hi, $ tesseract 205c.tif 205c --psm 6 -c tessedit_char_whitelist=ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789=+& as per my knowledge tessedit_char_whitelist works with tesseract 3 not with tesseract 4.
On Mon, Dec 23, 2019 at 3:10 PM Nicholas Rees <[email protected]> wrote: > Below is a bug report that I'm considering making. However, I'm not > entirely positive that its a bug and I'd like someone who knows more about > this to check this and make sure that this is a bug so I'm not wasting > anyone's time. > > The following is the bug report that I'll post if you guys think its right. > > > ### Environment > > * **Tesseract Version**: > tesseract 4.1.0 > leptonica-1.78.0 > libgif 5.1.4 : libjpeg 8d (libjpeg-turbo 2.0.2) : libpng 1.6.37 : libtiff > 4.1.0 : zlib 1.2.11 : libwebp 1.0.3 > Found AVX2 > Found AVX > Found SSE > Found libarchive 3.4.0 zlib/1.2.11 liblzma/5.2.4 bz2lib/1.0.8 liblz4/1.9.2 > libzstd/1.4.3 > * **Commit Number**: > From pacman Arch repository (NOT THE AUR) > * **Platform**: Linux NickArch 5.4.3-arch1-1 #1 SMP PREEMPT Fri, 13 Dec > 2019 09:39:02 +0000 x86_64 GNU/Linux > > ### Current Behavior: > Sample Image link: https://imgur.com/a/TNH3tOx > > Tesseract will interpret certain characters weirdly (i.e. F as the yen > symbol, or E as sometimes '='). The following command correctly whitelists > the characters that will appear on the pages, and almost completely > eliminates that problem: > > $ tesseract 205c.tif 205c --psm 6 -c > tessedit_char_whitelist=ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789=+& > > However, since the images are formatted like a table, tesseract will not > recognize the smaller spaces in the third column. To fix that issue, I can > run the following command. > > $ tesseract 205c.tif 205c --psm 6 -c tosp_min_sane_kn_sp=0.0 > > This command completely fixes the spacing problem. However, the previous > command obviously does not whitelist the characters so there are many more > errors. So I need to run the -c arguments together. I do this by using a > config file: > > config_file: > tosp_min_sane_kn_sp 0.0 > tessedit_char_whitelist ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789=+& > > Then I run > > $ tesseract 205c.tif 205c --psm 6 config_file > > Tesseract will always ignore one of these options no matter what I do. > Maybe I'm doing it wrong, but I've followed what other config files have > shown and other command line options. However, I've also tried running the > command with more than one -c option. In both cases I cannot get both > config variables to work together. > > ### Expected Behavior: > $ Tesseract --help-extra > "-c VAR=VALUE Set value for config variables. > Multiple -c arguments > are allowed." > ### Suggested Fix: > I'm not even sure if this is a bug, but it definitely seems like it to me. > I don't think I have the expertise to look into why this isn't working. > Maybe I'm wrong here. > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/a552cd6a-2c06-4d79-80ec-a973aaecf2fa%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/a552cd6a-2c06-4d79-80ec-a973aaecf2fa%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Thanks & regards, Ashwini -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAHxwgLiFoyYzORLzwFf7x2P498JzymVSDLejw0%2BnMjgRj6qeNA%40mail.gmail.com.
