Angular: Empty Fiddle
http://angularjs.org/
HTML
<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
Your Img is {{imgSrc}}!
</div>
JavaScript
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.imgSrc = '';
var obj = {"rss": {
"channel": {
"title": "url..",
"link": "url..",
"description": "",
"language": "en",
"item": [{
"title": "title..",
"link": "http://www.*",
"description": "<img typeof=\"foaf:Image\" src=\"http://www.apetitonline.cz/sites/default/files/styles/630x420/public/recept/03.jpg?itok=2Kgsj3sM&c=2f56768ef5b85d1b98fa815e400ac524\" alt=\"\" /> \n<div class=\"field field-name-field-text-summary field-type-text-with-summary field-label-hidden\">Test Text</div>"
}]
}
}}
var $div = angular.element('<div style="display="hidden"/>').html(obj.rss.channel.item[0].description);
var $img = $div.find('img')
$scope.imgSrc = $img.attr('src')
}