How to fix wrong rotation of photo from camera in flutter?

if you want to rotate image, you can use https://pub.dev/packages/image to manipulate images:

import 'package:image/image.dart';

If you use package "camera", you can't rotate image (remove mirror effect) using bakeOrientation because don't have exif data.

this works for me using "image_picker" or "camera".

File originalFile             = File.fromUri(Uri(path: file.path));
List<int> imageBytes           = await originalFile.readAsBytes();
final Image originalImage      = decodeImage(imageBytes)!;
final Image orientedImage      = flipHorizontal(originalImage);
List<int> imageBytesOrientated = encodeJpg(orientedImage);

For Write in same path:

await File(path).writeAsBytes(imageBytesOrientated);

You can use package https://pub.dev/packages/flutter_exif_rotation
Support iOS and Android
In some devices the exif data shows picture in landscape mode when they're actually in portrait.
This plugin fixes the orientation for pictures taken with those devices.

For Android
Add this in your AndroidManifest.xml

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

code snippet

image = await FlutterExifRotation.rotateImage(path: image.path);

//Note : iOS not implemented
image = await FlutterExifRotation.rotateAndSaveImage(path: image.path);

This is my solution that works cross-platform and doesn't use plugins.

import 'dart:io';
import 'package:exif/exif.dart';
import 'package:image/image.dart' as img;

Future<File> fixExifRotation(String imagePath) async {
    final originalFile = File(imagePath);
    List<int> imageBytes = await originalFile.readAsBytes();

    final originalImage = img.decodeImage(imageBytes);

    final height = originalImage.height;
    final width = originalImage.width;

    // Let's check for the image size
    // This will be true also for upside-down photos but it's ok for me
    if (height >= width) {
      // I'm interested in portrait photos so
      // I'll just return here
      return originalFile;
    }

    // We'll use the exif package to read exif data
    // This is map of several exif properties
    // Let's check 'Image Orientation'
    final exifData = await readExifFromBytes(imageBytes);

    img.Image fixedImage;

    if (height < width) {
      logger.logInfo('Rotating image necessary');
      // rotate
      if (exifData['Image Orientation'].printable.contains('Horizontal')) {
        fixedImage = img.copyRotate(originalImage, 90);
      } else if (exifData['Image Orientation'].printable.contains('180')) {
        fixedImage = img.copyRotate(originalImage, -90);
      } else if (exifData['Image Orientation'].printable.contains('CCW')) {
        fixedImage = img.copyRotate(originalImage, 180);
      } else {
        fixedImage = img.copyRotate(originalImage, 0);
      }
    }

    // Here you can select whether you'd like to save it as png
    // or jpg with some compression
    // I choose jpg with 100% quality
    final fixedFile =
        await originalFile.writeAsBytes(img.encodeJpg(fixedImage));

    return fixedFile;
  }

Source

This worked for me:

import 'package:image/image.dart' as img;

...

final img.Image capturedImage = img.decodeImage(await File(path).readAsBytes());
final img.Image orientedImage = img.bakeOrientation(capturedImage);
await File(path).writeAsBytes(img.encodeJpg(orientedImage));