Callback for nodejs

[haplo31]

Hi,
I try to use your script in NodeJs but I can't integrate a callback with it.

When I make OCRAD(canvas, {numeric: true}, function(){console.log("test")})
I have an error :
/home/john/ocrad.js:1
aughtException",(function(ex){if(!(ex instanceof ExitStatus)){throw ex}}))}els
^
ReferenceError: window is not defined
at createWebWorkerFromString (/home/john/ocrad.js:43:34894)

Is it possible to call a callback after OCRAD's work is done with NodeJs ?

Thanks for your time