typedef struct{
    float z_max, z_min;   /* max and min depth */
    float f_length;       /* Focal length */
    float b_dist;         /* Baseline distance between cameras */
    float delta;
    int min_run_w;
    int max_step_w; 
    int max_steps; 
    float alpha;
    float beta;
    float max_disp;
    int max_matches;
 } Parms;

extern Parms *readparms(char *name);