save image in upload folder

Hi guys
i want to create a field in user profile to upload image for use in author page .
and so i write the following codes but image url insert in database but photo can not be saved in upload folder
please help me!

add_action( 'show_user_profile', 'my_show_extra_profile_fields' );
add_action( 'edit_user_profile', 'my_show_extra_profile_fields' );

function my_show_extra_profile_fields( $user ) { ?>

<h3>Extra profile information</h3>

<table class="form-table">

<tr>
<th><label for="Linkedin">Header Photo</label></th>

<td>
<input type="file" name="Header" id="Header" value="<?php echo esc_attr( get_the_author_meta( 'Header', $user->ID ) ); ?>" class="regular-text" />
<span class="description">عکس هدر صفحه پروفایل خود را آپلود کنید</span>
</td>
</tr>
</table>
<?php }
add_action( 'personal_options_update', 'my_save_extra_profile_fields' );
add_action( 'edit_user_profile_update', 'my_save_extra_profile_fields' );

function my_save_extra_profile_fields( $user_id ) {
$uploadUrl= wp_get_upload_dir();
if ( !current_user_can( 'edit_user', $user_id ) )
return false;

/* Copy and paste this line for additional fields. Make sure to change 'twitter' to the field ID. */
update_usermeta( $user_id, 'Header', $uploadUrl['url']."/".$_POST['Header'] );
}