Tesseract-ocr installation on Sagemaker notebooks

Question

Hi,

One of the python packages that I use to convert pdf files to text has the dependency of tesseract-ocr. I tried to install using the below command using terminal

```
sudo yum install tesseract-ocr
```
However, I get the following error

> Loaded plugins: dkms-build-requires, extras_suggestions, kernel-livepatch, langpacks, priorities, update-motd, versionlock
> https://download.docker.com/linux/centos/2/x86_64/stable/repodata/repomd.xml: > [Errno 14] HTTPS Error 404 - Not Found
> Trying other mirror.
> 63 packages excluded due to repository priority protections
> No package tesseract-ocr available.

I have tried to install it according to [this link](https://blog.hikmahtechnologies.com/installing-tesseract-on-amazon-linux-2-4a08517eb2f1), but still facing the same issues. Any help would be highly appreciated.

Thanks

NARRAVULA MUNISAI TEJA · Accepted Answer

Hii,

> **The error you're encountering is due to the SageMaker Notebook instance trying to access a Docker repository that is not available or accessible. This is likely because the SageMaker Notebook instance is running on Amazon Linux, which is different from CentOS.**

**1.Remove the Docker repository:** First, remove the Docker repository that is causing the error by running the following command:
```
$ sudo rm -rf /etc/yum.repos.d/docker.repo
```
**2.Clean the package manager cache:** Next, clean the package manager cache by running the following command:
```
$ sudo yum clean all
```
**3.Update the package manager:** Update the package manager by running the following command:
```
$ sudo yum update -y
```

After completing these steps, you should be able to proceed with the installation of Tesseract OCR as described in my previous response.

**If you still encounter issues,** you can try installing Tesseract OCR using the Amazon Linux Extra packages repository. Follow these steps:

**1.Enable the Amazon Linux Extra packages repository:** Run the following command to enable the Amazon Linux Extra packages repository:
```
$ sudo amazon-linux-extras install epel
```
**2.Install Tesseract OCR:** After enabling the repository, you should be able to install Tesseract OCR by running the following command:

```
$ sudo yum install tesseract
```
This should install Tesseract OCR and its dependencies on your SageMaker Notebook instance.

Links:

**Amazon Linux 2 Extras Library (for installing Tesseract OCR):**
https://aws.amazon.com/premiumsupport/knowledge-center/ec2-install-extras-repository/

Makendran G · Answer

To upgrade Tesseract OCR to versions 3.05 or higher on Amazon Linux 2, you'll need to compile it from source, as the default repositories don't provide newer versions. Here's a detailed steps on how to do this:

1. First, remove the existing Tesseract installation:

```
sudo yum remove tesseract
```

2. Install the necessary dependencies:

```
sudo yum install -y autoconf automake libtool libpng-devel libjpeg-devel libtiff-devel zlib-devel libwebp-devel gcc-c++ make
```

3. Install Leptonica, which is required for Tesseract:

```
wget http://www.leptonica.org/source/leptonica-x.xx.x.tar.gz
tar -xzvf leptonica-x.xx.x.tar.gz
cd leptonica-x.xx.x
./configure
make
sudo make install
sudo ldconfig
pkg-config --modversion lept
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
```

4. Download and compile Tesseract from source:

```
wget https://github.com/tesseract-ocr/tesseract/archive/4.1.1.tar.gz
tar xzvf 4.1.1.tar.gz
cd tesseract-4.1.1
./autogen.sh
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
./configure
make
sudo make install
sudo ldconfig
```

5. Verify the installation:

```
tesseract --version
```

This should show the newly installed version of Tesseract.

Didier_Durand · Answer

Hi,

You install to add Repel to the repos to be accessed by yum to access terreract-ocr:

```
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum -y update
```

Then, yum install should succeed.

To make that the repo above was added, you can also run `yum repolist` to get the list of repos known by yum after your command.

Best,

Didier

Tesseract-ocr installation on Sagemaker notebooks

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