Dear Jon,
Beginning for analyzing; I try also to detect lines, corners; but results are not good. I think due to images are low contrast. Please try to analyze with some data line profiles: ROI-left-profile: https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576706091073985 362 ROI-top-profile: https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576706094761082 706 ROI-right-profile: https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576706102033630 978 ROI-bottom-profile: https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576706106389606 898 After doing ROI detection, may be you need to align image. My solution for this step is: - detect all lines (Hough transform approach), and then keep all lines have slops are similar to horizontal lines. - Estimate base-slop based on mean slop - Align image Here are detected lines: https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576709473940745 778 Hope it's helpful to you! Good luck, Cong. -- 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.
