lqr_progress_new(3) [debian man page]

LQR_PROGRESS_NEW(3)					     LqR library API reference					       LQR_PROGRESS_NEW(3)

NAME

       lqr_progress_new - the LqrProgress object constructor

SYNOPSIS

       #include <lqr.h>

       LqrProgress* lqr_progress_new(void);

DESCRIPTION

       The function lqr_progress_new is the constructor for LqrProgress objects. It can be used to setup a progress report indicator for rescale
       operations performed through lqr_carver_resize(3).

       Newly created LqrProgress objects are inactive, and need to be set up using the functions lqr_progress_set_init(3),
       lqr_progress_set_update(3) and lqr_progress_set_end(3).

       LqrProgress objects are associated to LqrCarver objects using the function lqr_carver_set_progress(3)

RETURN VALUE

       The function returns the newly created LqrProgress if successful, or NULL in case of insufficient memory.

SEE ALSO

       lqr_progress_set_init(3), lqr_progress_set_update(3), lqr_progress_set_end(3), lqr_progress_set_init_width_message(3),
       lqr_progress_set_init_height_message(3), lqr_progress_set_end_width_message(3), lqr_progress_set_end_height_message(3),
       lqr_progress_set_update_step(3), lqr_carver_set_progress(3)

COPYRIGHT

       Copyright (C) 2007-2009 Carlo Baldassi

LqR library 0.4.1 API (3:1:3)					    10 Maj 2009 					       LQR_PROGRESS_NEW(3)

LQR_CARVER_SET_SIDE_SWITCH_(3)				     LqR library API reference				    LQR_CARVER_SET_SIDE_SWITCH_(3)

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 (C) 2007-2009 Carlo Baldassi

LqR library 0.4.1 API (3:1:3)					    10 Maj 2009 				    LQR_CARVER_SET_SIDE_SWITCH_(3)