For the digitization needs of ancient documents, PDF Craft has developed a special pre-processing module. The system can automatically correct the scanning of ancient books common tilted page (support ± 15 degrees of automatic correction), dealing with yellow and brown background color (using HSV color space denoising), recognition of vertical text (accuracy rate of 86%). Test data show that for pre-19th century English ancient books, the conversion accuracy rate remains in the range of 85-90%, the Chinese canonical books due to the high complexity of the typesetting maintained at 75-80%. tools also provide batch processing mode, support the simultaneous conversion of more than 2,000 pages of a large collection of documents with the external dictionary function can improve the recognition rate of specific areas of terminology 15%. these features make it a popular tool for libraries, archives and other institutions to use. features make it one of the preferred tools for libraries and archival institutions to digitize cultural heritage.
This answer comes from the articlePDF Craft: PDF scanned documents to Markdown open source toolsThe
