camera_intrinsics 0.0.1

A Flutter plugin to retrieve camera intrinsics (focal length, principal point, image dimensions, distortion coefficients) using ARCore. Android only.

camera_intrinsics

A Flutter plugin to retrieve camera intrinsics (focal length, principal point, image dimensions, distortion coefficients) using ARCore.

Platform Support

Android	iOS
✅	❌

Requirements

• Android minSdkVersion: 24 or higher
• ARCore: Device must support ARCore (Google Play Services for AR)
• Camera Permission: Required at runtime

Setup

Android

Add the following to your app's AndroidManifest.xml inside the <application> tag:

<meta-data
    android:name="com.google.ar.core"
    android:value="required" />

Usage

import 'package:camera_intrinsics/camera_intrinsics.dart';

// Get camera intrinsics
try {
  final response = await CameraIntrinsics.getIntrinsics();

  final intrinsics = response.intrinsics;
  print('Focal Length: ${intrinsics['focalLength']}');
  print('Principal Point: ${intrinsics['principalPoint']}');
  print('Image Dimensions: ${intrinsics['imageDimensions']}');
  print('Distortion: ${intrinsics['distortion']}');
  print('Was cached: ${response.isCached}');
} on PlatformException catch (e) {
  print('Error: ${e.message}');
}

// Clear cache if you need fresh data
CameraIntrinsics.clearCache();

Response Data

Field	Type	Description
focalLength	List<double>	Focal length in pixels [fx, fy]
principalPoint	List<double>	Principal point [cx, cy]
imageDimensions	List<int>	Image size [width, height]
distortion	List<double>	Distortion coefficients

Error Codes

Code	Description
CAMERA_PERMISSION_NOT_GRANTED	Camera permission was denied
NOT_ATTACHED	Plugin not attached to activity
INTRINSICS_UNAVAILABLE	Could not get intrinsics (tracking failed)
ARCORE_ERROR	ARCore session error