue. It is suggested that areas of identical pigmentation on d...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p080157
更新日期:1979-01-01 00:00:00
abstract::Previous studies on the visual origin of time-to-collision (Tc) information have demonstrated that Tc estimates can be based solely on the processing of target expansion rate (optic variable tau). But in the simulated situations used (film clips), there was little reliable information on speed (owing to reduced periph...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p170623
更新日期:1988-01-01 00:00:00
abstract::Following Karwoski, Odbert, and Osgood (1942, Journal of General Psychology 26 199-222), it is proposed that cross-sensory correspondences can arise from extensive, bi-directional cross-activation between dimensions of connotative meaning. If this account is correct, the same set of cross-sensory correspondences (eg b...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p7149
更新日期:2012-01-01 00:00:00
abstract::We examine a shape illusion, in which the balconies of a building appear to tilt up or down, depending on the viewpoint. The balconies are actually level parallelogram shapes, but appear as tilted rectangles. We measured the illusory tilts observed when parallelogram shapes are viewed above the line of sight, using th...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p3013
更新日期:2000-01-01 00:00:00
abstract::A study is reported which shows that accommodation can be stimulated by a blur stimulus which is below the threshold for visual perception. It is also shown that perceptual fading of the target, caused by stabilization of the retinal image (Troxler phenomenon), can eliminate the accommodative response causing it to de...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p150007
更新日期:1986-01-01 00:00:00
abstract::Burt and Julesz experimentally demonstrated that, in addition to Panum's fusional area, a quantity defined by them and named disparity gradient also plays a crucial part in deciding whether the human visual system would be able to fuse the images seen by the left and right eyes. The physical meaning of this quantity r...
journal_title:Perception
pub_type: 杂志文章
doi:10.1068/p140685
更新日期:1985-01-01 00:00:00