How to upload image from front end and save in media library?

Now I have an answer for my own question.I solved this issue by using this code.I add this code just for sharing and helping other as it works for me.

<input type="file" name="my_file_upload" id="my_file_upload_id" class="bg_checkbox"  >

function register_team_show_case_setting() {
//register our settings
    register_setting('my_team_show_case_setting', 'my_file_upload');
}
add_action('admin_init', 'register_team_show_case_setting');

Code to upload and save image:

require_once( ABSPATH . 'wp-admin/includes/image.php' );
require_once( ABSPATH . 'wp-admin/includes/file.php' );
require_once( ABSPATH . 'wp-admin/includes/media.php' );
$attach_id = media_handle_upload('my_file_upload', $post_id);
if (is_numeric($attach_id)) {
    update_option('option_image', $attach_id);
    update_post_meta($post_id, '_my_file_upload', $attach_id);
}

Display image code

echo wp_get_attachment_url(get_option('option_image'));