Tesseract ignores tessedit_char_whitelist parameter

[Ľuboš Katrinec]

Hello,

I'm trying to solve captcha images just for fun (or rather a challenge ;-) ). I'm passing tessedit_char_whitelist and tessedit_char_blacklist parameters but somehow they seem to be ignored. Perhaps I just miss something.

> tesseract -c tessedit_char_whitelist=ABCDEFGHIJKLMNOPQRSTUVWXYZ -c tessedit_char_blacklist=abcdefghijklmnopqrstuvwxyz  threshold_problem1.jpeg stdout
Warning. Invalid resolution 0 dpi. Using 70 instead.
R x C Eo e

I'm using a windows version:

> tesseract -v
tesseract 4.00.00alpha
 leptonica-1.74.1
  libgif 4.1.6(?) : libjpeg 8d (libjpeg-turbo 1.5.0) : libpng 1.6.20 : libtiff 4.0.6 : zlib 1.2.8 : libwebp 0.4.3 : libopenjp2 2.1.0

I'm doing it over a JPEG, could that be a problem?

Thanks and regards,

Lubos

[Dan9er]

-c goes at the very end of the command, and you can combine those two arguments. Try this:

> tesseract threshold_problem1.jpeg stdout -c tessedit_char_whitelist=ABCDEFGHIJKLMNOPQRSTUVWXYZ tessedit_char_blacklist=abcdefghijklmnopqrstuvwxyz

[ShreeDevi Kumar]

whitelist parameter does not work with tesseract 4.0x

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

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[Ľuboš Katrinec]

I already tried this, didn't help at all.

[Ľuboš Katrinec]

I used --print-parameters with this version and I could see the parameter in the list included. Do you think it is not used even if listed? It's the same with tessedit_char_blacklist? Is there an alternative?

Thanks and regards,
Lubos

On Saturday, October 14, 2017 at 5:43:16 PM UTC+2, shree wrote:

whitelist parameter does not work with tesseract 4.0x

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Sat, Oct 14, 2017 at 8:25 PM, Dan9er <dan9ert...@gmail.com> wrote:

-c goes at the very end of the command, and you can combine those two arguments. Try this:

> tesseract threshold_problem1.jpeg stdout -c tessedit_char_whitelist=ABCDEFGHIJKLMNOPQRSTUVWXYZ tessedit_char_blacklist=abcdefghijklmnopqrstuvwxyz

On Friday, October 13, 2017 at 5:43:46 AM UTC-4, Ľuboš Katrinec wrote:

Hello,

I'm trying to solve captcha images just for fun (or rather a challenge ;-) ). I'm passing tessedit_char_whitelist and tessedit_char_blacklist parameters but somehow they seem to be ignored. Perhaps I just miss something.

> tesseract -c tessedit_char_whitelist=ABCDEFGHIJKLMNOPQRSTUVWXYZ -c tessedit_char_blacklist=abcdefghijklmnopqrstuvwxyz  threshold_problem1.jpeg stdout
Warning. Invalid resolution 0 dpi. Using 70 instead.
R x C Eo e

I'm using a windows version:

> tesseract -v
tesseract 4.00.00alpha
 leptonica-1.74.1
  libgif 4.1.6(?) : libjpeg 8d (libjpeg-turbo 1.5.0) : libpng 1.6.20 : libtiff 4.0.6 : zlib 1.2.8 : libwebp 0.4.3 : libopenjp2 2.1.0

I'm doing it over a JPEG, could that be a problem?

Thanks and regards,

Lubos

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[Quan Nguyen]

https://github.com/tesseract-ocr/tesseract/issues/751

Use current version 3.05.x, if possible.