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I'd be wary of applying such a harsh threshold to the output as the author has done here. While it captures the page well enough for typical text, I have encoun

I'd be wary of applying such a harsh threshold to the output as the author has done here. While it captures the page well enough for typical text, I have encountered many pages from Google Books where the threshold has mutilated illustrations or small footnotes to the point of making them unreadable. And if the Google Books scan is the only one available, you're completely out of luck.

cperciva 2y ago
Isn't the thresholding just for identifying landmarks to be used for choosing dewarping parameters? Presumably once found those parameters could be applied to the original image.
- tobr 2y ago
  It’s clearly described as the last step, so it should be easy to omit it if desired.