That looks like it's probably a character encoding issue with how
pytesseract constructs/uses its command line. You might try putting the
what list in a config file and passing that instead to work around the
issue.
You don't mention what language model(s) you are using. If you are using
eng+grc, you might try script/Latin+script/Greek to see if it improves
things.
Tom
On Tuesday, April 1, 2025 at 9:22:12 PM UTC-4 kylefo...@gmail.com wrote:
> I'm using Tesseract with Python because it's too difficult to OCR when the
> languages are mixed between the Greek alphabet and the Latin alphabet. I
> was hoping that the whitelist feature would solve that problem. But this
> is not the case. When I input the following whitelist,
>
>
> αςερτυθιοπλκξηγφδσζχψωβνμΣΕΡΤΥΘΙΟΠΛΚΞΗΓΦΔΣΑΖΧΨΩΒΝΜΑΖΧΨΩΒΝΜABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890\/?<>{}[]()*&,;.:-+=|1234567890
>
>
> I get a reasonably good output for the Latin characters, but the Greek
> text is only roughly 75% accurate. for example, here is an output
>
>
>
> Contracted nouns and adjectives in -ους from -οος 63
> Adjectives of material in -ots from -εος 64
> Nouns in ts, -εως and -υς/-υ, -εως 65
>
> But the correct output should be οῦς not -ots
>
>
> However, even if the accuracy were 100%, that whitelist will not solve my
> problem because it does not use the diacritics. So when I use a whitelist
> with diacritics, such as
>
>
> "ΆᾺΑἉἊἍἋἌᾍᾈᾌᾎᾉAΒΔΗΉἩἨἮἯἬἫἭἪῌᾞᾟᾜᾘᾙῊἜἚἝἛἘἙΈΕΓΙῚἾἿἽἻἺἼἹἸΊIΚΧΞΛΜΝὩὨῼὭὫὬὪὯὮΩΏ
> ὉὈὊὋὌὍΟΌῸῺᾨᾩᾯᾮᾪᾫᾬᾭΠΦΨῬΡΣΤΘὝὛὙΎΥὟΖᾅᾳᾇᾄᾂᾀᾷᾆᾴᾲἇἆἂἄἅἃάᾶὰαἁἀααᾁᾃβδέὲἕἓἒἔἑἐε
> ἠῆᾖἧᾔᾐᾑἥἣᾕἡἦῄῂῇᾗηῃήὴἤἢᾒᾓγϊῖιἰἶἴἲἱΐῒὶίἷἵἳῗιικχλμνὁᾦὀοῷὧω
> ὠᾡὦῳῶὡᾠᾧῴῲὢὤὥὣᾤᾢὅὃὄὂόὸώὼᾣᾥπφψῤῥρςστθὖϋὗῧὐὑυῦὔὒύὺὓὕῢΰυυϝξζΑΖΧΨΩΒΝΜABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890\/?<>{}[]()*&,;.:-+=|1234567890
>
> "
>
> I get the output:
>
> ΝΕΗΟΓΑΑΠΚ
> Α
> ΑΟΗΠΓΠΟΠ
> ΑΟΕΠΓ
> ΑΕΠΓΟ
> ΑΠ
> ἸΑΓΝΠΑΟΕΕ
> ΡΟΡΟΠ
> ΑΙΟΓΠΊ
> ΠΟΙΠΕΟΓΠΓΕΠΟΏΡΒΡ
> ΑΓ Ι
> ΙΠΠΠΠΊΒΠ
>
> I've tried locating the characters that are messing things up but there
> are too many. But it is certainly not any of these characters:
> \/?<>{}[]()*&,;.:-+=|
>
> The image I'm trying to scan is uploaded. here is the exact python code
> I'm using:
>
> ```
> import pytesseract
> custom_oem_psm_config = '--oem 3 --psm 6 -c tessedit_char_whitelist="{}"'
> .format(
> "ΆᾺΑἉἊἍἋἌᾍᾈᾌᾎᾉAΒΔΗΉἩἨἮἯἬἫἭἪῌᾞᾟᾜᾘᾙῊἜἚἝἛἘἙΈΕΓΙῚἾἿἽἻἺἼἹἸΊIΚΧΞΛΜΝὩὨῼὭὫὬὪὯὮΩΏ
> ὉὈὊὋὌὍΟΌῸῺᾨᾩᾯᾮᾪᾫᾬᾭΠΦΨῬΡΣΤΘὝὛὙΎΥὟΖᾅᾳᾇᾄᾂᾀᾷᾆᾴᾲἇἆἂἄἅἃάᾶὰαἁἀααᾁᾃβδέὲἕἓἒἔἑἐε
> ἠῆᾖἧᾔᾐᾑἥἣᾕἡἦῄῂῇᾗηῃήὴἤἢᾒᾓγϊῖιἰἶἴἲἱΐῒὶίἷἵἳῗιικχλμνὁᾦὀοῷὧω
> ὠᾡὦῳῶὡᾠᾧῴῲὢὤὥὣᾤᾢὅὃὄὂόὸώὼᾣᾥπφψῤῥρςστθὖϋὗῧὐὑυῦὔὒύὺὓὕῢΰυυϝξζΑΖΧΨΩΒΝΜABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890\/?<>{}[]()*&,;.:-+=|
>
> "
> )
> str4 = pytesseract.image_to_string(img1, config=custom_oem_psm_config,lang
> ='eng+ell')
> print(str4)
> ```
>
> I'm using pytesseract 0.3.13 and I have tesseract 5.3.8 installed.
>
>
>
>
>
>
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