CODEWITHSUNDEEP
ocrtesseracttess4j
Bhushan
Bhushan

Reputation: 1547

Tesseract user-pattern is not applied

I want to do OCR on this image.enter image description here This is pre-define format. ie first five will characters, then next four will be digits and last will be character.

When I execute following command

$ tesseract in.png stdout

I get output as BDVPD474SQ

So, I went for user-pattern. I created a file(in directory /usr/share/tesseract-ocr/tessdata/configs) named as bazaar (its content is as follow)

load_system_dawg     F
load_freq_dawg       F
user_patterns_suffix user-patterns

I also created a file, named as eng.user-patterns in directory /usr/share/tesseract-ocr/tessdata (its content is as follow)

\A\A\A\A\A\d\d\d\d\A

Still, I am getting same result

$ tesseract in.png stdout bazaar
BDVPD474SQ

What I am doing wrong ? Has anyone accomplished this by Tess4j ?

Upvotes: 10

Views: 2718

Answers (1)

tacon
tacon

Reputation: 427

You can add the option --oem 0 to ensure user patterns apply. See this PR comment.

Since I am on tesseract 5.3.3, I had to tweak your input image to reproduce a similar behavior:

enter image description here

I specify the user pattern \A\A\A\A\A\d\d\d\A\A, to force recognition of the partially erased 9 character as a letter.

With --oem 0, Tesseract returns BDVPD474SQ (it reads an S).

Without the option, Tesseract returns BDVPD474SQ (identifying a 5).

Upvotes: 0

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