AB074.Link between interocular correlation sensitivity and stereoscopic vision

Background:Stereoscopic Vision uses the disparity between the two images received by the two eyes in order to create a tridimensional representation.With this study,we aimed at providing an estimate of binocular vision at a level prior to disparity processing.In particular,we wanted to assess the spatial properties of the visual system for detecting interocular correlations(IOC).Methods:We developed dichoptic stimuli,made of textures which IOC is sinusoidally modulated at various correlation spatial frequencies.Then,we compared the sensitivity to these stimuli to the sensitivity to analogous stimuli with disparity modulation.Results:We observed that IOC sensitivity presents a low-pass/band-pass profile and increases as a function of presentation duration and contrast,in a similar way as disparity sensitivity.Conclusions:IOC sensitivity is weakly-though significantly-correlated with disparity sensitivity in the general population,which suggests that it could provide a marker for binocular vision,prior to disparity processing.

无垂直视差图像多视点立体视觉图像的形成特性（英文）

1.Introduction The reproduction systems of 3D images without using eyeglasses and other special accessories has always attracted attention and aroused great interest of developers and consumers of such equipment because of totally accurate image and method of its presentation.Such systems can

APPLICATION OF VIDEO ANAGLYPH MAKER FOR 3-D FLOW SIMULATION

In this article,the anaglyph video maker is employed for generating realistic 3-D flows and the software FlowAnimator is developed using that technology.Based on Microsoft Windows Presentation Foundation（WPF）,the real 3-D scene is set up and marker particles are distributed in it randomly in order to create a more natural flow scenario.The trajectory of the particle motion is calculated with Lagrangian description in 3-D space.During the simulation,the viewport can be changed in order to focus on different parts of the model by panning,zooming,rotating and inclination variation etc.Marker particles may appear in different shapes：spheres,tracking-balls,cylinders and ribbons in order to fit different flows.It is the first time that the video anaglyph technology is employed in the 3-D hydrodynamic simulation,which removes the obstacles for 3-D scenes to be rendered on a flat-panel display.

Fixing an illusion–an empirical assessment of correction methods for the terrain reversal effect in satellite images

Identifying land forms and land cover classes are important tasks in image interpretation.Sometimes,a phenomenon called terrain reversal effect(TRE)causes an inverted perception of 3D forms.When this inversion occurs,valleys appear as ridges and vice versa.While the TRE can severely impair the ability to identify 3D land forms,‘correcting’for the TRE in imagery can introduce new problems.Importantly,one of most commonly-proposed methods–shaded relief map(SRM)overlay–appears to impair the ability to identify land cover classes.In this paper,we report a comparative empirical evaluation of an SRM overlay solution,and its‘enhanced’versions supported by various other cues(stereopsis,motion,labels).In response to the different solutions,we measure the effectiveness,efficiency,confidence and preferences of our participants in land form and land cover identification tasks.All examined methods significantly improve the ability to detect land forms accurately,but they also impair the ability to identify the land cover classes to different degrees.Additionally,participants’visualization preferences contradict their performance with them,calling for reflection on the visual effects of the applied correction methods.Based on the study,recommendations concerning the correction of the TRE are drawn,and gaps are identified.