Img Datatable with ajax in laravel

Arivul

Hi!, im new using this library and i need to display and img from my public folder.
I read the column render doc but i dont really understand.
Could someone help me this is my ajax code:

$(document).ready(function(){
                listar();});
               var listar = function (){
                var table = $('#productos').DataTable({
                        "processing": true,
                        "serverSide": true,
                        "ajax": "ajaxProducto",
                        "columns":[
                                {data:'id'},
                                {data:'nombre'},
                                {data:'stock'},
                                {data:'imagen'},
                        ],
                        "language": idioma_esp});}

the data:imagen is where i store the name of the img.
Hope someone can help me.
Thanks.