function prepareFilter(/* tweenProp, */_, value) {
    var filterObject = {};
    var fnp;

    // property: range | default
    // opacity: [0-100%] | 100
    // blur: [0-Nem] | 0
    // saturate: [0-N%] | 100
    // invert: [0-100%] | 0
    // grayscale: [0-100%] | 0
    // brightness: [0-N%] | 100
    // contrast: [0-N%] | 100
    // sepia: [0-N%] | 0
    // 'hueRotate': [0-Ndeg] | 0
    // 'dropShadow': [0,0,0,(r:0,g:0,b:0)] | 0
    // url: '' | ''

    Object.keys(value).forEach(function (fn) {
      fnp = replaceDashNamespace(fn);
      if (/hue/.test(fn)) {
        filterObject[fnp] = parseFloat(value[fn]);
      } else if (/drop/.test(fn)) {
        filterObject[fnp] = parseDropShadow(value[fn]);
      } else if (fn === 'url') {
        filterObject[fn] = value[fn];
      // } else if ( /blur|opacity|grayscale|sepia/.test(fn) ) {
      } else {
        filterObject[fn] = parseFloat(value[fn]);
      }
    });

    return filterObject;
  }
Returns the property tween object.
@param {string} _ the property name
@param {string} value the property name
@returns {KUTE.filterList} the property tween object