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  • Handwriting Samples
  • Handwriting as Shapes
  • Common Handwriting Shapes
  • Writer Profiles
  • How Does Handwriter Compare Writer Profiles?

Learn How Handwriter Constructs Writer Profiles

Handwriter constructs writer profiles from handwriting samples.

Handwriting Samples

Handwriter takes scanned handwriting samples saved as PNG images. For best results, scan your samples at 300 DPI.

A short handwriting sample

Handwriting as Shapes

Handwriter splits the scanned handwriting into component shapes called graphs. Graphs capture shapes, not necessarily individual letters. They might be a part of a letter or contain parts of multiple letters.

A handwriting sample split into graphs

Common Handwriting Shapes

Handwriter analyzed handwriting samples from 100 writers, grouping the tens of thousands of graphs into 40 forty clusters of similar shapes with a K-Means clustering algorithm. The result is a cluster template of 40 exemplar handwriting shapes. These shapes might be part of a letter or contain parts of multiple letters. The cluster template is used to estimate writer profiles.

A cluster template

Writer Profiles

Each graph in a handwriting sample is matched to its most similar shape in the cluster template. By counting how often a writer uses graphs from each cluster, handwriter creates a profile of a writer’s handwriting style. This profile shows the writer’s tendency to form shapes in particular ways.

Writer profiles from two handwriting samples in the CSAFE Handwriting Database

How Does Handwriter Compare Writer Profiles?