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<p>(extracted) <a href="page.php?w=text-to-speech">text-to-speech</a>, key data and <a href="page.php?w=text_mining">text mining</a>. OCR is a field of research in <a href="page.php?w=pattern_recognition">pattern recognition</a>, <a href="page.php?w=artificial_intelligence">artificial intelligence</a> and <a href="page.php?w=computer_vision">computer vision</a>.</p>

<p>Early versions needed to be trained with images of each character, and worked on one font at a time. Advanced systems capable of producing a high degree of accuracy for most fonts</p><p>
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