Tips for integrating Tesseract with Angular 2 and above

Question

Tips for integrating Tesseract with Angular 2 and above

I'm currently exploring the use of Tesseract within one of my components for OCR processing on a file.

.ts:

import * as Tesseract from 'tesseract.js';

fileToUpload: File = null;
handleFileInput(files: FileList) {
    this.fileToUpload = files.item(0);
  }
imageOcr() {
    Tesseract.recognize(this.fileToUpload)
      .progress(message => console.log(message))
      .catch(err => console.error(err))
      .then(res => console.log(res))
      .finally(resultOrError => console.log(resultOrError));
 }

.html

<div>
  <h6>Local Image OCR</h6>
  <input type="file" accept=".jpg,.png,.jpeg,.webp"  (change)="handleFileInput($event.target.files)">
  <button (click)="imageOcr()">click</button>
</div>

While following this guide, I encountered the following error message:

"blob:http://localhost:4200/65999042-8757-4264-b92d-ed5e0a0e4c27:1 Uncaught DOMException: Failed to execute 'importScripts' on 'WorkerGlobalScope': The script at 'http://localhost:4200/dist/worker.dev.js?nocache=qf0eq67rus' failed to load.
    at blob:http://localhost:4200/65999042-8757-4264-b92d-ed5e0a0e4c27:1:1"

What steps should I take to resolve this issue and successfully implement Tesseract functionality?

angular typescript import ocr tesseract

Answer 1

Answer №1

In the event that someone faces a similar issue, I have discovered a solution: the tesseract typescript wrapper.

For more information, please visit this link to GitHub

Answer 2

In the event that someone faces a similar issue, I have discovered a solution: the tesseract typescript wrapper.

For more information, please visit this link to GitHub

Answer 3

Answer №2

Avoid relying on an additional TypeScript wrapper dependency, as you can achieve the desired outcome without it.

Begin by installing the necessary JavaScript module:

npm install tesseract.js --save
Next, add the @types declarations:
```
npm install @types/tesseract.js --save
```
To import, use the following code snippet:
```
import * as Tesseract from 'tesseract.js'
```

Utilize the module in this manner:

let filename = 'assets/img/abcdefg.jpg'
 Tesseract.recognize(filename)
      .progress(function (p) { console.log('progress', p) })
      .catch(err => console.error(err))
      .then(function (result) {
        console.log("result ======<<<<>>>>>");
        console.log(result.text)
  })

Answer 4

Avoid relying on an additional TypeScript wrapper dependency, as you can achieve the desired outcome without it.

Begin by installing the necessary JavaScript module:

npm install tesseract.js --save
Next, add the @types declarations:
```
npm install @types/tesseract.js --save
```
To import, use the following code snippet:
```
import * as Tesseract from 'tesseract.js'
```

Utilize the module in this manner:

let filename = 'assets/img/abcdefg.jpg'
 Tesseract.recognize(filename)
      .progress(function (p) { console.log('progress', p) })
      .catch(err => console.error(err))
      .then(function (result) {
        console.log("result ======<<<<>>>>>");
        console.log(result.text)
  })

Tips for integrating Tesseract with Angular 2 and above

Answer №1

Answer №2

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