diff options
Diffstat (limited to 'gamut/nearsmth.h')
| -rw-r--r-- | gamut/nearsmth.h | 48 |
1 files changed, 34 insertions, 14 deletions
diff --git a/gamut/nearsmth.h b/gamut/nearsmth.h index f826357..82afab3 100644 --- a/gamut/nearsmth.h +++ b/gamut/nearsmth.h @@ -126,10 +126,14 @@ typedef struct { struct { double rdl; /* Direction smoothing radius L* dir. (delta E radius at src point)*/ double rdh; /* Direction smoothing radius H* (delta E radius at src point)*/ + + double dsm; /* Degree of smoothing (non-linear response) */ } r; - /* depth weighting */ - /* Weighing to give to minimizing depth ratio by mapping to/from adequate dest/src depth */ + /* Depth room weighting. */ + /* Weighing to give to minimizing depth ratio by mapping to/from adequate dest/src depth. */ + /* The idea is to compromize luminance and/or hue to allow room for */ + /* preserving saturation distinction under heavy compression. */ struct { double co; /* Overall compression weighting */ double xo; /* Overall expansion weighting */ @@ -166,6 +170,7 @@ typedef struct { struct _nearsmth { /* Public: */ + int uflag; /* Use flag, 0 = normal, 1 = grid surface point */ int gflag; /* Gamut direction flag. 0 = not determinable, 1 = comp., 2 = exp. */ int vflag; /* Vector direction flag. 0 = not determinable, 1 = comp., 2 = exp. */ /* sv2, dv2, sd3 etc. are valid if vflag != 0 */ @@ -178,12 +183,13 @@ struct _nearsmth { double dv[3]; /* Output destination value */ double dr; /* Output destination value radius from center */ double div[3]; /* gam[cx]pf moderated dv[] value */ + double w1; /* guide point weight */ /* Gamut sub-surface mapping guide point (knee shape controlled by gamcknf & gamxknf) */ double sv2[3]; /* Sub-surface source value */ double dv2[3]; /* Sub-surface knee'd adjusted destination value */ double div2[3]; /* gam[cx]pf moderated dv2[] value */ - double w2; /* Sub-surface weight (fixed in nearsmth) */ + double w2; /* Sub-surface weight (set in nearsmth) */ double sd3[3]; /* Deep sub-surface source & destination value */ double w3; /* Deep sub-surface weight */ @@ -201,39 +207,43 @@ struct _nearsmth { double _sr; /* Original source radius */ double naxbf; /* Blend factor that goes to 0.0 at white & black points. */ double aodv[3]; /* Absolute error optimized destination value */ - double nrdv[3]; /* No relative weight optimized destination value */ + double nrdv[3]; /* No relative smoothed destination value */ double anv[3]; /* Average neighborhood target point (relative target) */ double tdst[3]; /* Target destination on gamut */ + int nott; /* NZ if not a point that needs to land on gamut */ double evect[3]; /* Accumulated extension vector direction */ double clen; /* Current correction length needed */ double coff[3]; /* Correction offset */ double rext; double temp[3]; /* General temporary */ - gamut *sgam; /* Source gamut sci_gam = intersection of src and img gamut gamut */ - gamut *dgam; /* Destination gamut di_gam */ + gamut *sgam; /* Source gamut src_gam = intersection of src and img gamut gamut */ + gamut *dgam; /* Intersected destination gamut dst_gam */ + gamut *dcgam; /* Destination Colorspace gamut dc_gam */ int nnd, _nnd; /* No & size of direction neighbour list */ neighb *nd; /* Allocated list of neighbours */ + double nscale[3]; /* Neighborhood scale change from sv to dv */ double dcratio; /* Depth compression ratio */ double dxratio; /* Depth expansion ratio */ - int mapres; /* Target grid res for 3D RSPL */ - int debug; - double dbgv[4]; /* Error components va, vr, vl, vd on last itteration */ + double dbgv[3]; /* Error components va, vr, vd on last itteration */ }; typedef struct _nearsmth nearsmth; /* Return the upper bound on the number of points that will be generated */ int near_smooth_np( + gamut **pp_gam, /* Return gamut that was used for points */ gamut *sc_gam, /* Source colorspace gamut */ gamut *s_gam, /* Source image gamut (== sc_gam if none) */ gamut *d_gam, /* Destination colorspace gamut */ - double xvra /* Extra vertex ratio */ + double xvra, /* Extra vertex ratio */ + int gmult, /* Guide point multiplier, typically 4 */ + int surfgres /* surface grid point resolution, 0 for none */ ); /* Return a list of points. Call free_nearsmth() after use */ @@ -253,11 +263,13 @@ nearsmth *near_smooth( int usecomp, /* Flag indicating whether smoothed compressed value will be used */ int useexp, /* Flag indicating whether smoothed expanded value will be used */ double xvra, /* Extra vertex ratio */ - int mapres, /* Target grid res for 3D RSPL */ + int mapres, /* Target grid res for 3D RSPL, (allowing for gexp) */ double mapsmooth, /* Target smoothing for 3D RSPL */ - datai map_il, /* Preliminary rspl input range */ + double gexp, /* Total grid expansion ratio, none = 1.0 */ + int surfgres, /* Surface grid point resolution, 0 for none */ + datai map_il, /* Return input range */ datai map_ih, - datao map_ol, /* Preliminary rspl output range */ + datao map_ol, /* Return output range */ datao map_oh ); @@ -267,13 +279,21 @@ void free_nearsmth(nearsmth *smp, int npp); /* Expand the compact form of weights into the explicit form. */ int expand_weights(gammapweights out[14], gammapweights *in); -/* Blend a two expanded groups of individual weights into one */ +/* Blend two expanded groups of individual weights into one */ void near_xwblend( gammapweights *dst, gammapweights *src1, double wgt1, gammapweights *src2, double wgt2 ); +/* Blend three expanded groups of individual weights into one */ +void near_xwblend3( +gammapweights *dst, +gammapweights *src1, double wgt1, +gammapweights *src2, double wgt2, +gammapweights *src3, double wgt3 +); + /* Tweak weights acording to extra cmy cusp flags or rel override */ void tweak_weights(gammapweights out[14], int dst_cmymap, int rel_oride); |