Stop WordPress from showing images on non post pages

Place following code to your theme functions.php:

add_filter('the_content','wpi_image_content_filter',11);

function wpi_image_content_filter($content){

    if (is_home() || is_front_page()){
      $content = preg_replace("/<img[^>]+\>/i", "", $content);
    }

    return $content;
}

From http://wordpress.org/support/topic/how-to-hide-images-from-front-page