Justin Plantier

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The aim of “Shape From Texture (SFT)” methods is to obtain three dimensional information out of the monocular view of a scene. In this article, we detail a 2-step SFT computational method. A new local scales extraction technique is used in the first step to compute the local scale of each point of the picture through an interpolation of wavelet values. In(More)
According to the eye muscle potentiation (EMP) hypothesis, sustained vergence leads to changes in egocentric perceived distance. This perceptual effect has been attributed to a change in the resting or tonic state of vergence. The goal of the present study was to test the EMP hypothesis by quantifying the relationship between prism-induced changes in tonic(More)
In a previous work we have presented a method for computing the orientation of an inclined textured plane and the results we can be expected. In this paper we show how it is possible to increase the precision on the slant angle, for a special kind of textures: regular macro textures. It is again a theoretical shrdy. Our objective is to obtain a good(More)
While the mechanisms of short-term adaptation to prism-altered apparent visual direction have been widely investigated, the processes underlying adaptation to prism-altered perceived distance are less well known. This study used a hand-pointing paradigm and exposure with base-out prisms to evaluate the relative contributions of sensory (visual and(More)
Factors limiting binocular fusion were studied using 2-dimensional difference of Gaussian (2D-DOG) stimuli. The proportion of fused stimuli and observer's response time were determined for stimuli that varied in spatial frequency composition between 0.22 and 4.8 cycles per degree. At small disparities, mean fusion response times were short and relatively(More)
When stimuli are repeated in a rapid serial visual presentation (RSVP), observers sometimes fail to report the second occurrence of a target. This phenomenon is referred to as "repetition blindness" (RB). We report an RSVP experiment with photographs in which we manipulated object viewpoints between the first and second occurrences of a target (0°, 45°, or(More)
In this article, we introduce a new method for texel ex­ traction on inclined textured planes. This method relies on a technique for determination of local frequencies and the use of a "Shape flVm Texture" method derived from the work of Lu et al. [6]. This method allows to make an adapted ex­ traction to the texture size and the deformations introduced by(More)
We present one method for detecting defects on an inclined textured plane. This method uses a combination of a shape from texture (SFT) method with the Delaunay triangulation technique. The SFT method provides the theoretical equation of the plane orientation in two steps. First, a wavelet decomposition allows us to build an image of the inverse of the(More)