Conceptual free-form styling on the responsive workbench
VRST '00 Proceedings of the ACM symposium on Virtual reality software and technology
Sketching reality: Realistic interpretation of architectural designs
ACM Transactions on Graphics (TOG)
Fair NURBS curve generation using a hand-drawn sketch for computer aided aesthetic design
ISCGAV'07 Proceedings of the 7th WSEAS International Conference on Signal Processing, Computational Geometry & Artificial Vision
A fair curve generation algorithm based on a hand-drawn sketch
ISCGAV'06 Proceedings of the 6th WSEAS International Conference on Signal Processing, Computational Geometry & Artificial Vision
QuickDiagram: a system for online sketching and understanding of diagrams
GREC'09 Proceedings of the 8th international conference on Graphics recognition: achievements, challenges, and evolution
New grouping and fitting methods for interactive overtraced sketches
The Visual Computer: International Journal of Computer Graphics
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This paper introduces a new method to deal with sketches for inputting geometric models at a workstation. The sketches are drawn on a CRT screen through a stylus pencil and a tablet by a designer at an early stage of design procedures. He can keep their drawing stylus at a workstation as the same manner as using a pen on paper. The system `Sketch Interpreter' can correct geometric models in a computer even though input sketches are geometrically distorted. This system can create 3D geometric models in a computer even though input data of 2D sketches are drawn by freehand. The system is constructed in terms of three characteristic procedures on a workstation with a pointing device ; (1) to recognize hand sketches on the screen. Freehand lines are drawn by pen operations from which a computer can construct a 3D geometric model. The first operation computes mathematical parameters for the projective transformation; (2) to construct additional geometric models by inputting more sketches drawn perspectively; and (3) to redraw modified geometric models replacing the sketch lines. Our interactive methods suit to realistically construct any geometric shapes a designer imagines. Data created are transferred to an advanced 3D-CAD system. Our system is applied as a front-end-processor of design practice such as for office equipments.