I feel heuristic algorithms works for the same

if it is the actual palm print your after i would tempted to try a  Fully-Connected CRF. This paper shows how it can achieve fairly fine segmentation on an iris image:

Learning fully-connected CRFs for blood vessel segmentation in retinal images.

José Ignacio Orlando, Matthew Blaschko

 http://hal.inria.fr/docs/01/02/42/26/PDF/OrlandoMICCAI2014.pdf 

ps. Perhaps you could upload a few samples to help people answer your question.

Thanks for your suggestions.