ANDREAS_LATANOWSKY_CPD_1910877/lib/image_uploader.dart

import 'package:flutter/services.dart';
import 'dart:io';
import 'package:flutter_tesseract_ocr/flutter_tesseract_ocr.dart';
import 'package:path_provider/path_provider.dart';

class ImageUploader {
  ImageUploader();

  Future<Uint8List> buildImageFile(String img) async {
    String imageName = img;
    ByteData bytes = await rootBundle.load('assets/$imageName');
    return bytes.buffer.asUint8List();
  }

  Future<String> performOcr(
      Uint8List imageBytes, String imageName, String lang) async {
    Directory tempDir = await getTemporaryDirectory();
    String tempPath = tempDir.path;
    File tempImageFile = File('$tempPath/$imageName');
    await tempImageFile.writeAsBytes(imageBytes);

    String text = await FlutterTesseractOcr.extractText(tempImageFile.path,
        language: lang,
        args: {
          "psm": "4",
          "preserve_interword_spaces": "1",
        });

    return text;
  }

  Future<String> performAdvancedOCR(
      Uint8List imageBytes, String imageName, String lang) async {
    Directory tempDir = await getTemporaryDirectory();
    String tempPath = tempDir.path;
    File tempImageFile = File('$tempPath/$imageName');
    await tempImageFile.writeAsBytes(imageBytes);

    String text = await FlutterTesseractOcr.extractHocr(tempImageFile.path,
        language: lang,
        args: {
          "psm": "4",
          "preserve_interword_spaces": "1",
        });

    return text;
  }
}