I'm using the API of tesseract-ocr 3.02 to parse a document and extract the content. The result is pretty good if I analyse the whole page by calling SetImage / GetUtf8Text. But I need to restrict my search in only one part of the picture, so I used SetRectangle, but then the result get pretty bad. Why is it so? I also tries iterate on the boxes (as given in the tutorial), but the result is also bad. What is the difference between using the whole page or only a part of it?
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