question: private List < Pair < SceneView , SceneView > > imagesWithCommonFeatures ( double n , List < SceneView > imgList ) { List < Pair < SceneView , SceneView > > images = new ArrayList < > ( ) ; for ( int i = 0 ; i < imgList . size ( ) ; i ++ ) { SceneView imgI = imgList . get ( i ) ; for ( int j = 0 ; j < imgList . size ( ) ; j ++ ) { if ( j > i ) { SceneView imgJ = imgList . get ( j ) ; Collection < Feature > f = imgJ . getCommonFeatures ( imgI ) ; if ( f . size ( ) >= n ) { images . add ( new Pair < > ( imgI , imgJ ) ) ; } } } } return images ; }
target:  Returns list of pairs of images with common features