Paper Review #16: LADDER

1. Paper Bibliography

• Title: LADDER, a sketching language for user interface developers

• Authors: Hammond, Tracy, and Randall Davis.

• Publication: Computers & Graphics 29.4 (2005): 518-532.

2. Summary

• LADDER is a language to describe how sketched diagrams in a domain are drawn, display and edited
• To simplify a development of a new sketch recognition interface

3. Details

• Three main parts
• Domain description
• Definitions of shapes: predefined shapes -> constraints
• Hierarchical, Abstract, 
• Vectors = sub components
• Translation
• Generating shape recognition
• Generating editing recognition
• Generating shape exhibitors
• Sketch Recognition system
• Recognition
• Editing
• Display
• Multi-domain recognitions system
• Primitive shapes -> domain shapes
• Constrains solver
• Take in a shape description and initial location for all of the sub shapes and outputs the shape with all the constraints satisfied.
• Example

4. Evaluation

• Auto-generation

you can download and run the code: http://srl.cse.tamu.edu/srlng/research/project/3