publications([{
   "lang": "fr",
   "type_publi": "these",
   "doi": "https://tel.archives-ouvertes.fr/tel-01312180",
   "title": "Peinture Numérique sur Modèles 3D en Usage Récréatif",
   "abstract": "Creating digital 3D scenes is attractive for the general public. However, even if hardware and financial constraints tend to disappear, the creation of 3D content remains a difficult task for novice users. Indeed, 3D modeling software is complex and requires a long learning process that is not suitable for recreational use. The purpose of this work is to contribute to the democratization of digital 3D creation by the study and design of human-computer interactions that are appropriate to novice users.We focus on the 3D painting task: digital painting on 3D models. We analyze the problem according to three axes: stylus interaction, navigation inside the 3D scene, and the combination of both painting and navigation. We first present a state of the art regarding the techniques of 3D painting and 3D navigation as well as their possible combinations. We also survey the existing input devices for 3D painting.We then present our three main contributions. A first experiment allows us to evaluate the effect of the directness of interaction on the 3D painting task. The study reveals that direct interaction leads to the drawing of higher quality line segments than indirect interaction. Next, we propose new interaction techniques for rotating around 3D objects. They are evaluated through another experiment that reveals the importance of a new criterion that we introduce: surjection. Finally, we present an evaluation of various combinations of 3D navigation and 3D painting interaction techniques. This study reveals that a bimanual interaction combining touch and stylus is the most appropriate for digital painting on 3D models by novice users.Our work, considered with other efforts that aim at simplifying 3D modeling, indicates that digital 3D creation for the general public is within reach.",
   "year": 2016,
   "uri": "http://iihm.imag.fr/publication/R16a/",
   "id": 837,
   "bibtype": "phdthesis",
   "editor": "Université Grenoble Alpes",
   "authors": {
      "1": {
         "first_name": "Élisabeth",
         "last_name": "Rousset"
      }
   },
   "date": "2016-02-11",
   "document": "http://iihm.imag.fr/publs/2016/PHD16_Rousset.pdf",
   "type": "Thèses et habilitations",
   "pages": "188",
   "abbr": "R16a"
},
{
   "lang": "en",
   "type_publi": "colcomlec",
   "doi": "https://doi.org/10.1145/2820619.2820633",
   "title": "Study of the Effect of the Directness of the Interaction on Novice Users When Drawing Straight Lines",
   "abstract": "Pen-enabled devices are widely used in computer graphics.\r\nSome artists use direct devices (interactive pen displays) whereas others use indirect devices (graphics tablets) and this applies to both professionals and hobbyists.\r\nIn this paper we studied how indirect pen-enabled devices affect drawing performance compared to their direct counter-parts for novice users. We also studied the influence of gain for indirect pen-enabled devices. We considered no gain (i.e. C/D=1), a homogenous gain (gain=2 on both the x and y axes) and a heterogenous gain (gain=2 on the x axis and gain=1 on the y axis).\r\nResults indicate that drawing performance and quality decreased with indirectness and with both homogeneous and heterogeneous gains. In addition, we conducted a qualitative study showing that participants preferred direct devices.",
   "authors": {
      "1": {
         "first_name": "Élisabeth",
         "last_name": "Rousset"
      },
      "2": {
         "first_name": "François",
         "last_name": "Bérard"
      },
      "3": {
         "first_name": "Michael",
         "last_name": "Ortega"
      }
   },
   "year": 2015,
   "uri": "http://iihm.imag.fr/publication/RBO15a/",
   "pages": "14:1--14:7",
   "bibtype": "inproceedings",
   "id": 745,
   "abbr": "RBO15a",
   "address": "Toulouse, France",
   "date": "2015-10-22",
   "document": "http://iihm.imag.fr/publs/2015/drawinglines.pdf",
   "type": "Conférences nationales avec comité de lecture sur texte complet",
   "booktitle": "IHM'15"
},
{
   "lang": "en",
   "publisher": "ACM",
   "doi": "http://dx.doi.org/10.1145/2598153.2598183",
   "title": "Two-Finger 3D Rotations for Novice Users: Surjective and Integral Interactions",
   "abstract": "Now that 3D interaction is available on tablets and smart phones, it becomes critical to provide efficient 3D interaction techniques for novice users. This paper investigates interaction techniques for 3D rotation with two fingers of a single hand, on multitouch mobile devices.\r\nWe introduce two new rotation techniques that allow integral control of the 3 axes of rotation. These techniques also satisfy a new criterion that we introduce: surjection. We ran a study to compare the new techniques with two widely used rotation techniques from the literature. Results indicate that surjection and integration lead to a performance improvement of a group of participants who had no prior experience in 3D interaction. Qualitative results also indicate participants’ preference for the new interaction techniques.\r\n",
   "authors": {
      "1": {
         "first_name": "Élisabeth",
         "last_name": "Rousset"
      },
      "2": {
         "first_name": "François",
         "last_name": "Bérard"
      },
      "3": {
         "first_name": "Michael",
         "last_name": "Ortega"
      }
   },
   "year": 2014,
   "uri": "http://iihm.imag.fr/publication/RBO14a/",
   "pages": "217-224",
   "bibtype": "inproceedings",
   "id": 688,
   "abbr": "RBO14a",
   "address": "Como, Italy",
   "date": "2014-06-06",
   "document": "http://iihm.imag.fr/publs/2014/AVI14-RoussetBerardOrtega_2Finger3DRotations.pdf",
   "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet",
   "booktitle": "Conference Proceedings of ACM-Advanced Visual Interfaces (AVI 2014)",
   "type_publi": "icolcomlec"
}]);