This param controls the maximum allowed length of connected component's contour (blob outline in terms of Tesseract).
I suspect, Tess decided that the dominant color of the text is white and hence it could not construct all blobs' outlines until you've raised the value "edges_maxedgelength" (since the outer outline of the big white blob is very long). One of Tess's notable features is that it can handle inverted text. Though it should be able to get all outlines, and you've helped him to achieve this. Warm regards, Dmitry Silaev On Wed, Mar 16, 2011 at 10:57 AM, Ice Head <iceh...@gmail.com> wrote: > After several try, I found a resolution by changing parameter > "edges_maxedgelength" > Do you know what is the functionalty of this parameter ? > > Thanx, > > Ice > > On Mar 9, 2:12 pm, Ice Head <iceh...@gmail.com> wrote: >> Hi, >> >> I'm using tesseract 3.01 and failed to read simple images like this >> one (see link below) >> >> https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B1... >> >> Is there a way to read this kind of picture ? > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To post to this group, send email to tesseract-ocr@googlegroups.com. > To unsubscribe from this group, send email to > tesseract-ocr+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/tesseract-ocr?hl=en. > > -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to tesseract-ocr@googlegroups.com. To unsubscribe from this group, send email to tesseract-ocr+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en.
