publications([{ "lang": "en", "publisher": "ACM", "doi": "https://doi.org/10.1145/3379337.3415893", "title": "GyroSuite: General-Purpose Interactions for Handheld Perspective Corrected Displays", "url": "https://hal.archives-ouvertes.fr/hal-02985961", "abstract": "Handheld Perspective-Corrected Displays (HPCDs) are physical objects that have a notable volume and that display a virtual 3D scene on their entire surface. Being handheld, they create the illusion of holding the scene in a physical container (the display). This has strong benefits for the intuitiveness of 3D interaction: manipulating objects of the virtual scene amounts to physical manipulations of the display. HPCDs have been limited so far to technical demonstrators and experimental tools to assess their merits. However, they show great potential as interactive systems for actual 3D applications. This requires that novel interactions be created to go beyond object manipulation and to offer general-purpose services such as menu command selection and continuous parameter control. Working with a two-handed spherical HPCD, we report on the design and informal evaluations of various interaction techniques for distant object selection, scene scaling, menu interaction and continuous parameter control. In particular, our design leverages the efficient two-handed control of the rotations of the display. We demonstrate how some of these techniques can be assemble in a self-contained anatomy learning application. Novice participants used the application in a qualitative user experiment. Most participants used the application effortlessly without any training or explanations.", "authors": { "1": { "first_name": "Thibault", "last_name": "Louis" }, "2": { "first_name": "Jocelyne", "last_name": "Troccaz" }, "3": { "first_name": "Amélie", "last_name": "Rochet-Capellan" }, "4": { "first_name": "François", "last_name": "Bérard" } }, "year": 2020, "uri": "http://iihm.imag.fr/publication/LTR+20a/", "pages": "1248-1260", "bibtype": "inproceedings", "id": 921, "abbr": "LTR+20a", "address": "Minneapolis (Virtual Event), United States", "date": "2020-10-20", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "UIST 2020 - 33rd Annual ACM Symposium on User Interface Software and Technology", "type_publi": "icolcomlec" }, { "lang": "en", "publisher": "ACM", "doi": "https://doi.org/10.1145/3399715.3399815", "title": "When High Fidelity Matters: AR and VR Improve the Learning of a 3D Object", "url": "https://hal.archives-ouvertes.fr/hal-02985937", "abstract": "Virtual and Augmented Reality Environments have long been seen as having strong potential for educational applications. However, research showing actual evidences of their benefits is sparse. Indeed , some recent studies point to unnoticeable benefits, or even a detrimental effect due to an increase of cognitive demand for the students when using these environments. In this work, we question if a clear benefit of AR and VR can be robustly measured for a specific education-related task: learning a 3D object. We ran a controlled study in which we compared three interaction techniques. Two techniques are VR-and AR-based; they offer a High Fidelity (HF) virtual reproduction of observing and manipulating physical objects. The third technique is based on a multi-touch tablet and was used as a baseline. We selected a task of 3D object learning as one potentially benefitting from the HF reproduction of object manipulation. The experiment results indicate that VR and AR HF techniques can have a substantial benefit for education as the object was recognized more than 27% faster when learnt using the HF techniques than when using the tablet.", "authors": { "1": { "first_name": "Thibault", "last_name": "Louis" }, "2": { "first_name": "Jocelyne", "last_name": "Troccaz" }, "3": { "first_name": "Amélie", "last_name": "Rochet-Capellan" }, "4": { "first_name": "Nady", "last_name": "Hoyek" }, "5": { "first_name": "François", "last_name": "Bérard" } }, "year": 2020, "uri": "http://iihm.imag.fr/publication/LTR+20b/", "pages": "39:1-9", "bibtype": "inproceedings", "id": 922, "abbr": "LTR+20b", "address": "Salerno, Italy", "date": "2020-09-28", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "AVI 2020 -International Conference on Advanced Visual Interfaces", "type_publi": "icolcomlec" }, { "lang": "fr", "type_publi": "these", "title": "Implementation and benefits of high fidelity interactive systems : from a more performant control to faster 3D objects learning.", "url": "https://tel.archives-ouvertes.fr/tel-03117757", "abstract": "Interacting with 3D virtual scenes is essential for numerous applications. Among others: 3D data visualization, computer assisted design, training simulators and video games. Performing this task through 2D systems like desktop computers or multi-touch tablets can be tedious. To interact more efficiently with 3D contents, high fidelity interactive systems such as virtual reality head-mounted displays try to reproduce the interactive modalities available in real life. Such systems offer a stereoscopic head-coupled rendering and an isomorphic control of 3D objects. However, there is a lack of rigorous studies that showed their benefits in the literature. This thesis has two purposes. We want to enrich the literature through controlled user studies that bring robust results on high fidelity systems' benefits. We also seek to provide the means to implement the most efficient high fidelity experiences.In this manuscript, we start by presenting a state of the art of existing high fidelity devices and their potential benefits. We especially introduce a promising approach called handheld perspective corrected displays (HPCD), that we particularly studied through this thesis.We then present two contributions that allowed us to quantify high fidelity systems benefits. We studied two tasks involving very different cognitive processes in order to attest the variety of applications that could benefit from those systems. The first study concerns a 6D docking task. The two high fidelity systems that we tested, an HPCD and a virtual reality head mounted display, performed respectively 43% and 29% more efficiently than the status quo (an articulated arm used alongside a flat screen). The second study focuses on the task of learning the shape of an unknown 3D object. Regarding this task, the two previously studied high fidelity systems allowed to enhance by 27% the object's recognition performances when compared to the use of a multi-touch tablet.We then present two other contributions that bring solutions to ease both hardware and software implementation of high fidelity systems. We provide a method to evaluate the impact of several technical parameters on the presence felt during an interactive experience, which is a feeling that testifies to the experience’s fidelity with regard to the simulated reality. Using this method in a user study allowed us to identify the fact that, with the tested HPCD, the tracking stability and the rendering frame rate were the most critical parameters concerning presence. We finally suggest a suit of interacting techniques that enable the implementation of applications well suited for spherical HPCD, and any other devices that provide a manipulable screen held with both hands. The proposed interactions take advantage of the efficient control of the device rotations and appeared to be both intuitive and efficient during a qualitative test in an anatomy learning application.", "year": 2020, "uri": "http://iihm.imag.fr/publication/L20a/", "id": 895, "bibtype": "phdthesis", "abbr": "L20a", "authors": { "1": { "first_name": "Thibault", "last_name": "Louis" } }, "date": "2020-10-22", "type": "Thèses et habilitations", "pages": "201" }, { "lang": "en", "publisher": "ACM", "doi": "http://dx.doi.org/10.1145/3343055.3359710", "title": "Is it Real? Measuring the Effect of Resolution, Latency, Frame rate and Jitter on the Presence of Virtual Entities", "abstract": "The feeling of presence of virtual entities is an important ob-\r\njective in virtual reality, teleconferencing, augmented reality,\r\nexposure therapy and video games. Presence creates emotional\r\ninvolvement and supports intuitive and efficient interactions.\r\nAs a feeling, presence is mostly measured via subjective ques-\r\ntionnaire, but its validity is disputed. We introduce a new\r\nmethod to measure the contribution of several technical pa-\r\nrameters toward presence. Its robustness stems from asking\r\nparticipant to rank contrasts rather than asking absolute val-\r\nues, and from the statistical analysis of repeated answers. We\r\nimplemented this method in a user study where virtual entities\r\nwere created with a handheld perspective corrected display.\r\nWe evaluated the impact on two virtual entities’ presence of\r\nfour important parameters of digital visual stimuli: resolu-\r\ntion, latency, frame rate and jitter. Results suggest that jitter\r\nand frame rate are critical for presence but not latency, and\r\nresolution depends on the explored entity.", "authors": { "1": { "first_name": "Thibault", "last_name": "Louis" }, "2": { "first_name": "J.", "last_name": "Troccaz" }, "3": { "first_name": "Amélie", "last_name": "Rochet-Capellan" }, "4": { "first_name": "François", "last_name": "Bérard" } }, "year": 2019, "uri": "http://iihm.imag.fr/publication/LTR+19a/", "id": 872, "bibtype": "inproceedings", "editor": "ACM", "address": "[Deajon,] Republic of Korea", "date": "2019-11-10", "document": "http://iihm.imag.fr/publs/2019/iss_2019_camera_ready_id_1062.pdf", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "ISS ’19", "type_publi": "icolcomlec", "abbr": "LTR+19a" }, { "lang": "en", "bibtype": "inproceedings", "doi": "https://doi.org/10.1109/ISMAR-Adjunct.2018.00114", "title": "A low-latency, high-precision handheld perspective corrected display", "url": "http://iihm.imag.fr/publs/2018/ISMAR18_HPCD_demo_Berard.pdf", "booktitle": "Adjunct Proceedings of the IEEE International Symposium for Mixed and Augmented Reality 2018", "year": 2018, "uri": "http://iihm.imag.fr/publication/BL18a/", "id": 847, "note": "ISMAR 2018 best demo award", "abbr": "BL18a", "authors": { "1": { "first_name": "François", "last_name": "Bérard" }, "2": { "first_name": "Thibault", "last_name": "Louis" } }, "date": "2018-10-16", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "pages": "397-398", "type_publi": "icolcomlec" }, { "lang": "en", "type_publi": "icolcomlec", "doi": "https://doi.org/10.1145/3132272.3134124", "title": "Superiority of a Handheld Perspective-Coupled Display in Isomorphic Docking Performances", "url": "http://iihm.imag.fr/publs/2017/iss17-superiority-louis.pdf", "abstract": "Six degrees of freedom docking is one of the most fundamental tasks when interacting with 3D virtual worlds. We investigated docking performances with isomorphic interactions that directly relate the 6-dof pose of the input device to that of the object controlled. In particular, we studied a Handheld Perspective-Coupled Display (HPCD); which is a novel form of interactive system where the display itself is handheld and used as the input device. It was compared to an opaque HMD and to a standard indirect flat display used with either a sphere or an articulated arm as the input device. A novel computation of an Index of Difficulty was introduced to measure the efficiency of each interaction. We observed superior performances with the HPCD compared with the other interactions by a large margin (17% better than the closest interaction).", "year": 2017, "uri": "http://iihm.imag.fr/publication/LB17a/", "pages": "72-81", "bibtype": "inproceedings", "id": 796, "abbr": "LB17a", "authors": { "1": { "first_name": "Thibault", "last_name": "Louis" }, "2": { "first_name": "François", "last_name": "Bérard" } }, "date": "2017-10-19", "document": "http://iihm.imag.fr/publs/2017/iss17-superiority-louis.pdf", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "Proceedings of the 2017 ACM International Conference on Interactive Surfaces and Spaces" }, { "lang": "en", "type_publi": "icolcomlec", "doi": "http://dx.doi.org/10.1145/3025453.3025806", "title": "The Object Inside: Assessing 3D Examination with a Spherical Handheld Perspective-Corrected Display", "url": "http://tripet.imag.fr/publs/2017/CHI17_Berard_HPCD.pdf", "abstract": "Handheld Perspective Corrected Displays (HPCDs) can create the feeling of holding a virtual 3D object. They offer a direct interaction that is isomorphic to the manipulation of physical objects. This illusion depends on the ability to provide a natural visuomotor coupling. High performances systems are thus required to evaluate the fundamental merits of HPCDs. We built a spherical HPCD using external projection. The system offers a lightweight wireless seamless display with head-coupled stereo, robust tracking, and low latency. We compared users’ performances with this HPCD and two other interactions that used a fixed planar display and either a touchpad or the spherical display as an indirect input. The task involved the inspection of complex virtual 3D puzzles. Physical puzzles were also tested as references. Contrary to expectations, all virtual interactions were found to be more efficient than a more “natural” physical puzzle. The HPCD yielded lower performances than the touchpad. This study indicates that the object examination task did not benefit from the accurate and precise rotations offered by the HPCD, but benefited from the high C/D gain of the touchpad.", "authors": { "1": { "first_name": "François", "last_name": "Bérard" }, "2": { "first_name": "Thibault", "last_name": "Louis" } }, "year": 2017, "uri": "http://iihm.imag.fr/publication/BL17a/", "pages": "4396-4404", "bibtype": "inproceedings", "id": 789, "editor": "ACM", "address": "Denver, USA", "date": "2017-05-06", "document": "http://iihm.imag.fr/publs/2017/chi17-object_inside-berard.pdf", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems", "abbr": "BL17a" }]);