https://github.com/MohrJonas/obsidian-ocr
Obsidian OCR allows you to search for text in your images and pdfs
https://github.com/MohrJonas/obsidian-ocr
hacktoberfest obsidian-md ocr
Last synced: 3 months ago
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Obsidian OCR allows you to search for text in your images and pdfs
- Host: GitHub
- URL: https://github.com/MohrJonas/obsidian-ocr
- Owner: MohrJonas
- License: gpl-3.0
- Created: 2022-07-01T07:55:06.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2024-02-20T20:11:13.000Z (over 2 years ago)
- Last Synced: 2024-04-28T04:38:10.783Z (about 2 years ago)
- Topics: hacktoberfest, obsidian-md, ocr
- Language: TypeScript
- Homepage:
- Size: 1.48 MB
- Stars: 265
- Watchers: 10
- Forks: 5
- Open Issues: 10
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE.md
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README
# **⚠️ Still in early development ⚠️**
## Obsidian OCR
Obsidian OCR allows you to search for text in your images and PDFs
### Installation
#### Dependencies
- `tesseract` for OCR
- `imagemagick` for pdf to png conversion
##### Windows
###### Manual installation
❗Make sure the executables are in your path. If you don't know how look
here: ❗
- Install [tesseract](https://github.com/UB-Mannheim/tesseract/wiki)
- Install [imagemagick](https://imagemagick.org/index.php)
- If you want to use another language that english, you have to install it manually. (It's really simple)
- Go to
- Download the file for your language (i.e. for German download ger.traineddata)
- Move to file to `C:\Program Files\Tesseract-OCR\tessdata`
###### Automatic installation
❗The automatic installation features is still in very early development. Expect bugs❗
ℹ️ Obsidian OCR uses [chocolatey](https://chocolatey.org/) for automatic installation ℹ
- Install & enable the plugin
- Under `settings`, press the `automatic install` button
##### MacOS
- Install tesseract: `brew install tesseract`
- Install tesseract-lang : `brew install tesseract-lang`
- Install imagemagick : `brew install imagemagick`
For the path: check where the binaries are located and add these to "/private/etc/paths"
(I also added them to ~/.zshrc, not sure if that is needed)
- `brew list tesseract` in my case: `/opt/homebrew/Cellar/tesseract/5.2.0/bin/`
- `brew list tesseract-lang` in my case: `/opt/homebrew/Cellar/tesseract/5.2.0/bin/`
- `brew list imagemagick` in my case: `/opt/homebrew/Cellar/imagemagick/7.1.0-43/bin/`
##### Ubuntu
###### Manual installation
- Run `sudo apt install -y tesseract-ocr imagemagick`
- Install any languages you need by installing the appropriate package (usually named `tesseract-ocr-`)
###### Automatic installation
❗The automatic installation features is still in very early development. Expect bugs❗
- Install & enable the plugin
- Under `settings`, press the `automatic install` button
##### Arch / Manjaro
###### Manual installation
- Run `sudo pacman -S tesseract imagemagick`
- Install any languages you need by installing the appropriate package (usually named `tesseract-data-`)
###### Automatic installation
❗The automatic installation features is still in very early development. Expect bugs❗
- Install & enable the plugin
- Under `settings`, press the `automatic install` button
#### Flatpak
If Obsidian is running via the Flatpak installation (such as provided by default in Pop!_OS) then this plugin
will not operate. Flatpak sandboxing will change the filepaths so even providing host access will still be problematic.
If you have a Flatpak installation you will need to reinstall via a different method to successfully use this plugin.
#### Plugin installation
- Simply install the plugin from the community plugins
### Usage
- Upon enabling the plugin, you will see a progress bar in the bottom right, indicating that your vault is currently
being processed.
- Upon completion, you can either use the `Search OCR` command or the `magnifying-glass icon` in the ribbon to open the
search menu.
- When adding a new PDF / PNG to your vault, the file is automatically being searched for text.
- Upon starting Obsidian, you will now see another progress bar, indicating that all transcripts are being cached.
### Settings
Obsidian OCR offers a variety of settings you can configure yourself.
| Name | Description | Default |
|:---------------------------:|:-------------------------------------------------------------------------------------------------------------------------------:|:-------:|
| Max OCR Processes | The maximum amount of ocr processes running at the same time. Increasing this speeds up indexing but also increases cpu usage | 1 |
| Max caching processes | The maximum amount of caching processes running at the same time. Increaing this speeds up caching but also increases cpu usage | 10 |
| OCR Image | Decides whether or not images (.png, .jpg, .jpeg) are OCRed | true |
| OCR PDF | Decides whether or not PDFs (.pdf) are OCRed | true |
| Image density | The density of generated PNGs, in dpi. Increasing this helps to OCR smaller text, but increases cpu usage | 300 |
| Image quality | The quality of generated PNGs. Increasing this helps to OCR smaller text, but increaes cpu usage | 98 |
| Additional imagemagick args | Additional commandline arguments passed to imagemagick when converting a PDF to PNG(s) | |
| Additional search paths | Additional paths that will be searched when looking for external dependencies. Useful when installing into custom directories | |
| OCR Provider | The OCR provider that will be used. See below for a description of providers | NoOp |
### OCR Providers
#### List of OCR providers
| Name | Description |
|-----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| NoOp | The NoOp (no operation) provider does, as the name implies, nothing and is only a dummy provider. To get real OCR capability, you have to switch to another provider |
| Tesseract | OCR provider using [tesseract](https://tesseract-ocr.github.io/) to OCR documents locally on your computer |
##### Tesseract
By default, tesseract offers two languages to choose from: `eng` and `osd`.
- Osd isn't a language, but rather stands for `Orientation and script detection` and is therefore not useful for our
use.
- Eng stands for english and should be chosen if your documents are written in english.
ℹ After switching your language, only newly indexed documents use the new language. You can reindex your already added
documents by using the `Delete all transcripts` command ℹ
###### Lang vs Script
Tesseract supports `langs` and `scripts` for text recognition.
- Langs support a single language
- Scripts support multiple languages with similar characters. Latin, for example, supports all latin-based languages (English, German, Italian, France, ...) except for Vietnamese
#### Custom OCR providers
To add a custom OCR provider, create a new class that extends `OCRProvider` and register it
using `OCRProviderManager.registerOCRProviders(new MyCustomProvider())`