OCR operation now relies on local files

package-lock.json

@@ -3497,6 +3497,170 @@
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+        "schema-utils": {
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+          "dev": true,
+          "requires": {
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+            "ajv-errors": "^1.0.0",
+            "ajv-keywords": "^3.1.0"
+          }
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+        "y18n": {
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+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+          "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+          "dev": true
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     "core-js": {
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@@ -4358,6 +4522,32 @@
         "randombytes": "^2.0.0"
       }
     },
+    "dir-glob": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-2.2.2.tgz",
+      "integrity": "sha512-f9LBi5QWzIW3I6e//uxZoLBlUt9kcp66qo0sSCxL6YZKc75R1c4MFCoe/LaZiBGmgujvQdxc5Bn3QhfyvK5Hsw==",
+      "dev": true,
+      "requires": {
+        "path-type": "^3.0.0"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/path-type/-/path-type-3.0.0.tgz",
+          "integrity": "sha512-T2ZUsdZFHgA3u4e5PfPbjd7HDDpxPnQb5jN0SrDsjNSuVXHJqtwTnWqG0B1jZrgmJ/7lj1EmVIByWt1gxGkWvg==",
+          "dev": true,
+          "requires": {
+            "pify": "^3.0.0"
+          }
+        },
+        "pify": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
+          "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
+          "dev": true
+        }
+      }
+    },
     "dns-equal": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/dns-equal/-/dns-equal-1.0.0.tgz",
@@ -11682,6 +11872,12 @@
         "xmlbuilder": "^13.0.0"
       }
     },
+    "slash": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-1.0.0.tgz",
+      "integrity": "sha1-xB8vbDn8FtHNF61LXYlhFK5HDVU=",
+      "dev": true
+    },
     "slice-ansi": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-2.1.0.tgz",

package.json

@@ -45,6 +45,7 @@
     "babel-plugin-dynamic-import-node": "^2.3.0",
     "chromedriver": "^76.0.1",
     "colors": "^1.3.3",
+    "copy-webpack-plugin": "^5.0.4",
     "css-loader": "^3.2.0",
     "eslint": "^6.2.2",
     "exports-loader": "^0.7.0",

src/core/operations/OpticalCharacterRecognition.mjs

@@ -14,6 +14,8 @@ import { isWorkerEnvironment } from "../Utils.mjs";
 import Tesseract from "tesseract.js";
 const { TesseractWorker } = Tesseract;
 
+import process from "process";
+
 /**
  * Optical Character Recognition operation
  */
@@ -26,7 +28,7 @@ class OpticalCharacterRecognition extends Operation {
         super();
 
         this.name = "Optical Character Recognition";
-        this.module = "Image";
+        this.module = "OCR";
         this.description = "Optical character recognition or optical character reader (OCR) is the mechanical or electronic conversion of images of typed, handwritten or printed text into machine-encoded text.<br><br>Supported image formats: png, jpg, bmp, pbm.";
         this.infoURL = "https://wikipedia.org/wiki/Optical_character_recognition";
         this.inputType = "ArrayBuffer";
@@ -48,14 +50,22 @@ class OpticalCharacterRecognition extends Operation {
     async run(input, args) {
         const [showConfidence] = args;
 
+        if (!isWorkerEnvironment()) throw OperationError("This operation only works in a browser");
+
         const type = isImage(input);
         if (!type) {
             throw new OperationError("Invalid File Type");
         }
 
+        const assetDir = isWorkerEnvironment() ? `${self.docURL}/assets/` : `${process.cwd()}/src/core/vendor/`;
+
         try {
             const image = `data:${type};base64,${toBase64(input)}`;
-            const worker = new TesseractWorker();
+            const worker = new TesseractWorker({
+                workerPath: `${assetDir}/tesseract/worker.min.js`,
+                langPath: `${assetDir}/tesseract/lang-data/`,
+                corePath: `${assetDir}/tesseract/tesseract-core.wasm.js`,
+            });
             const result = await worker.recognize(image)
                 .progress(progress => {
                     if (isWorkerEnvironment()) {

tests/operations/tests/Image.mjs

@@ -248,7 +248,7 @@ TestRegister.addTests([
             }
         ]
     },
-    /*{ Commented out as it takes a while to run and drops a file to disk (eng.traineddata)
+    /*{ This operation only works in a browser
         name: "Optical Character Recognition",
         input: "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",
         expectedOutput: "Tesseract.js\n",

webpack.config.js

@@ -1,5 +1,6 @@
 const webpack = require("webpack");
 const MiniCssExtractPlugin = require("mini-css-extract-plugin");
+const CopyWebpackPlugin = require("copy-webpack-plugin");
 const path = require("path");
 
 /**
@@ -50,6 +51,13 @@ module.exports = {
         new MiniCssExtractPlugin({
             filename: "assets/[name].css"
         }),
+        new CopyWebpackPlugin([
+            {
+                context: "src/core/vendor/",
+                from: "tesseract/**/*",
+                to: "assets/"
+            }
+        ])
     ],
     resolve: {
         alias: {