function image_resize gets an address as input(image_address) and change its size in X-xoordinate respect to X_r and change its size in Y-xoordinate respect to Y_r , according to nearest neighbor method -function　 image_resize　gets an address as input(image_address) and change its size in X-xoordinate respect to　X_r　and　change its size in Y-xoordinate respect to　Y_r , according to nearest neighbor method