NAME

       lqr_carver_set_side_switch_frequency - set LqrCarver object side switch frequency

SYNOPSIS

       #include <lqr.h>

       void lqr_carver_set_side_switch_frequency(LqrCarver* carver, guint switch_frequency);

DESCRIPTION

       When the function lqr_carver_resize(3) is invoked, it computes a relevance value for each
       pixel in the image, then chooses the optimal seam to carve based on such relvance values.
       However, in the case two seams are equivalent (which may happen when large portions of the
       image have the same colour, for example), the algorithm always chooses the seams from one
       side.

       In order to overcome this effect, an option is given to automatically switch the favoured
       side during rescaling, at the cost of a slightly worse performance.

       The function lqr_carver_set_side_switch_frequency sets the side switch frequency to
       switch_frequency for the LqrCarver object pointed to by carver. This will have the effect
       that, for each rescale operation, the favoured side will be switched switch_frequency
       times (or as much times as the number of pixels to rescale).

       The default value for newly created LqrCarver objects is 0.

       As for the final result, a very small value (e.g.  1 to 4) will normally suffice to
       balance the left and right side of the image (or the top and the boddom sides for vertical
       rescalings), without noticeable computational costs. However, in order to obtain a
       smoother behaviour for the visibiliy map, i.e. for the intermediate steps, higher values
       may be required.

SEE ALSO

       lqr_carver_set_enl_step(3), lqr_carver_set_resize_order(3), lqr_carver_set_dump_vmaps(3),
       lqr_carver_set_progress(3), lqr_carver_set_preserve_input_image(3),
       lqr_carver_set_use_cache(3)

COPYRIGHT

       Copyright © 2007-2009 Carlo Baldassi