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] <javascript:>> 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
>>>
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