Hi Timo, I tried the line removal example [1] included with leptonica, I have had luck before using it with tesseract for images with horizontal lines. I didn't manipulate the pdf beyond converting it to a grayscale image and rotating it, my ghostscript won't handle your parameters for some reason. This is the unadorned image without the horizontal lines [2] and these are the results [3]. Not 100% but I think more than 30% and maybe an approach to consider.
art --- 1. http://www.leptonica.com/line-removal.html 2. https://drive.google.com/file/d/0B-PK1n92dlzwalM1bTRtb0FiMVU/view?usp=sharing 3. https://drive.google.com/file/d/0B-PK1n92dlzweDl5aWFPd0pDQnc/view?usp=sharing -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CY1PR11MB055512075D34874F7B47DA31DCC50%40CY1PR11MB0555.namprd11.prod.outlook.com. For more options, visit https://groups.google.com/d/optout.
