Browsing by Author "Lopes, Daniel Simões"
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- Anatomy Studio: A tool for virtual dissection through augmented 3D reconstructionPublication . Zorzal, Ezequiel R.; Sousa, Maurício; Mendes, Daniel; Anjos, Rafael Kuffner dos; Medeiros, Daniel; Paulo, Soraia Figueiredo; Rodrigues, Pedro; Mendes, José João; Delmas, Vincent; Uhl, Jean-François; Mogorrón, José; Jorge, Joaquim Armando; Lopes, Daniel Simões"3D reconstruction from anatomical slices allows anatomists to create three dimensional depictions of real structures by tracing organs from sequences of cryosections. However, conventional user interfaces rely on single-user experiences and mouse-based input to create content for education or training purposes. In this work, we present Anatomy Studio, a collaborative Mixed Reality tool for virtual dissection that combines tablets with styli and see-through head-mounted displays to assist anatomists by easing manual tracing and exploring cryosection images. We contribute novel interaction techniques intended to promote spatial understanding and expedite manual segmentation. By using mid-air interactions and interactive surfaces, anatomists can easily access any cryosection and edit contours, while following other user’s contributions. A user study including experienced anatomists and medical professionals, conducted in real working sessions, demonstrates that Anatomy Studio is appropriate and useful for 3D reconstruction. Results indicate that Anatomy Studio encourages closely-coupled collaborations and group discussion, to achieve deeper insights."
- Estimating anatomically plausible segment orientations using a kinect one sensorPublication . Matias, Nuno Vaz; Roupa, Ivo; Gonçalves, Sérgio; Silva, Miguel Tavares da; Lopes, Daniel Simões
- On the potential of virtual reality for locomotion rehabilitationPublication . Gordo, Alexandre; Silva, Inês dos Santos; Nicolau, Hugo; Lopes, Daniel Simões
- Proximity-aware interactive displays for rehabilitation centresPublication . Faria, Afonso; Duarte, Stéphane; Lopes, Daniel Simões; Nicolau, Hugo
- A Usability Study on Widget Design for Selecting Boolean OperationsPublication . Chambel Lopes, Diogo; Mendes, Helena; Portal, Ricardo; Klerk, Rui de; Nogueira, Isabel; Lopes, Daniel SimõesApplying the correct set of Boolean operations is a fundamental task in constructive solid geometry (CSG), which is a staple in automated manufacturing systems. Although textual buttons and icons are the most common interfaces to apply such operations, these require an unnecessary cognitive load that hampers the solid modeling process. This study presents VennPad, a novel CSG widget that gathers all Boolean operations under the same user interface control element and is represented as a two-set Venn diagram. Contrary to conventional CSG widgets, VennPad supports a graphical interface that gives simultaneous access to several types of Boolean operations (intersection, union, difference, symmetric difference and split). A usability study was conducted to ascertain whether VennPad is a more natural interface compared to textual buttons and icon-based widgets for different solid modeling tasks. VennPad proved to be an effective interface to perform Boolean operations. Qualitative feedback places VennPad as the preferred interface, but efficiency results are operation dependent, thus, opening the way to new design iterations.