NAME

       lqr_carver_bias_set_energy_function_builtin - set a builtin energy function for a
       LqrCarver object

SYNOPSIS

       #include <lqr.h>

       LqrRetVal lqr_carver_set_energy_function_builtin(LqrCarver* carver,
                                                        LqrEnergyFuncBuiltinType ef_ind);

DESCRIPTION

       The function lqr_carver_set_energy_function_builtin allows to pick a builtin energy
       function for the LqrCarver object pointed to by carver.

       The possible values for ef_ind are:

       LQR_EF_GRAD_XABS
           absolute value of the brightness gradient in the direction of the rescaling (this is
           the default)

       LQR_EF_GRAD_SUMABS
           sum of absolute values of the brightness gradients in both directions

       LQR_EF_GRAD_NORM
           norm of the brightness gradient

       LQR_EF_LUMA_GRAD_XABS
           absolute value of the luma gradient in the direction of the rescaling

       LQR_EF_LUMA_GRAD_SUMABS
           sum of absolute values of the luma gradients in both directions

       LQR_EF_LUMA_GRAD_NORM
           norm of the luma gradient

       LQR_EF_NULL
           null

       All of the above gradient functions have a radius of 1 pixel.

RETURN VALUE

       The return value follows the Liquid Rescale library signalling system.

SEE ALSO

       lqr_carver_set_energy_function(3), lqr_carver_get_energy(3)

COPYRIGHT

       Copyright © 2007-2009 Carlo Baldassi