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95 lines
3.6 KiB
Markdown
95 lines
3.6 KiB
Markdown
# Clear Linux* OS `tesseract-ocr` container image
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<!-- Required -->
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## What is this image?
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`clearlinux/tesseract-ocr` is a Docker image with OCR engine `libtesseract` and cmdline tool `tesseract`
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on top of the [official clearlinux base image](https://hub.docker.com/_/clearlinux).
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<!-- application introduction -->
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> [tesseract](https://github.com/tesseract-ocr/tesseract) is an open source
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> optical character recognition (OCR) platform. OCR extracts text from images and
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> documents without a text layer and outputs the document into a new searchable text file,
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> PDF, or most other popular formats.
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For other Clear Linux* OS
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based container images, see: https://hub.docker.com/u/clearlinux
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## Why use a clearlinux based image?
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<!-- CL introduction -->
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> [Clear Linux* OS](https://clearlinux.org/) is an open source, rolling release
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> Linux distribution optimized for performance and security, from the Cloud to
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> the Edge, designed for customization, and manageability.
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Clear Linux* OS based container images use:
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* Optimized libraries that are compiled with latest compiler versions and
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flags.
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* Software packages that follow upstream source closely and update frequently.
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* An aggressive security model and best practices for CVE patching.
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* A multi-staged build approach to keep a reduced container image size.
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* The same container syntax as the official images to make getting started
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easy.
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To learn more about Clear Linux* OS, visit: https://clearlinux.org.
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## Deployment:
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### Deploy with Docker
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The easiest way to get started with this image is by simply pulling it from
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Docker Hub.
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1. Pull the image from Docker Hub:
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```
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docker pull clearlinux/tesseract-ocr
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```
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2. Start a container using the examples below
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```
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docker run --rm -it --name myapp -v "$PWD":/app -w /app clearlinux/tesseract-ocr tesseract xxx.tiff stdout --oem 1
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```
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or if trained data for language is in $PWD,
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```
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docker run --rm -it --name myapp -e "TESSDATA_PREFIX=/app" -v "$PWD":/app -w /app clearlinux/tesseract-ocr tesseract xxx.tiff stdout --oem 1
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```
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<!-- Required -->
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## Build and modify:
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The Dockerfiles for all Clear Linux* OS based container images are available at
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https://github.com/clearlinux/dockerfiles. These can be used to build and
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modify the container images.
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1. Clone the clearlinux/dockerfiles repository.
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```
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git clone https://github.com/clearlinux/dockerfiles.git
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```
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2. Change to the directory of the application:
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```
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cd tesseract-ocr/
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```
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3. Build the container image:
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```
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docker build -t clearlinux/tesseract-ocr .
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```
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4. Please refer to [create custom application container image](https://docs.01.org/clearlinux/latest/guides/maintenance/container-image-modify.html) on how to customize your container image with specific debug capabilities, such as: make, git.
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Refer to the Docker documentation for [default build arguments](https://docs.docker.com/engine/reference/builder/#arg).
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Additionally:
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- `swupd_args` - specifies arguments to pass to the Clear Linux* OS software
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manager. See the [swupd man pages](https://github.com/clearlinux/swupd-client/blob/master/docs/swupd.1.rst#options)
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for more information.
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## note:
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> The container doesn't include any trained data for language. You need download specific language file from
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> https://github.com/tesseract-ocr/tessdata and copy to /usr/share/tessdata, e.g to support English, you need copy eng.traineddata.
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<!-- Required -->
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## Licenses
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All licenses for the Clear Linux* Project and distributed software can be found
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at https://clearlinux.org/terms-and-policies
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