Can 3D synthesized views be reliably assessed through usual subjective and objective evaluation protocols?

International audienceThis paper addresses the problem of evaluating virtual view synthesized images in the multi-view video context. As a matter of fact, view synthesis brings new types of distortion. The question refers to the ability of the traditional used objective metrics to assess synthesized views quality, considering the new types of artifacts. The experiments conducted to determine their reliability consist in assessing seven different view synthesis algorithms. Subjective and objective measurements have been performed. Results show that the most commonly used objective metrics can be far from human judgment depending on the artifact to deal with

Perceived quality of DIBR-based synthesized views

International audienceThis paper considers the reliability of usual assessment methods when evaluating virtual synthesized views in the multi-view video context. Virtual views are generated from Depth Image Based Rendering (DIBR) algorithms. Because DIBR algorithms involve geometric transformations, new types of artifacts come up. The question regards the ability of commonly used methods to deal with such artifacts. This paper investigates how correlated usual metrics are to human judgment. The experiments consist in assessing seven different view synthesis algorithms by subjective and objective methods. Three different 3D video sequences are used in the tests. Resulting virtual synthesized sequences are assessed through objective metrics and subjective protocols. Results show that usual objective metrics can fail assessing synthesized views, in the sense of human judgment

Real-time rendering of large surface-scanned range data natively on a GPU

This thesis presents research carried out for the visualisation of surface anatomy data stored as large range images such as those produced by stereo-photogrammetric, and other triangulation-based capture devices. As part of this research, I explored the use of points as a rendering primitive as opposed to polygons, and the use of range images as the native data representation. Using points as a display primitive as opposed to polygons required the creation of a pipeline that solved problems associated with point-based rendering. The problems inves tigated were scattered-data interpolation (a common problem with point-based rendering), multi-view rendering, multi-resolution representations, anti-aliasing, and hidden-point re- moval. In addition, an efficient real-time implementation on the GPU was carried out

Objective View Synthesis Quality Assessment

International audienceView synthesis brings geometric distortions which are not handled efficiently by existing image quality assessment metrics. Despite the widespread of 3-D technology and notably 3D television (3DTV) and free-viewpoints television (FTV), the field of view synthesis quality assessment has not yet been widely investigated and new quality metrics are required. In this study, we propose a new full-reference objective quality assessment metric: the View Synthesis Quality Assessment (VSQA) metric. Our method is dedicated to artifacts detection in synthesized view-points and aims to handle areas where disparity estimation may fail: thin objects, object borders, transparency, variations of illumination or color differences between left and right views, periodic objects... The key feature of the proposed method is the use of three visibility maps which characterize complexity in terms of textures, diversity of gradient orientations and presence of high contrast. Moreover, the VSQA metric can be defined as an extension of any existing 2D image quality assessment metric. Experimental tests have shown the effectiveness of the proposed method

Hamburger Helper Recipes

Hamburger Helper Recipes is a collection of essays and public addresses that aim to recuperate castoff and misfit material surrounding industries and tools which produce science-fiction fantasies, specifically videogames and television shows. The following essays confront the normative violence of capitalism, whiteness, and hetero-patriarchy that socially and technologically haunt these imaginary worlds and build hegemonic idealogy into their audiences. This collection takes industrial materials and software from their intended commercial purposes of production and “success” into places of abjection and quiet breakdown. The author’s own proximity to masculine and often toxic work cultures\u27\u27 within industrial spaces of coding and manufacturing has informed a practice of humor and play based in a conflicted love for industrial material. As it looks critically inward and outward from its own positionality, Hamburger Helper Recipes oscillates in relation to the inside or outside of that which is “standard”. The notion of a queer operative within these spaces is proposed as an undercover catalyst for the reimagination of these tools into tender co-conspirators or facilitators charged to break down taboo barriers imposed by normative, capitalist culture and model new relationships between individuals and collectives