This paper presents a novel approach for reconstructing freeform, texture-mapped, 3D scene models from a single painting or photograph. Given a sparse set of user-specified constraints such as surface normals, silhouettes, and creases, a smooth 3D surface is generated that satisfies the constraints. This problem is formulated as a constrained variational optimization problem. A key feature of t...

In this paper a new system for piecewise primitive surface recovery on point clouds is presented, which allows a novice user to sketch areas of interest in order to guide the fitting process. The algorithm is demonstrated against a benchmark technique for autonomous surface fitting, and, contrasted against existing literature in user guided surface recovery, with empirical evidence. It is concl...

This report focuses on the acquisition of shape and appearance of real objects under static illumination without the need for an elaborate calibration process or an expensive setup. Emphasis is placed on ease of use and obtaining visually pleasing results. Using recent advances in matting techniques, an opacity hull of the object is computed from an un-calibrated sequence of photographs. User i...

Creating 2D and 3D models in CAD and following creation of drawings are standard procedures for constructing in the current industrial practice. Most models of industrially produced machine parts can be made by basic processes of modeling using construction or hybrid methods. Listed procedures are based on input of a basic – primitive body and its shaping using predefined design elements, combi...

In this paper, we present a free-form deformation (FFD) approach to manipulate point-sampled surface. Our approach provides users the powerful free-form deformation directly on point-sampled surface. In the preprocessing, we use a robust extension of hierarchical clustering scheme to partition a point-sampled model into clusters, fit a moving least square (MLS) surface to each of them, and defi...

This paper describes a method for direct freehand drawing of complex tri-dimensional surfaces by moving 2 hands in space. The system tracks the movement of 2 lights in space using 2 web cams. The light’s (LED’s) are attached to the designer’s fingers who watches the surface being drawn on a monitor. The user can draw any surface that can be described by the movement in space of a line of varyin...

We present a gesture-based user interface to Free-Form Deformation (FFD). Traditional interfaces for FFD require the manipulation of individual points in a lattice of control vertices, a process which is both time-consuming and error-prone. In our system, the user can bend, twist, and stretch/squash the model as if it were a solid piece of clay without being unduly burdened by the mathematical ...

The free-form surface matching problem is important in several practical applications, such as reverse engineering. An accurate, robust and fast solution is, therefore, of great significance. Recently genetic algorithms have attracted great interest for their ability to robustly solve hard optimization problems. In this work we investigate the performance of such an approach for finding the ini...

This paper presents a novel approach for reconstructing free-form, texture-mapped, 3D scene models from a single painting or photograph. Given a sparse set of user-specified constraints on the local shape of the scene, a smooth 3D surface that satisfies the constraints is generated. This problem is formulated as a constrained variational optimization problem. In contrast to previous work in sin...

Most of the work in the field of topology optimization is concentrated on using sensitivity analysis and optimality criteria methods that need explicit formulation. The design systems are often hard-coded for a specific problem with specialized optimization and FEM routines. This paper presents a work that uses a system approach to solid free form design. It attempts to develop a general topolo...