= Ray Smith
{disambiguate=OCR researcher}
{c}
<Ray Smith (OCR researcher)> is a researcher and developer associated with <optical character recognition> and the <Tesseract (software)> engine. His official author profile records development of Tesseract at HP Labs Bristol and later work on it at Google. These are documented contributions, rather than an identification with other people sharing the name.<Ray Smith profile by Google Research>[author biography and linked publications]{ref}
His 2007 paper <An Overview of the Tesseract OCR Engine by Ray Smith> explains an architecture that first organizes a page into text lines and words, then performs recognition in two passes. Confident first-pass results train an <adaptive classifier>; a later pass revisits difficult words using what the system has learned about that document. The paper also discusses <character segmentation> and recognition features.<An Overview of the Tesseract OCR Engine by Ray Smith>[pp629–632,Sections2and7: architecture and adaptive classification]{ref}
A useful example is a page printed in one unusual <font>. Recognizing several clear characters can provide evidence about that page's letter shapes, helping interpret an ambiguous character elsewhere. Adaptation improves specificity but also makes the reliability of its training examples important. This explains a documented design idea; the 2007 architecture should not be assumed to describe every later Tesseract release.
\Image[https://research.google.com/pubs/people_images/4479.png]
{title=Ray Smith, the OCR researcher, identified on his Google Research author profile}
{description=External portrait linked by <Ray Smith profile by Google Research>.}
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