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36 lines
1.5 KiB
36 lines
1.5 KiB
FAQ
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===
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## How does tesseract.js download and keep \*.traineddata?
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When you execute recognize() function (ex: `recognize(image, 'eng')`), the language model to download is determined by the 2nd argument of recognize(). (`eng` in the example)
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Tesseract.js will first check if \*.traineddata already exists. (browser: [IndexedDB](https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API), Node.js: fs, in the folder you execute the command) If the \*.traineddata doesn't exist, it will fetch \*.traineddata.gz from [tessdata](https://github.com/naptha/tessdata), ungzip and store in IndexedDB or fs, you can delete it manually and it will download again for you.
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## How can I train my own \*.traineddata?
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For tesseract.js v2, check [TrainingTesseract 4.00](https://github.com/tesseract-ocr/tesseract/wiki/TrainingTesseract-4.00)
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For tesseract.js v1, check [Training Tesseract 3.03–3.05](https://github.com/tesseract-ocr/tesseract/wiki/Training-Tesseract-3.03%E2%80%933.05)
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## How can I get HOCR, TSV, Box, UNLV, OSD?
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Starting from 2.0.0-alpha.10, you can get all these information in the final result.
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```javascript
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import Tesseract from 'tesseract.js';
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const { TesseractWorker } = Tesseract;
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const worker = new TesseractWorker();
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worker
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.recognize('https://tesseract.projectnaptha.com/img/eng_bw.png')
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.then((result) => {
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console.log(result.text);
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console.log(result.hocr);
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console.log(result.tsv);
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console.log(result.box);
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console.log(result.unlv);
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console.log(result.osd);
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});
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```
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