The constraints on images of rectangular polyhedra
IEEE Transactions on Pattern Analysis and Machine Intelligence
SIGGRAPH '86 Proceedings of the 13th annual conference on Computer graphics and interactive techniques
Emulating the human interpretation of line-drawings as three-dimensional objects
International Journal of Computer Vision
Combining gestures and direct manipulation
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
An optimization-based approach to the interpretation of single line drawings as 3D wire frames
International Journal of Computer Vision
SKETCH: an interface for sketching 3D scenes
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Interactive beautification: a technique for rapid geometric design
Proceedings of the 10th annual ACM symposium on User interface software and technology
Teddy: a sketching interface for 3D freeform design
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
Visual similarity of pen gestures
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Experimental evaluation of an on-line scribble recognizer
Pattern Recognition Letters
Progressive 3D Reconstruction from a Sketch Drawing
PG '01 Proceedings of the 9th Pacific Conference on Computer Graphics and Applications
Interpreting a 3D object from a rough 2D line drawing
VIS '90 Proceedings of the 1st conference on Visualization '90
Technical Section: An optimisation-based reconstruction engine for 3D modelling by sketching
Computers and Graphics
Responsive interaction based on sketch in concept styling
INTERACT'05 Proceedings of the 2005 IFIP TC13 international conference on Human-Computer Interaction
The process improvement impact on the styling workflow of an industrial design company
SBM'04 Proceedings of the First Eurographics conference on Sketch-Based Interfaces and Modeling
SBM'06 Proceedings of the Third Eurographics conference on Sketch-Based Interfaces and Modeling
Automatic single-view character model reconstruction
Proceedings of the International Symposium on Sketch-Based Interfaces and Modeling
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Current user interfaces of CAD systems are still not suited to the initial stages of product development, where freehand drawings are used by engineers and designers to express their visual thinking. In order to exploit these sketching skills, we present a sketch based modeling system, which provides a reduced instruction set calligraphic interface to create orthogonal polyhedra, and an extension of them we named quasi-normalons. Our system allows users to draw lines on free-hand axonometric-like drawings, which are automatically tidied and beautified. These line drawings are then converted into a threedimensional model in real time because we implemented a fast reconstruction process, suited for quasi-normalon objects and so-called axonometric inflation method, providing in this way an innovative integrated 2D sketching and 3D view visualization work environment.