add to functions.php

/**
 * Filter the genesis_seo_site_title function to use an image for the logo instead of a background image
 * 
 * The genesis_seo_site_title function is located in genesis/lib/structure/header.php
 * @link http://blackhillswebworks.com/?p=4144
 *
 */

	add_filter( 'genesis_seo_title', 'bhww_filter_genesis_seo_site_title', 10, 2 );

	function bhww_filter_genesis_seo_site_title( $title, $inside ){
	 
		$child_inside = sprintf( '<a href="%s" title="%s"><img src="'. get_stylesheet_directory_uri() .'/images/logo.png" title="%s" alt="%s"/></a>', trailingslashit( home_url() ), esc_attr( get_bloginfo( 'name' ) ), esc_attr( get_bloginfo( 'name' ) ), esc_attr( get_bloginfo( 'name' ) ) );
	 
		$title = str_replace( $inside, $child_inside, $title );
	 
		return $title;
		
	}