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I'm trying to work with text recognition on raspberry pi for a project of mine. I've installed tesseract ocr v4.0.0 beta on my Windows computer, and I'm trying to install this version as well on the RPi, but I only manage to install the 3.0.3 version. I don't know if it is possible to install de 4.x beta on RPi.

I assume it must be possibe since on the github page there is an installation guide for some Linux distros. The one I tried is for Debian Strech, since Raspian is based on this, but well, it installed 3.0.3.

I was wondering is anyone can tell me if this is possible or has a guide for me to achieve this.

  • It looks like you're going to have to build it from git. Try these instructions. – HeatfanJohn Sep 20 '18 at 0:56
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    Please note that questions should not be cross posted to multiple sites on the Stackexchange network. Please pick one and delete the other. Thanks. – Ghanima Sep 20 '18 at 10:08
  • @HeatfanJohn thank you! I'll try this and let you know! – Jhon Sep 20 '18 at 12:45
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Raspbian is Debian based therefore we should follow the instructions for installing on Debian.

However following these instructions shows that this repo doesn't support the armhf architecture.

N: Skipping acquire of configured file 'main/binary-armhf/Packages' as repository 'https://notesalexp.org/tesseract-ocr/stretch stretch InRelease' doesn't support architecture 'armhf'

I was able to build from the Git source and install using the following commands from these instructions:

$ git clone --depth 1  https://github.com/tesseract-ocr/tesseract.git 
$ cd tesseract-ocr/
$ ./autogen.sh
$ ./configure
$ make
$ sudo make install
$ sudo ldconfig
$ tesseract -v

tesseract 4.0.0-beta.3
leptonica-1.74.1
libgif 5.1.4 : libjpeg 6b (libjpeg-turbo 1.5.1) : libpng 1.6.28 : libtiff 4.0.8 : zlib 1.2.8 : libwebp 0.5.2 : libopenjp2 2.1.2

Hey, guess what ... it works!

$ tesseract img.png outputbase
Tesseract Open Source OCR Engine v4.0.0-beta.3 with Leptonica

$ more outputbase.txt
The (quick) [brown] {fox} jumps!
Over the $43,456.78 <lazy> #90 dog
& duck/goose, as 12.5% of E-mail
from aspammer@website.com is spam.
Der ,schnelle” braune Fuchs springt
iiber den faulen Hund. Le renard brun
«rapide» saute par-dessus le chien
paresseux. La volpe marrone rapida
salta sopra il cane pigro. El zorro
marron ripido salta sobre el perro
perezoso. A raposa marrom ripida
salta sobre o cdo preguigoso.

For this image: Test image for OCR

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  • Hello, thank you for you answer! I tried it, but I'm getting the error that is suggested in the compiling guide you left me on the comment. I tried using the autorecong -i but it didn't work. Do you think I have to first install tesseract-ocr via apt install and then tried the compiling guide ? Thanks! – Jhon Sep 22 '18 at 2:22
  • @Jhon I didn't have to install tesseract-ocr. I'm Raspbian Stretch 9. What version are you running? – HeatfanJohn Sep 22 '18 at 3:07
  • Raspbian 8 (jessie) – Jhon Sep 22 '18 at 3:44
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    Are you able to upgrade to Raspbian 9 Stretch or try using a different SD Card with Stretch preinstalled. I didn't have any issues building OpenCV on Stretch. Although it was built for Python 3 and the opencv-people-counter project is using Python 2 syntax. – HeatfanJohn Sep 23 '18 at 17:51
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    I'd like to thank you a lot man! It worked with Raspbian 9! – Jhon Sep 24 '18 at 13:08
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you'll find a version 4 in the stretch-backports repository.

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  • OP is running Raspbian Jessie and AFAIK there is no Raspbian Stretch backports repo. How should OP install it? – Dirk Sep 20 '18 at 12:34
  • He can use the arm packages from debian stretch-backports. armel or armhf, depending on his hardware. – Gerard H. Pille Sep 20 '18 at 12:37
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    I don't think you should assume OP knows this. Maybe you should update your answer with this information – Dirk Sep 20 '18 at 12:38

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