dart_lut 0.0.3

The implementation of image processing via 3D LUT (LookUp Tables). It's written on the pure Dart language so that it can be used with Flutter, CLI and web.

example/main.dart

import 'dart:io';

import 'package:dart_lut/src/lut.dart';
import 'package:image/image.dart';
import 'package:args/args.dart';
import 'package:path/path.dart' as path;

void main(List<String> args) {
  final parser = ArgParser()
    ..addOption('lut-file', abbr: 'l', allowMultiple: false)
    ..addOption('in-img', abbr: 'i', allowMultiple: true)
    ..addOption('out-dir',
        abbr: 'o', defaultsTo: './out', allowMultiple: false);

  _runStreamed(parser.parse(args));
}

void _run(final ArgResults argResult) {
  for (var img in argResult['in-img']) {
    final imageFile = File(img);

    final lutFile = File(argResult['lut-file']);

    final lut = LUT.fromString(lutFile.readAsStringSync());

    lut.isLoaded.listen((data) async {
      Image image = decodeImage(imageFile.readAsBytesSync());
      final sw = Stopwatch()..start();
      var interp = InterpolationType.trilinear;

      var v = lut.applySync(image.getBytes(), interp);

      print('lut apply in ${sw.elapsed}');
      sw.stop();
      var image2 = Image.fromBytes(image.width, image.height, v);
      var outputFile = new File(
          '${argResult['out-dir']}/${path.basename(imageFile.path)}_${path.basename(lutFile.path)}_$interp.jpg')
        ..writeAsBytesSync(encodeJpg(image2));
      print('output image write to: ${outputFile.path}');
    });
  }
}

void _runStreamed(final ArgResults argResult) async {
  for (var img in argResult['in-img']) {
    final imageFile = File(img);

    final lutFile = File(argResult['lut-file']);

    final lut = LUT.fromString(lutFile.readAsStringSync());

    var isLoaded = await lut.awaitLoading();
    if (isLoaded) {
      Image image = decodeImage(imageFile.readAsBytesSync());
      var interp = InterpolationType.trilinear;
      lut.applyAsStream(image.getBytes(), interp).listen((result) {
        print('#${result.toRadixString(16).padLeft(4, '0')}');
      });
    }
    ;
  }
}