With more research i found a solution :
factory('Facedetect', function( $resource ) {
return $resource('skyBiometry/facedetect', {}, {
query: {
method : 'GET',
params : {imageUrl: "http://cdn1-public.ladmedia.fr/var/public/storage/images/dossiers/presidentielles-2012/les-news-sur-les-presidentielles-2012/exclu-public-cauet-pour-ces-presidentielles-personne-ne-me-fait-rever-209063/2064021-1-fre-FR/Exclu-Public-Cauet-Pour-ces-presidentielles-personne-ne-me-fait-rever-!_portrait_w674.jpg"},
isArray: false
}
})
});
function IndexCtrl( $scope, $routeParams, Facedetect ) {
$scope.imageurl = 'http://flepi.net/images/personne-tendue.jpg';
$scope.text = $scope.text = Facedetect.get({imageUrl: $scope.imageurl});
}
I don't know if it's the best way but it works.