Dear Jon,
Try to analyze with some preprocessing steps as belows: Step1: Detect ROI https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576366756516993 234 Setp2: Apply low-pass fft filter, with parameters: - intensity threshold is 130 - fft cutoff: 15% https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576366759922523 650 Step3: Scale image with scale factor https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576366756371708 834 Step4: try to recognize use Tesseract/others https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576366764338605 922 Step5: post-processing requires???? Good luck, Cong. From: tesseract-ocr@googlegroups.com [mailto:tesseract-ocr@googlegroups.com] On Behalf Of Jon Andersen Sent: Monday, February 21, 2011 10:46 PM To: tesseract-ocr@googlegroups.com Subject: Re: Image pre-processing for good OCR results Whoops, sorry - links were broken for a bit. I just fixed the image links, they should work now. Thanks!! -Jon -- 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.
