Resources Contact Us Home
Pointer-based computer system capable of aligning geometric figures

Image Number 13 for United States Patent #5621817.

An apparatus for recognizing shapes characterized by a stroke grouper receptive to a plurality of strokes formed on a screen of a pen-based computer system; a shape recognition engine receptive to a stroke group produced by the stroke grouper; and a knowledge base coupled to the shape recognition engine, where the knowledge base includes, at a minimum, knowledge concerning closed polygons and closed curves. Preferably, the closed curves of the knowledge base include both circles and ellipses. A method for recognizing digitized shapes in a computer system includes the steps of receiving at least one user-initiated stroke; grouping the user-initiated stroke with related strokes to form a stroke group; and analyzing the stroke group to make a best-guess shape represented by the stroke group. Preferably, the method also looks for other shapes which are related to the best-guess shape and modifying at least one of the location, size, or shape of the best-guess shape to conform with the other shapes. The strokes are typically grouped when they are related in time, or space, or in both time and space. A method for recognizing and forming shapes includes the steps of: creating a live group including at least one live stroke; characterizing shape sides from the live group, where a shape side is either straight or curved; forming a polygon from the shape sides if all the shape sides are straight; forming an ellipse from the shape sides if all the shape sides are curved; and forming a composite curve from the shape sides if the shape sides are a mixture of straight sides and curved sides. The step of characterizing shape sides preferably includes the steps of: finding kinks in the live group; defining shape sides as segments between the kinks; and determining whether the shape sides are straight or curved.

  Recently Added Patents
Acrylic pressure-sensitive adhesive composition, acrylic pressure-sensitive adhesive layer, and acrylic pressure-sensitive adhesive tape
Protective vest
Adaptive frame scanning scheme for pulsed X-ray imaging
Nuclear fuel assembly bottom nozzle
Cellulose derivative and hydrogel thereof
Single integrated circuit configured to operate both a capacitive proximity sensor device and a resistive pointing stick
Vehicle hood
  Randomly Featured Patents
Scrambling methods for synchronization channels
Method and core barrel apparatus for obtaining and retrieving subterranean formation samples
Methodologies and systems for trade execution and recordkeeping in a fund of hedge funds environment
Jawed surgical instrument fitted with an electrode and a cable
Method for the mircomechanical measurement of acceleration and a micromechanical acceleration sensor
Methods of using oligomers containing modified pyrimidines
Preprocalcitonin antigen T epitopes
System and method for editing video information
Head stack assembly method using flexure tail raised region
High-speed manufacturing method for composite flywheels