Upload dan Resize Image CI

public function doinsertdata(){
            //$id_kategori= $_POST['id_kategori'];
            $judul = $_POST['judul'];
            $cover = $_FILES['cover']['name'];
            $tipebaru = explode(".",$cover);
            $tipebaru2 = $tipebaru['1'];
            $filebaru3 = str_replace(' ','_',$judul);
            $file_input = 'cover';
            $data_insert = array(
                //'kode_kategori' => $id_kategori,
                'judul_kategori' => $judul,
                'cover' => $filebaru3.'.'.$tipebaru2,
                );
            $rby = $this->mymodel->Insertdata('kategori',$data_insert);
            $image_source2 = base_url()."uploads/";

            //script upload start
            $config['remove_spaces'] = TRUE;
            $config['file_name'] = $filebaru3.'.'.$tipebaru2 ;
            $config['upload_path'] = './uploads/';
            $config['allowed_types'] = 'gif|jpg|png';
            $config['max_size'] = '100000';
            $config['max_width'] = '102400';
            $config['max_height'] = '76800';
            $this->load->library('upload', $config);
            $this->upload->do_upload($file_input);
            $this->upload->data();
            //script upload end

            //script resize start
            $config['image_library'] = 'gd2';
            $config['source_image'] = ubah isinya sesuai dengan path dimana foto yg akan anda resize disimpan;
            $config['create_thumb'] = TRUE;
            $config['maintain_ratio'] = TRUE;
            $config['width'] = 200;
            $config['height'] = 200;
            $this->load->library('image_lib',$config);
            $this->image_lib->resize();
            //script resize end
}