The type of the mixture covariation matrices

Initial mixture covariation matrices S_k; are used (if not NULL) only when start_step=CvEM::START_E_STEP.

Initial mixture means a_k; are used (and must be not NULL) only when start_step=CvEM::START_E_STEP.

The number of mixtures

Initial probabilities p_i,k; are used (and must be not NULL) only when start_step=CvEM::START_M_STEP

The initial step the algorithm starts from

Termination criteria of the procedure. EM algorithm stops either after a certain number of iterations (term_crit.num_iter), or when the parameters change too little (no more than term_crit.epsilon) from iteration to iteration

Initial mixture weights pi_k; are used (if not NULL) only when start_step=CvEM::START_E_STEP