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25 lines
1.5 KiB
25 lines
1.5 KiB
6 years ago
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## Local Installation
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In browser environment, `tesseract.js` simply provides the API layer. Internally, it opens a WebWorker to handle requests. That worker itself loads code from the Emscripten-built `tesseract.js-core` which itself is hosted on a CDN. Then it dynamically loads language files hosted on another CDN.
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Because of this we recommend loading `tesseract.js` from a CDN. But if you really need to have all your files local, you can pass extra arguments to `TessearctWorker` to specify custom paths for workers, languages, and core.
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In Node.js environment, the only path you may want to customize is languages/langPath.
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```javascript
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const worker = Tesseract.TesseractWorker({
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workerPath: 'https://cdn.jsdelivr.net/gh/naptha/tesseract.js@v2.0.0/dist/worker.min.js',
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langPath: 'https://tessdata.projectnaptha.com/4.0.0',
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corePath: 'https://cdn.jsdelivr.net/gh/naptha/tesseract.js-core@v2.0.0-beta.5/tesseract-core.js',
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});
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```
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### workerPath
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A string specifying the location of the [worker.js](./dist/worker.min.js) file.
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### langPath
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A string specifying the location of the tesseract language files, with default value 'https://tessdata.projectnaptha.com/4.0.0'. Language file URLs are calculated according to the formula `langPath + langCode + '.traineddata.gz'`.
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### corePath
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A string specifying the location of the [tesseract.js-core library](https://github.com/naptha/tesseract.js-core), with default value 'https://cdn.jsdelivr.net/gh/naptha/tesseract.js-core@v2.0.0-beta.5/tesseract-core.js'.
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