Phone camera returns photo with black stripes

I am using Phonegap 3.4. When I photograph an iPhone in landscape, I return it with black stripes on the top and bottom.

Here are the camera configuration options:

var cameraOptions = {
      correctOrientation: true,
      quality: 90,
      destinationType: navigator.camera.DestinationType.FILE_URI,
      sourceType: navigator.camera.PictureSourceType.CAMERA,
      allowEdit: false,
      encodingType: navigator.camera.EncodingType.JPEG,
      targetWidth: 2312,
      targetHeight: 1736,
      saveToPhotoAlbum: false,
      popoverOptions: false,
      cameraDirection: navigator.camera.Direction.BACK
    };

      

        
        
        
      

    

What to do to get rid of black bars?