US 7,606,421 B2 · Data extraction from temporal image data

Abstract

In a method and system to extract data from handwritten information when the information is captured as sequences of strokes, vectors, or marks, temporal data is stored within the color or gray-scale encoding of pixel values within a bitmapped image. A bitmapped image is used to create a derived image suitable for data extraction and a method of analyzing the image, including the encoded temporal data, to yield an adjusted image that better reflects the intent of the person who created the handwriting. While the primary application of the invention is in processing handwritten responses to assessment items, the system and method can be advantageously used to extract data from or to improve the presentation of information from an electronic representation of temporal human marks in many applications. Additionally, the system and method can be advantageously used to store and process other types of data within a bitmapped image.

Claims53

Dependent claims

A computerized method of embedding temporal data for handwritten information within a bitmapped image of the handwritten information, said method comprising the steps of:

creating an electronic representation for each stroke, vector, or mark of the handwritten information;
creating a bitmapped image of the handwritten information, the bitmapped image having background and non-background pixels, wherein at least one non-background pixel within the bitmapped image has a color or gray scale value and corresponds to a point within the electronic representation;
and
using a computer to store a temporal data value within the color or gray scale value for the non-background pixel.

1 more element

Dependencies are inferred from the claim text.

Data extraction from temporal image data

Life of this patent

Data extraction from temporal image data

Life of this patent

Abstract

Claims53