After a lot of stepping through tesseract code, I found the problem. 1) In file coutln.cpp, function C_OUTLINE::IsLegallyNested(), we assign outer_area() to an inT32, parent_area. Then lower in the function, we multiple child->outer_area() by parent_area. This caused an integer overflow which resulted in a bad sign for the multiplication. The fix was to make parent_area an inT64 so that integer overflow cannot happen.
The two 32-bit integers being multiplied were -51874 and 60218. The true result should be -3123748532 but the maximum result cannot be greater than 2^31 or you will have sign/overflow problems, which is the case here. The computer result was 1171218764, causing the if-statement to go down the wrong path. dfs -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/10045fef-c2fd-4c1b-87d8-d7cd5d786272%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
