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To get the best results from OCR, the ingested images or video must have sufficient contrast and be in focus.
The minimum height for a readable character in a high-quality image is approximately 10 pixels. In a poorer quality image, the characters must be larger.
If you know that all of the text in your images matches a specific character type, for example is upper case or only contains numbers, set the
CharacterTypes configuration parameter. This can improve accuracy in some cases, because Media Server does not look for other character types.