angularjs - Injection error while injecting scope in custom filter definition -

i trying inject $scope variable in angularjs custom filter definition.

the javascript code looks this:

angular.module('myapp',[])  .filter("myfilter", ['$scope', myfilterfunction])  function myfilterfunction($scope){  return function(client){    return client.tolowercase();  } } 

but way not working due injection error. there better way achieve trying here.