How Do We Detect The Orientation Of Image Captured Using Camerax If Application's Default Orientation Is Set To Portrait Mode

Basically, My camera app is set to Portrait Mode. However, user can take photos in Potrait or landscape by rotating the phone accordingly (The app doesnt rotate). So my question is

Solution 1:

I had this problem also. What solved it is by using the device sensor data to get the correct orientation, then set it in my imageCapture object. See snippet below.

        orientationEventListener = object : OrientationEventListener(context) {
            overridefunonOrientationChanged(orientation: Int) {
                // Monitors orientation values to determine the target rotation valueval rotation = if (orientation >= 45 && orientation < 135) {
                    Surface.ROTATION_270
                } elseif (orientation >= 135 && orientation < 225) {
                    Surface.ROTATION_180
                } elseif (orientation >= 225 && orientation < 315) {
                    Surface.ROTATION_90
                } else {
                    Surface.ROTATION_0
                }

                imageCapture?.setTargetRotation(rotation)
            }
        }

This is also the recommended approach from a similar issue in the Google Issue Tracker: https://issuetracker.google.com/issues/144944155

Solution 2:

Try out this same in our case ExifInterface did't work.

privateintgetImgimageOrientation(){
final String[] imageColumns = { MediaStore.Images.Media._ID, MediaStore.Images.ImageColumns.ORIENTATION };
finalStringimageOrderBy= MediaStore.Images.Media._ID+" DESC";
Cursorcursor= getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
        imageColumns, null, null, imageOrderBy);

if(cursor.moveToFirst()){
    intorientation= cursor.getInt(cursor.getColumnIndex(MediaStore.Images.ImageColumns.ORIENTATION));
    cursor.close();
    return orientation;
} else {
    return0;
}
}

Solution 3:

Please follow the Official documentation of camerax:

By default, the camera rotation is set to match the default display's rotation during the creation of the use case. In this default case, CameraX produces outputs to allow the app to easily match what you would expect to see in the preview. You can change the rotation to a custom value to support multi-display devices by passing in the current display orientation when configuring use case objects or dynamically after they have been created.

You can use the default display rotation and/or the camerax metadata output combinations from Preview.PreviewOutput() to create transforms for GLSurfaceView display.

valpreviewConfig= PreviewConfig.Builder()
        .setTargetRotation(windowManager.defaultDisplay.rotation)
        .build()

Based on the set rotation, each use case will either rotate the image data directly or provide rotation metadata to the consumers of the non-rotated image data.

• Preview: Metadata output is provided to create the right transforms for a GLSurfaceView display using Preview.PreviewOutput.getRotationDegrees().

• ImageAnalysis: Metadata output is provided so that image buffer coordinates are known relative to display coordinates. The analyze() method provides a rotationDegrees parameter representing the rotation that needs to be applied to the image analysis data to match the viewfinder.

• ImageCapture: The image Exif metadata will be altered to note the rotation setting.