Recurring error

[thiswillbeyourgithub]

Hi, I frequently have this error message :

Cancelled OCR processing with message :
['Traceback (most recent call last):\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/gui.py", line 56, in on_run_ocr\n ocr.run_ocr_on_notes(note_ids=selected_nids)\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/ocr.py", line 306, in run_ocr_on_notes\n notes_query = self.run_ocr_on_query(note_ids=note_ids)\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/ocr.py", line 285, in run_ocr_on_query\n raw_results = self._ocr_unbatched_process(image_paths=image_paths)\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/ocr.py", line 149, in _ocr_unbatched_process\n raw_results[image_path] = future.result()\n', ' File "concurrent/futures/_base.py", line 432, in result\n', ' File "concurrent/futures/_base.py", line 388, in __get_result\n', ' File "concurrent/futures/thread.py", line 57, in run\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/ocr.py", line 262, in _ocr_img\n return pytesseract.image_to_string(str(img_pth), lang="+".join(languages or ["eng"]),\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/_vendor/pytesseract/pytesseract.py", line 368, in image_to_string\n return {\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/_vendor/pytesseract/pytesseract.py", line 371, in \n Output.STRING: lambda: run_and_get_output(*args),\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/_vendor/pytesseract/pytesseract.py", line 280, in run_and_get_output\n run_tesseract(**kwargs)\n', ' File "/home/USERNAME/.local/share/Anki2/addons21/450181164/_vendor/pytesseract/pytesseract.py", line 257, in run_tesseract\n raise TesseractError(proc.returncode, get_errors(error_string))\n', '450181164._vendor.pytesseract.pytesseract.TesseractError: (-11, "read_params_file: Can't open txt read_params_file: Can't open txt Tesseract Open Source OCR Engine v4.0.0-beta.1 with Leptonica Detected 33 diacritics contains_unichar_id(unichar_id):Error:Assert failed:in file ../ccutil/unicharset.h, line 513")\n']

My OS is ubuntu 18, anki version is 2.1.35. I have the latest ankiOCR available for this anki version.

It happens without me understanding what kind of notes causes it. I had it with some text of my lesson that used weird characters (like the female and male thingie like ♂️ ) but it also happenned to random image occlusions.

Unfortunately, this error can happen after having ankiocr running through hundreds of cards in a row without saving the changes :/ So I have to redo it over and over again until I find the culprit cards.

Let me know if I can help you troubleshoot that :)

[thiswillbeyourgithub]

Apparently I found a fix. I have no idea what it does, I just followed advice there : tesseract-ocr/tesseract#1205

I'll make a PR right away

[thiswillbeyourgithub]

Feel free to close this

[cfculhane]

Thanks! I'll look into this when I get a chance, flat out with uni at the moment.

…

On Fri, 21 May 2021, 10:28 pm thiswillbeyourgithub, < ***@***.***> wrote: Feel free to close this — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#20 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AJRYIUYC4I645BJMKNZZHKLTOZGV7ANCNFSM44SV6V5A> .

[cfculhane]

Oh I just saw how simple the fix was. I'll merge tomorrow, thanks for looking into this and solving it!!

…

On Fri, 21 May 2021, 10:39 pm Chris Culhane, ***@***.***> wrote: Thanks! I'll look into this when I get a chance, flat out with uni at the moment. On Fri, 21 May 2021, 10:28 pm thiswillbeyourgithub, < ***@***.***> wrote: > Feel free to close this > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > <#20 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AJRYIUYC4I645BJMKNZZHKLTOZGV7ANCNFSM44SV6V5A> > . >

[thiswillbeyourgithub]

Flat out with uni too :) good luck with your exams!

Beware, I have no idea if this fix causes issue on other setups. Maybe it's just my installation of pytesseract or linux integration, who knows...

[cfculhane]

Closed with new release

[thiswillbeyourgithub]

Just a heads up: it seems I've been having consistently better results using the following tesseract config : --oem 2 --psm 12 -c preserve_interword_spaces=1

relevant documentation :

 --psm N
     Set Tesseract to only run a subset of layout analysis and assume a
     certain form of image. The options for N are:
         0 = Orientation and script detection (OSD) only.
         1 = Automatic page segmentation with OSD.
         2 = Automatic page segmentation, but no OSD, or OCR. (not implemented)
         3 = Fully automatic page segmentation, but no OSD. (Default)
         4 = Assume a single column of text of variable sizes.
         5 = Assume a single uniform block of vertically aligned text.
         6 = Assume a single uniform block of text.
         7 = Treat the image as a single text line.
         8 = Treat the image as a single word.
         9 = Treat the image as a single word in a circle.
         10 = Treat the image as a single character.
         11 = Sparse text. Find as much text as possible in no particular order.
         12 = Sparse text with OSD.
         13 = Raw line. Treat the image as a single text line,
              bypassing hacks that are Tesseract-specific.
 --oem N
           Specify OCR Engine mode. The options for N are:
               0 = Original Tesseract only.
               1 = Neural nets LSTM only.
               2 = Tesseract + LSTM.
               3 = Default, based on what is available.

I think that changing the oem value can be a breaking change because it depends on which engine is present on the user's computer but the 2 other flags seem like a free meal.