With psm 0, Tesseract does not perform normal OCR function but analyzes layout; it produces such characteristics as Orientation, Writing Direction, and Textline Order. Check Tess4J unit tests for usage of OSD.
On Sunday, May 11, 2014 5:48:39 AM UTC-5, Joe Aspara wrote: > > I'm struggling with the OSD function of Tesseract 3.02. > I tried the standalone version via command line and the Tess4J version > too, but I always obtain an error with different input types. > > I downloaded the osd.traineddata for version 3.01 (I guess no such file > still exist for v3.02) from here > https://code.google.com/p/tesseract-ocr/downloads/detail?name=tesseract-ocr-3.01.osd.tar.gz&can=2&q= > and I copied it properly in the TESSDATA folder > > Below my experiments: > > COMMAND LINE > tesseract input_image output_text -l eng -psm 0 > response: Error during processing. > > With psm = 1 it read text with very bad quality, with psm = 2 or 3 it give > my empty output. > > As far as I know only 0 and 1 values perform OSD! From the reference: > 0 = Orientation and script detection (OSD) only. > 1 = Automatic page segmentation with OSD. > > > TESS4J > Tesseract instance = Tesseract.getInstance(); > instance.setLanguage("ita"); > instance.setPageSegMode(TessPageSegMode.PSM_AUTO_OSD); > String result = instance.doOCR(myImage); > > result always is empty at the end > > To know the input orientation it's critical for my project but at now I'm > not able to find a way to accomplish this. > > I hope somebody can help me! Thanks in advance > > -- 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 http://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/ceb3294d-679e-42a5-b625-e26303849340%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
