Image OCR Helper

OCR text from images using Tesseract.js

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Image OCR Helper
// @namespace    http://tampermonkey.net/
// @version      1.0.1
// @description  OCR text from images using Tesseract.js
// @match        *://*/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function () {
    'use strict';

    function loadScript(src) {
        return new Promise(resolve => {
            const s = document.createElement('script');
            s.src = src;
            s.onload = resolve;
            document.head.appendChild(s);
        });
    }

    async function init() {
        if (!window.Tesseract) {
            await loadScript('https://cdn.jsdelivr.net/npm/tesseract.js@5/dist/tesseract.min.js');
        }

        document.addEventListener('click', async e => {
            if (!(e.target instanceof HTMLImageElement)) return;

            const img = e.target;
            console.log('OCR started...');

            const result = await Tesseract.recognize(
                img.src,
                'eng',
                { logger: m => console.log(m) }
            );

            console.log('OCR RESULT:', result.data.text);
            alert('OCR result:\n\n' + result.data.text);
        }, true);
    }

    init();
})();