Research Projects

  • Image Browsing VR Interface

Effects of Depth Variation on Spatial Memory for Image Browsing in VRmainimage_test.png

Image browsing in virtual environments is becoming a common task. Similar to conventional 2D displays, current VR image browsing interfaces use scrolling to navigate larger collections of images. This form of interaction however, leads to long exploration times requiring extra effort for both retrieving and recalling targets. In this work, we demonstrate how large image collection browsing can be significantly improved by leveraging affordances available in VR such as binocular depth cues, a very large field view, and natural navigation. In this layout, we evaluate for the first time the effect of depth variations under binocular depth cues (stereoscopic, shadow stereopsis)on spatial memory to assist image browsing with a large field of view. To take further advantage of improved spatial layout, we group images as multiple sections, introducing markers and flags. Through comparative experiments, it is shown that subjects have increased capability of retrieving and recalling locations of targets, when images are spatially displayed in varying binocular depth with grouping. 

  • Pseudo-Weight Perception

Haptic illusion (To Be Updated)

 

  • Auditory Feedback

Use of Sound to Provide Occluded Visual Information in Touch Gestural Interface      Screen Shot 2017-05-05 at 11.31.57 PM.pngDirect touch gestures are getting popular as an input modality for mobile and tabletop interaction. However, the finger touch interface is considered as not accurate compared with pen-based interface. One of the main reasons is that the visual feedback of the finger touch is occluded because of the size of fingertip. It has made difficult for perceiving and correcting errors. We propose to utilize another modality to provide information on occluded area. Spatial information on visual channel is transformed to temporal and frequency information on another modality. We use sound modality to illustrate the proposed transmodality. Results show that performance with additional modality is better for drawing where the visual information is important than only with the visual feedback.

  • Sketch Based Interface for Contents Generation

Sketch Based Interface for Parametric Surface Generation

sketch modeling 2sketch modeling 3

We present a new feature for interactive modeling 3D objects with sketch based interface. Most of objects are composed of multiply components. The single component is generated with three strokes, which contain two opened silhouettes and a closed cross sectional. We defined three variables to represent the three strokes, by which reconstruct surface. The user may create relative complex objects which consist of multiply components with iterative way.

Sketch based Interface for 3D shape Editing

37 36

We present a sketch-based interface for editing 3D objects. A sketch based modeling method is presented which allows users to draw 3D shape with only three strokes: left and right sides of silhouettes and a freeform cross section. The generated object can be edited by interpreting user’s multiple strokes. The single stroke is not enough for users to meet their intentions. The key idea is to edit the shape with multiple strokes progressively. We defined several stroke vocabularies to deform the surfaces, for example, global or local volume fatting/thinning, making the radius length of cross section longer or shorter. With the proposed interface, there is no need for expert knowledge in 3D modeling. And users can edit 3D models which represent user’s design concepts and intention intuitively. Our system can be used in the stage of conceptual design by novices for 3D sketching.

Sketch Based Interface for Animation Design

2

We present a sketch based interface for animation design system which allows user to draw 2D sketches that represent the 3D objects and animate the generated objects by drawing strokes which we define. The meaning of the strokes which we define will represent the corresponding animations. We employ the linear and cubic interpolation based method to create animation. Users only need to draw the 2D sketches and the motion path, and then the 3D animation is created automatically. Furthermore, the velocity of movement can be represented by the speed of stroke drawing. The prototype can be applied to the field of education, in order to express the idea intuitively with animation.

  • Deformation

Simplified Implementing As-Rigid-As Possible Shape Manipulation based on Neighborhood Representation

5 4

One of the key technology of character animation editing is not only to achieve as-rigid-as-possible shape deformation, but also real-time operations. Computing in the shape manipulation, by defining the square difference metric of vertex neighborhood and face neighborhood on mesh, simplify coordinates separation of free and constrain vertex. This algorithm can solve x and y coordinates independently in general fitting. In the implementing, the design of appropriate the chain structure of coefficient matrix and constant vector, duplication of data computing are reduced by indexed storage of sparse matrix and conjugate gradient method. Experiments show that in the ordinary personal computer to about 1,000 mesh vertexes can are deformed in real-time interaction.