Register an image control in the Wordpress Customizer

gistfile1.txt

/**
 * Create an image control in the Customizer with an ID of 'logo_url'.
 *
 * This is added to the 'title_tagline' section.
 */
$wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, 'logo_url',
    array(
        'settings' => 'logo_url',
        'section'  => 'title_tagline',
        'label'    => __( 'Logo', 'my_theme' )
    ) )
);