Base image not assigned product list

baseimage.php

<?php
require_once ( "app/Mage.php" );
Mage::app();
umask(0);
//echo Mage::getBaseUrl();
$url = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB);
//exit;
$_productCollection = Mage::getModel('catalog/product')
    ->getCollection()
    ->addAttributeToSort('created_at', 'DESC')
    ->addAttributeToSelect('*')
    ->load();

foreach ($_productCollection as $_product) {
        $imageUrl = Mage::getModel('catalog/product_media_config')->getMediaUrl($_product->getImage());
        if($imageUrl == $url.'media/catalog/product/' || $imageUrl == $url.'media/catalog/product/no_selection'){
                echo Mage::getBaseUrl().'admin/catalog_product/edit/id/'.$_product->getId().'->'.Mage::getBaseUrl().'catalog/product/view/id/'.$_product->getId();
                echo '<br/>';
        }
}