your tesseract version is old. Current version is 4.1 (or dev version is 5.0). For 4.x and above you can you different tessdata: best, fast or with 3.x module.
Zdenko št 19. 9. 2019 o 11:55 'Sandra M.' via tesseract-ocr < [email protected]> napísal(a): > I use Tesseract 3.02 leptonica-1.68. What do you mean with tessdata_best? > I'm new in this field and just know how to call tesseract with the given > code line.... How can the resolution be 0 dpi? > > I'm using this Python code: > > import pytesseractimport argparseimport cv2import os > # construct the argument parse and parse the arguments > ap = argparse.ArgumentParser() > ap.add_argument("-i", "--image", required=True, > help="path to input image to be OCR'd") > args = vars(ap.parse_args()) > # load the example image and convert it to grayscale > image = cv2.imread(args["image"]) > gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) > # write the grayscale image to disk as a temporary file so we can# apply OCR > to it > filename = "{}.png".format(os.getpid()) > cv2.imwrite(filename, gray) > # load the image as a PIL/Pillow image, apply OCR, and then delete# the > temporary file > text = pytesseract.image_to_string(gray)print("Output: " + text) > > > Am Donnerstag, 19. September 2019 11:23:50 UTC+2 schrieb zdenop: >> >> Please provide more information (versions info, how you do OCR - seem >> like you use some coding). >> I just tried tesseract (tesseract 5.0.0-alpha-416-g408d6) command line >> with tessdata_best and if work for me: >> tesseract unnamed.png - >> Warning: Invalid resolution 0 dpi. Using 70 instead. >> Estimating resolution as 497 >> Calibrations >> >> Zdenko >> >> >> št 19. 9. 2019 o 10:43 'Sandra M.' via tesseract-ocr < >> [email protected]> napísal(a): >> >>> [image: currentImage.png] >>> @Lorenzo Blz: This is an example image. The output of my code is >>> "calibrations". The height of the letters is not the same. Of course it >>> cannot be recognized if there is only a "c", but in the context to the >>> other letters tesseract should be able to detect if it is a small or >>> capital letter, I think. This image has no noise or anything else, I don't >>> unterstand the problem. But nevertheless, your comment to change the size >>> helped! If I resize it with 150% or 75% for example, it works. I just don't >>> know how to solve it if I don't have a reference value later on. How to >>> decide which is the right spelling, 100% image size or 150%. Or is it >>> possible to say that it's always a more reliable result if I resize the >>> image in preprocessing? >>> >>> Am Mittwoch, 18. September 2019 17:19:22 UTC+2 schrieb Sandra M.: >>>> >>>> I'm using Tesseract with Python. I have an image with 1-6 words in it >>>> and need to read the text. Sometimes the character "C", which look the same >>>> in upper and lower case, is detected as lower case c instead of upper case >>>> C. I see the problem, but in context to the following letters it should be >>>> possible to detect the right notation. Is there any configuration or >>>> something to improve this? >>>> >>>> I had a look at the configuration options of config='-psm x' with >>>> different values for x, but nothing fits to my problem >>>> >>> -- >>> 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 view this discussion on the web visit >>> https://groups.google.com/d/msgid/tesseract-ocr/e4ed704a-cee0-4bb2-80ae-9fc9b82ab55d%40googlegroups.com >>> <https://groups.google.com/d/msgid/tesseract-ocr/e4ed704a-cee0-4bb2-80ae-9fc9b82ab55d%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/9faf77f7-c862-47f6-b01d-629773025a7f%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/9faf77f7-c862-47f6-b01d-629773025a7f%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAJbzG8xdhC6Nne9D52q_nk8u%2BnHjA-%2BvQpDb%3D3c5FfuLdNEeKA%40mail.gmail.com.
