tesseract.js/docs/tesseract_parameters.md

Tesseract.js Parameters

When initializing

In the 3rd argument of ecognize(), you can pass a params object to customize the result of OCR, below are supported parameters in tesseract.js so far.

Example:

import { createWorker, OEM, PSM } from 'tesseract.js';

const { TesseractWorker, OEM, PSM } = Tesseract;
const worker = new TesseractWorker();

worker
  .recognize(image, 'eng', {
    tessedit_ocr_engine_mode: OEM.LSTM_ONLY,
    tessedit_pageseg_mode: PSM.SINGLE_BLOCK,
  })
  .then(result => console.log(result.text));

name	type	default value	description
tessedit_ocr_engine_mode	enum	OEM.LSTM_ONLY	Check HERE for definition of each mode
tessedit_pageseg_mode	enum	PSM.SINGLE_BLOCK	Check HERE for definition of each mode
tessedit_char_whitelist	string	''	setting white list characters makes the result only contains these characters, useful the content in image is limited
tessjs_create_hocr	string	'1'	only 2 values, '0' or '1', when the value is '1', tesseract.js includes hocr in the result
tessjs_create_tsv	string	'1'	only 2 values, '0' or '1', when the value is '1', tesseract.js includes tsv in the result
tessjs_create_box	string	'0'	only 2 values, '0' or '1', when the value is '1', tesseract.js includes box in the result
tessjs_create_unlv	string	'0'	only 2 values, '0' or '1', when the value is '1', tesseract.js includes unlv in the result
tessjs_create_osd	string	'0'	only 2 values, '0' or '1', when the value is '1', tesseract.js includes osd in the result