--- title: Install Offline Screen Region OCR on CentOS using the Snap Store | Snapcraft description: Get the latest version of Offline Screen Region OCR for on CentOS - Offline screen region capture and optical character recognition grabber url: https://snapcraft.io/install/screen-ocr-grabber/centos --- [Canonical Snapcraft](https://snapcraft.io/) # Install Offline Screen Region OCR on **CentOS** # Offline Screen Region OCR (screen-ocr-grabber) [Nguyen Van Thanh (thanhnv128)](https://snapcraft.io/publisher/thanhnv128 "View all snaps from Nguyen Van Thanh (thanhnv128)") * [Nguyen Van Thanh (thanhnv128)](https://snapcraft.io/publisher/thanhnv128 "View all snaps from Nguyen Van Thanh (thanhnv128)") * [Utilities](https://snapcraft.io/search?categories=utilities) [Install](https://snapcraft.io/install/screen-ocr-grabber/centos#install) #### Offline screen region capture and optical character recognition grabber Offline Screen Region OCR is an independent open-source Linux alternative to Capture2Text and Text Grab for instant offline screen-region text extraction and clipboard capture. It is not affiliated with, sponsored by, or endorsed by the authors of Capture2Text or Text Grab. FEATURES * Translucent Crosshair Region Snipper: Capture any screen rectangle across single or multi-monitor X11 desktops using a fullscreen rubber-band overlay or global X11 hotkey (Ctrl+Alt+T), or load PNG/JPG files and clipboard images. * Image Preprocessing Pipeline: Automatic 1x/2x/3x smooth upscaling for crisp small UI fonts, grayscale contrast normalization, optional dark-background auto-inversion, Otsu adaptive thresholding, and quiet border padding. * Bundled Offline Tesseract 4 OCR Engine: Zero cloud uploads — ships complete offline English (eng) and Vietnamese (vie) language models with selectable page segmentation modes (Auto, Single Block, Single Line, Sparse Text). * Instant Clipboard & Live Confidence Metrics: Copies recognized text directly to the system clipboard alongside word count, character count, and mean Tesseract per-word confidence score. * SQLite OCR History & Export: Browse searchable capture history with saved region thumbnails, re-copy past extractions, and export to TXT, Markdown, or UTF-8 CSV files. SUPPORT & DONATE * Created by Thanh Nguyen — ### Package name * screen-ocr-grabber --- ### License * MIT --- ### Last updated * 14 November 2026 - latest/stable --- ### Websites * [buymeacoffee.com](https://buymeacoffee.com/thanhnv128b "https://buymeacoffee.com/thanhnv128b") --- ### Contact * [buymeacoffee.com](https://buymeacoffee.com/thanhnv128b "https://buymeacoffee.com/thanhnv128b") --- ##### Report a Snap Store violation * [Report this Snap](https://snapcraft.io/install/screen-ocr-grabber/centos#report-snap-modal) --- [See more information about screen-ocr-grabber ›](https://snapcraft.io/screen-ocr-grabber) ## Enable snaps on CentOS and install Offline Screen Region OCR Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully. Snaps are discoverable and installable from the [Snap Store](https://snapcraft.io/store), an app store with an audience of millions. ### Enable snapd Snap is available for [CentOS 7.6+](https://snapcraft.io/install/screen-ocr-grabber/centos), and Red Hat Enterprise Linux 7.6+, from the [Extra Packages for Enterprise Linux](https://fedoraproject.org/wiki/EPEL) (EPEL) repository. The EPEL repository can be added to your system with the following command: ``` sudo yum install epel-release ``` Snap can now be installed as follows: ``` sudo yum install snapd ``` Once installed, the *systemd* unit that manages the main snap communication socket needs to be enabled: ``` sudo systemctl enable --now snapd.socket ``` To enable *classic* snap support, enter the following to create a symbolic link between `/var/lib/snapd/snap` and `/snap`: ``` sudo ln -s /var/lib/snapd/snap /snap ``` Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly. ### Install Offline Screen Region OCR To install Offline Screen Region OCR, simply use the following command: ``` sudo snap install screen-ocr-grabber ``` ### Other popular snaps… [See more...](https://snapcraft.io/search?categories=featured) [See more in Featured](https://snapcraft.io/search?categories=featured) ### More things to do… #### [Get the snap store](https://snapcraft.io/snap-store) Browse and find snaps from the convenience of your desktop using the snap store snap. #### [Learn more about snaps](https://snapcraft.io/docs) Interested to find out more about snaps? Want to publish your own application? Visit [snapcraft.io](https://snapcraft.io/) now. [Back to top](https://snapcraft.io/install/screen-ocr-grabber/centos) © 2026 Canonical Ltd. Ubuntu and Canonical are registered trademarks of Canonical Ltd. 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