Document Layout Analysis - Text edges extractor

[BobLd]

Text edges are where words have either there BoundingBox's left, right or mid coordinates aligned on the same vertical line. Useful to detect tables, justified text, lists, etc.

Example uf use:

        using (PdfDocument document = PdfDocument.Open(path))
        {
            for (var i = 0; i < document.NumberOfPages; i++)
            {
                var page = document.GetPage(i + 1);
                var words = page.GetWords();
                var edges = TextEdgesExtractor.GetEdges(words);

                foreach (var edge in edges["left"])
                {
                    // Do something with left edges
                }

                foreach (var edge in edges["mid"])
                {
                    // Do something with mid edges
                }

                foreach (var edge in edges["right"])
                {
                    // Do something with right edges
                }
            }
        }

Example of result:

Blue: Left edge
Green: Mid edge (see dotted list)
Pink: Right edge

[EliotJones]

This looks really good, thanks for taking the time to add it. Just some general comments I think the only one I'd hope to change is the using an enum as the public interface for this but if you disagree tell me so and I'll approve :)

[BobLd]

Should be good to go!