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-rw-r--r--gamut/gammap.c325
1 files changed, 220 insertions, 105 deletions
diff --git a/gamut/gammap.c b/gamut/gammap.c
index d463755..638a2cd 100644
--- a/gamut/gammap.c
+++ b/gamut/gammap.c
@@ -45,20 +45,23 @@
#define VERBOSE /* [Def] Print out extra interesting information when verbose is set */
#undef PLOT_DIAG_WRL /* [Und] Always plot "gammap.wrl" */
- /* What do display when user requests disgnostic .wrl */
+ /* What do display when user requests disgnostic VRML/X3D */
#define PLOT_SRC_GMT /* [Def] Plot the source surface to "gammap.wrl" as well */
#define PLOT_DST_GMT /* [Def] Plot the dest surface to "gammap.wrl" as well */
#undef PLOT_SRC_CUSPS /* [Und] Plot the source surface cusps to "gammap.wrl" as well */
#undef PLOT_DST_CUSPS /* [Und] Plot the dest surface cusps to "gammap.wrl" as well */
#undef PLOT_TRANSSRC_CUSPS /* [Und] Plot the gamut mapped source surface cusps to "gammap.wrl" */
-#undef PLOT_AXES /* [Und] Plot the axes to "gammap.wrl" as well */
+#define PLOT_AXES /* [Und] Plot the axes to "gammap.wrl" as well */
#undef SHOW_VECTOR_INDEXES /* [Und] Show the mapping vector index numbers */
-#define SHOW_MAP_VECTORS /* [Def] Show the mapping vectors */
-#undef SHOW_SUB_SURF /* [Und] Show the sub-surface mapping vector */
+#define SHOW_MAP_VECTORS /* [Def] Show the mapping vectors - yellow to red, green to red */
+ /* if no clear direction. */
+#undef SHOW_SUB_SURF /* [Und] Show the sub-surface mapping vector - grey to purple. */
+#undef SHOW_SUB_PNTS /* [Und] Show the sub-surface sv2 (red), div2 (green), sd3 (yellow) pnts */
#undef SHOW_CUSPMAP /* [Und] Show the cusp mapped vectors rather than final vectors */
-#undef SHOW_ACTUAL_VECTORS /* [Und?] Show how the source vectors actually map thought xform */
+#undef SHOW_ACTUAL_VECTORS /* [Und] Show how the source vectors actually map thought xform */
#undef SHOW_ACTUAL_VEC_DIFF /* [Und] Show how the difference between guide and actual vectors */
+ /* Other diagnostics */
#undef PLOT_LMAP /* [Und] Plot L map */
#undef PLOT_GAMUTS /* [Und] Save (part mapped) input and output gamuts as */
/* src.wrl, img.wrl, dst.wrl, gmsrc.wrl */
@@ -75,7 +78,11 @@
#undef PLOT_DIGAM /* [Und] Rather than DST_GMT - don't free it (#def in nearsmth.c too) */
-#define XRES 100 /* Res of plots */
+#define XRES 100 /* [100] Res of plots */
+
+/* The locus.ts file can contain source locus(es) that will be plotted */
+/* as cones in red, with the destination plotted in white. They can */
+/* be created from .tif files using xicc/tiffgmts utility. */
/* Optional marker points for gamut mapping diagnosotic */
struct {
@@ -85,6 +92,7 @@ struct {
double col[3]; /* RGB color */
} markers[] = {
{ 0, }, /* End marker */
+ { 1, { 37.18, 17.78, 20.28 }, { 0.545, 0.357, 0.256 } }, /* Dark Baby skin */
{ 1, { 12.062, -0.87946, 0.97008 }, { 1.0, 0.3, 0.3 } }, /* Black point */
{ 1, { 67.575411, -37.555250, -36.612862 }, { 1.0, 0.3, 0.3 } }, /* bad source in red (Red) */
{ 1, { 61.003078, -44.466554, 1.922585 }, { 0.0, 1.0, 0.3 } }, /* good source in green */
@@ -169,7 +177,7 @@ static void inv_grey_func(void *pp, double *out, double *in);
static void adjust_wb_func(void *pp, double *out, double *in);
static void adjust_sat_func(void *pp, double *out, double *in);
-#define XVRA 4.0 /* Extra mapping vertex ratio over no. tri verts from gamut */
+#define XVRA 3.0 /* [3.0] Extra mapping vertex ratio over no. tri verts from gamut */
/* The smoothed near weighting control values. */
/* These weightings setup the detailed behaviour of the */
@@ -186,16 +194,17 @@ gammapweights pweights[] = {
0.0, /* Cusp chroma alignment weighting 0 = none, 1 = full */
0.3 /* Cusp hue alignment weighting 0 = none, 1 = full */
},
+ 2.0, /* Alignment twist power, 0 = linear, 1 = curve, 2+ late curve */
1.00 /* Chroma expansion 1 = none */
},
- { /* Radial weighting */
+ { /* Radial weighting (currently broken - need to fix) */
0.0, /* Radial error overall weight, 0 + */
0.5, /* Radial hue dominance vs l+c, 0 - 1 */
0.5 /* Radial l dominance vs, c, 0 - 1 */
},
{ /* Weighting of absolute error of destination from source */
1.0, /* Absolute error overall weight */
- 0.6, /* Hue dominance vs l+c, 0 - 1 */
+ 0.8, /* Hue dominance vs l+c, 0 - 1 */
0.8, /* White l dominance vs, c, 0 - 1 */
0.5, /* Grey l dominance vs, c, 0 - 1 */
@@ -221,16 +230,16 @@ gammapweights pweights[] = {
0.0 /* Fine tuning expansion weight, 0 - 1 */
}
},
-#ifdef NEVER
{
- gmm_l_d_blue, /* Increase maintaining hue importance for blue */
+ gmm_light_yellow, /* Treat yellow differently, to get purer result. */
{
{
- -1.0, /* Cusp luminance alignment weighting 0 = none, 1 = full */
- -1.0, /* Cusp chroma alignment weighting 0 = none, 1 = full */
- 0.0 /* Cusp hue alignment weighting 0 = none, 1 = full */
+ 0.9, /* Cusp luminance alignment weighting 0 = none, 1 = full */
+ 0.8, /* Cusp chroma alignment weighting 0 = none, 1 = full */
+ 0.7 /* Cusp hue alignment weighting 0 = none, 1 = full */
},
- -1.0 /* Chroma expansion 1 = none */
+ 4.0, /* Alignment twist power, 0 = linear, 1 = curve, 2+ late curve */
+ 1.20 /* Chroma expansion 1 = none */
},
{ /* Radial weighting */
-1.0, /* Radial error overall weight, 0 + */
@@ -239,7 +248,7 @@ gammapweights pweights[] = {
},
{ /* Weighting of absolute error of destination from source */
-1.0, /* Absolute error overall weight */
- 0.8, /* Hue dominance vs l+c, 0 - 1 */
+ -1.0, /* Hue dominance vs l+c, 0 - 1 */
-1.0, /* White l dominance vs, c, 0 - 1 */
-1.0, /* Grey l dominance vs, c, 0 - 1 */
@@ -252,7 +261,7 @@ gammapweights pweights[] = {
-1.0 /* L error xover threshold in DE */
},
{ /* Relative error preservation using smoothing */
- -1.0, 25.0 /* Relative Smoothing radius L* H* */
+ 20.0, 10.0 /* Relative Smoothing radius L* H* */
},
{ /* Weighting of excessive compression error, which is */
/* the src->dst vector length over the available dst depth. */
@@ -262,19 +271,20 @@ gammapweights pweights[] = {
-1.0 /* Expansion depth weight */
},
{
- -1.0 /* Fine tuning expansion weight, 0 - 1 */
+ 0.5 /* Fine tuning expansion weight, 0 - 1 */
}
},
-#endif /* NEVER */
+#ifdef NEVER
{
- gmm_light_yellow, /* Treat yellow differently, to get purer result. */
+ gmm_l_d_blue, /* Increase maintaining hue importance for blue */
{
{
- 0.9, /* Cusp luminance alignment weighting 0 = none, 1 = full */
- 0.8, /* Cusp chroma alignment weighting 0 = none, 1 = full */
- 0.7 /* Cusp hue alignment weighting 0 = none, 1 = full */
+ -1.0, /* Cusp luminance alignment weighting 0 = none, 1 = full */
+ -1.0, /* Cusp chroma alignment weighting 0 = none, 1 = full */
+ 0.0 /* Cusp hue alignment weighting 0 = none, 1 = full */
},
- 1.15 /* Chroma expansion 1 = none */
+ -1.0, /* 2.0 Alignment twist power, 0 = linear, 1 = curve, 2+ late curve */
+ -1.0 /* Chroma expansion 1 = none */
},
{ /* Radial weighting */
-1.0, /* Radial error overall weight, 0 + */
@@ -283,7 +293,7 @@ gammapweights pweights[] = {
},
{ /* Weighting of absolute error of destination from source */
-1.0, /* Absolute error overall weight */
- -1.0, /* Hue dominance vs l+c, 0 - 1 */
+ 0.8, /* Hue dominance vs l+c, 0 - 1 */
-1.0, /* White l dominance vs, c, 0 - 1 */
-1.0, /* Grey l dominance vs, c, 0 - 1 */
@@ -296,7 +306,7 @@ gammapweights pweights[] = {
-1.0 /* L error xover threshold in DE */
},
{ /* Relative error preservation using smoothing */
- 20.0, 20.0 /* Relative Smoothing radius L* H* */
+ -1.0, 15.0 /* Relative Smoothing radius L* H* */
},
{ /* Weighting of excessive compression error, which is */
/* the src->dst vector length over the available dst depth. */
@@ -306,14 +316,15 @@ gammapweights pweights[] = {
-1.0 /* Expansion depth weight */
},
{
- 0.5 /* Fine tuning expansion weight, 0 - 1 */
+ -1.0 /* Fine tuning expansion weight, 0 - 1 */
}
},
+#endif /* NEVER */
{
gmm_end,
}
};
-double psmooth = 5.0; /* [5.0] Level of RSPL smoothing for perceptual, 1 = nominal */
+double psmooth = 4.0; /* [5.0] Level of RSPL smoothing for perceptual, 1 = nominal */
/* Saturation mapping weights, where saturation has priority over smoothness */
gammapweights sweights[] = {
@@ -325,6 +336,7 @@ gammapweights sweights[] = {
0.5, /* Cusp chroma alignment weighting 0 = none, 1 = full */
0.6 /* Cusp hue alignment weighting 0 = none, 1 = full */
},
+ 1.0, /* Alignment twist power, 0 = linear, 1 = curve, 2+ late curve */
1.05 /* Chroma expansion 1 = none */
},
{ /* Radial weighting */
@@ -347,7 +359,7 @@ gammapweights sweights[] = {
10.0 /* L error extra xover threshold in DE */
},
{ /* Relative vector smoothing */
- 15.0, 20.0 /* Relative Smoothing radius L* H* */
+ 20.0, 25.0 /* Relative Smoothing radius L* H* */
},
{ /* Weighting of excessive compression error, which is */
/* the src->dst vector length over the available dst depth. */
@@ -368,6 +380,7 @@ gammapweights sweights[] = {
1.0, /* Cusp chroma alignment weighting 0 = none, 1 = full */
1.0 /* Cusp hue alignment weighting 0 = none, 1 = full */
},
+ 1.0, /* Alignment twist power, 0 = linear, 1 = curve, 2+ late curve */
1.20 /* Chroma expansion 1 = none */
},
{ /* Radial weighting */
@@ -428,6 +441,7 @@ static void domap(gammap *s, double *out, double *in);
static void dopartialmap1(gammap *s, double *out, double *in);
static void dopartialmap2(gammap *s, double *out, double *in);
static gamut *parttransgamut(gammap *s, gamut *src);
+static void invdomap1(gammap *s, double *out, double *in);
#ifdef PLOT_GAMUTS
static void map_trans(void *cntx, double out[3], double in[3]);
#endif
@@ -487,7 +501,7 @@ gammap *new_gammap(
int j;
#if defined(PLOT_LMAP) || defined(PLOT_GAMUTS) || defined(PLOT_3DKNEES)
- fprintf(stderr,"##### A gammap.c PLOT is #defined ####\n");
+# pragma message("################ A gammap.c PLOT is #defined #########################")
#endif
if (verb) {
@@ -504,6 +518,7 @@ gammap *new_gammap(
/* Setup methods */
s->del = del_gammap;
s->domap = domap;
+ s->invdomap1 = invdomap1;
/* Now create everything */
@@ -898,10 +913,50 @@ glumknf = 1.0;
}
}
- /* To ensure symetry between compression and expansion, always create RSPL */
- /* for compression and its inverse, and then swap grey and igrey rspl to compensate. */
- if ((dwL - dbL) > (swL - sbL))
+#ifdef PLOT_LMAP
+ printf("sbL = %f, swL = %f\n",sbL,swL);
+ printf("dbL = %f, dwL = %f\n",dbL,dwL);
+#endif
+
+ /* Remember our source and destination mapping targets */
+ /* so that we can use them for fine tuning later. */
+
+ /* We scale the source and target white and black */
+ /* points to match the L values of the source and destination */
+ /* L curve mapping, as this is how we have chosen the */
+ /* white and black point mapping for the link. */
+ /* Put them back in pre-rotated space, so that we can */
+ /* check the overall transform of the white and black points. */
+ t = (swL - sr_cs_bp[0])/(sr_cs_wp[0] - sr_cs_bp[0]);
+ for (j = 0; j < 3; j++)
+ s_mt_wp[j] = sr_cs_bp[j] + t * (sr_cs_wp[j] - sr_cs_bp[j]);
+ icmMul3By3x4(s_mt_wp, s->igrot, s_mt_wp);
+
+ t = (sbL - sr_cs_wp[0])/(sr_cs_bp[0] - sr_cs_wp[0]);
+ for (j = 0; j < 3; j++)
+ s_mt_bp[j] = sr_cs_wp[j] + t * (sr_cs_bp[j] - sr_cs_wp[j]);
+//printf("~1 check black point rotated = %f %f %f\n",s_mt_bp[0],s_mt_bp[1],s_mt_bp[2]);
+ icmMul3By3x4(s_mt_bp, s->igrot, s_mt_bp);
+//printf("~1 check black point prerotated = %f %f %f\n",s_mt_bp[0],s_mt_bp[1],s_mt_bp[2]);
+
+ t = (dwL - dr_cs_bp[0])/(dr_cs_wp[0] - dr_cs_bp[0]);
+ for (j = 0; j < 3; j++)
+ d_mt_wp[j] = dr_cs_bp[j] + t * (dr_cs_wp[j] - dr_cs_bp[j]);
+
+ for (j = 0; j < 3; j++)
+ d_mt_bp[j] = dr_cs_wp[j] + t * (dr_cs_bp[j] - dr_cs_wp[j]);
+
+ /* To ensure symetry between compression and expansion, always create RSPL for */
+ /* overall compression and its inverse, and then swap grey and igrey rspl to compensate. */
+ /* We swap the source and desitination white and black points to achieve this. */
+ /* Note that we could still have expansion at one end or the other, depending */
+ /* on the center point location, so we need to allow for this in the rspl setup. */
+ if ((dwL - dbL) > (swL - sbL)) {
+ double tt;
+ tt = swL; swL = dwL; dwL = tt;
+ tt = sbL; sbL = dbL; dbL = tt;
revrspl = 1;
+ }
/* White point end */
lpnts[ngreyp].p[0] = swL;
@@ -913,9 +968,6 @@ glumknf = 1.0;
lpnts[ngreyp].v[0] = dbL;
lpnts[ngreyp++].w = 10.0; /* Must go through here */
-//printf("~1 white loc %f, val %f\n",swL,dwL);
-//printf("~1 black loc %f, val %f\n",sbL,dbL);
-
#ifdef USE_GLUMKNF
if (gmi->glumknf < 0.05)
#endif /* USE_GLUMKNF */
@@ -931,33 +983,42 @@ glumknf = 1.0;
#ifdef USE_GLUMKNF
else { /* There is at least some weight in knee points */
double cppos = 0.50; /* Center point ratio between black and white */
- double cplv; /* Center point location and value */
- double kppos = 0.30; /* Knee point ratio between white/black & center */
+ double cpll, cplv; /* Center point location and value */
+ double kpwpos = 0.30; /* White knee point location prop. towards center */
+ double kpbpos = 0.20; /* Black knee point location prop. towards center */
double kwl, kbl, kwv, kbv; /* Knee point values and locations */
double kwx, kbx; /* Knee point extra */
+#ifdef PLOT_LMAP
+ printf("%ssbL = %f, swL = %f\n", revrspl ? "(swapped) ": "", sbL,swL);
+ printf("%sdbL = %f, dwL = %f\n", revrspl ? "(swapped) ": "", dbL,dwL);
+#endif
-//printf("sbL = %f, swL = %f\n",sbL,swL);
-//printf("dbL = %f, dwL = %f\n",dbL,dwL);
-
- /* Center point */
+ /* Center point location */
+ cpll = cppos * (swL - sbL) + sbL;
+ // ~~?? would this be better if the output
+ // was scaled by dwL/swL ?
cplv = cppos * (swL - sbL) + sbL;
-//printf("~1 computed cplv = %f\n",cplv);
+#ifdef PLOT_LMAP
+ printf("cpll = %f, cplv = %f\n",cpll, cplv);
+#endif
#ifdef NEVER /* Don't use a center point */
- lpnts[ngreyp].p[0] = cplv;
+ lpnts[ngreyp].p[0] = cpll;
lpnts[ngreyp].v[0] = cplv;
- lpnts[ngreyp++].w = 0.5;
+ lpnts[ngreyp++].w = 5.0;
#endif
//printf("~1 black half diff = %f\n",dbL - sbL);
//printf("~1 white half diff = %f\n",dwL - swL);
/* Knee point locations */
- kwl = kppos * (cplv - swL) + swL;
- kbl = kppos * (cplv - sbL) + sbL;
+ kwl = kpwpos * (cplv - swL) + swL;
+ kbl = kpbpos * (cplv - sbL) + sbL;
/* Extra compression for white and black knees */
+ // ~~ ie move knee point level beyond 45 degree line
+ // ~~ weigting of black point and white point differences
kwx = 0.6 * (dbL - sbL) + 1.0 * (swL - dwL);
kbx = 1.0 * (dbL - sbL) + 0.6 * (swL - dwL);
@@ -975,47 +1036,22 @@ glumknf = 1.0;
kbv = dbL;
-//printf("~1 kbl = %f, kbv = %f\n",kbl, kbv);
-//printf("~1 kwl = %f, kwv = %f\n",kwl, kwv);
+#ifdef PLOT_LMAP
+ printf("using kbl = %f, kbv = %f\n",kbl, kbv);
+ printf("using kwl = %f, kwv = %f\n",kwl, kwv);
+#endif
- /* Emphasise points to cause "knee" curve */
+ /* Emphasise points to cause white "knee" curve */
lpnts[ngreyp].p[0] = kwl;
lpnts[ngreyp].v[0] = kwv;
lpnts[ngreyp++].w = gmi->glumknf * gmi->glumknf;
+ /* Emphasise points to cause black "knee" curve */
lpnts[ngreyp].p[0] = kbl;
lpnts[ngreyp].v[0] = kbv;
lpnts[ngreyp++].w = 1.5 * gmi->glumknf * 1.5 * gmi->glumknf;
}
#endif /* USE_GLUMKNF */
-
- /* Remember our source and destinatio mapping targets */
- /* so that we can use them for fine tuning later. */
-
- /* We scale the source and target white and black */
- /* points to match the L values of the source and destination */
- /* L curve mapping, as this is how we have chosen the */
- /* white and black point mapping for the link. */
- /* Put them back in pre-rotated space, so that we can */
- /* check the overall transform of the white and black points. */
- t = (swL - sr_cs_bp[0])/(sr_cs_wp[0] - sr_cs_bp[0]);
- for (j = 0; j < 3; j++)
- s_mt_wp[j] = sr_cs_bp[j] + t * (sr_cs_wp[j] - sr_cs_bp[j]);
- icmMul3By3x4(s_mt_wp, s->igrot, s_mt_wp);
-
- t = (sbL - sr_cs_wp[0])/(sr_cs_bp[0] - sr_cs_wp[0]);
- for (j = 0; j < 3; j++)
- s_mt_bp[j] = sr_cs_wp[j] + t * (sr_cs_bp[j] - sr_cs_wp[j]);
-//printf("~1 check black point rotated = %f %f %f\n",s_mt_bp[0],s_mt_bp[1],s_mt_bp[2]);
- icmMul3By3x4(s_mt_bp, s->igrot, s_mt_bp);
-//printf("~1 check black point prerotated = %f %f %f\n",s_mt_bp[0],s_mt_bp[1],s_mt_bp[2]);
-
- t = (dwL - dr_cs_bp[0])/(dr_cs_wp[0] - dr_cs_bp[0]);
- for (j = 0; j < 3; j++)
- d_mt_wp[j] = dr_cs_bp[j] + t * (dr_cs_wp[j] - dr_cs_bp[j]);
-
- for (j = 0; j < 3; j++)
- d_mt_bp[j] = dr_cs_wp[j] + t * (dr_cs_bp[j] - dr_cs_wp[j]);
}
/* We now create the 1D rspl L map, that compresses or expands the luminence */
@@ -1031,15 +1067,6 @@ glumknf = 1.0;
double avgdev[MXDO];
int gres = 256;
- if (revrspl) { /* Invert creation and usage for symetry between compress and exp. */
- int i;
- for (i = 0; i < ngreyp; i++) {
- double tt = lpnts[i].p[0]; /* Swap source and dest */
- lpnts[i].p[0] = lpnts[i].v[0];
- lpnts[i].v[0] = tt;
- }
- }
-
/* Create a 1D rspl, that is used to */
/* form the overall L compression mapping. */
if ((s->grey = new_rspl(RSPL_NOFLAGS, 1, 1)) == NULL) /* Allocate 1D -> 1D */
@@ -1076,7 +1103,7 @@ glumknf = 1.0;
/* Create it from inverse lookups of s->grey */
s->igrey->set_rspl(s->igrey, 0, (void *)s->grey, inv_grey_func, il, ih, &gres, ol, oh);
- if (revrspl) { /* Swap to compensate for expansion */
+ if (revrspl) { /* Swap to compensate for swapping of white and black points */
rspl *tt = s->grey;
s->grey = s->igrey;
s->igrey = tt;
@@ -1140,6 +1167,7 @@ glumknf = 1.0;
/* if there is any compression or expansion to do. */
if (gmi->gamcpf > 1e-6 || gmi->gamexf > 1e-6) {
cow *gpnts = NULL; /* Mapping points to create gamut mapping */
+ int max_gpnts;
int nspts; /* Number of source gamut surface points */
int rgridpts; /* Number of range surface grid points */
int i, j;
@@ -1175,7 +1203,8 @@ typedef struct {
}
#endif
- if ((gpnts = (cow *)malloc((nres + 3 * nspts + rgridpts) * sizeof(cow))) == NULL) {
+ max_gpnts = nres + 3 * nspts + rgridpts;
+ if ((gpnts = (cow *)malloc(max_gpnts * sizeof(cow))) == NULL) {
fprintf(stderr,"gamut map: Malloc of mapping setup points failed\n");
s->grey->del(s->grey);
s->igrey->del(s->igrey);
@@ -1275,6 +1304,8 @@ typedef struct {
gpnts[ngamp].w);
#endif
ngamp++;
+ if (ngamp >= max_gpnts)
+ error("gammap: internal, not enough space for mapping points A (%d > %d)\n",ngamp, max_gpnts);
}
#endif /* USE_GREYMAP */
@@ -1436,10 +1467,10 @@ typedef struct {
doaxes = 1;
#endif
if (diagname != NULL)
- wrl = new_vrml(diagname, doaxes, 0);
+ wrl = new_vrml(diagname, doaxes, vrml_lab);
#ifdef PLOT_DIAG_WRL
else
- wrl = new_vrml("gammap.wrl", doaxes, 0);
+ wrl = new_vrml("gammap", doaxes, vrml_lab);
#endif
}
@@ -1513,31 +1544,51 @@ typedef struct {
}
gpnts[ngamp++].w = 1.01; /* Main gamut surface mapping point */
/* (Use 1.01 as a marker value) */
+ if (ngamp >= max_gpnts)
+ error("gammap: internal, not enough space for mapping points B (%d > %d)\n",ngamp, max_gpnts);
#ifdef USE_GAMKNF
/* Add sub surface mapping point if available */
if (nsm[i].vflag != 0) { /* Sub surface point is available */
/* Compute destination value which is a blend */
- /* between the source value and the fully mapped destination value. */
+ /* between the source value and the knee adjusted destination */
icmBlend3(nsm[i].div2, nsm[i].sv2, nsm[i].dv2, cpexf);
#ifdef NEVER
printf("Src2 point = %f %f %f radius %f\n",nsm[i].sv2[0], nsm[i].sv2[1], nsm[i].sv2[2], nsm[i].sr);
printf("Dst2 point = %f %f %f radius %f\n",nsm[i].dv2[0], nsm[i].dv2[1], nsm[i].dv2[2], nsm[i].dr);
printf("Blended dst2 point = %f %f %f\n",nsm[i].div2[0], nsm[i].div2[1], nsm[i].div2[2]);
+ printf("Src/Dst3 point = %f %f %f w %f\n",nsm[i].sd2[0], nsm[i].sd2[1], nsm[i].sd2[2]);
printf("\n");
#endif /* NEVER */
+
/* Set the sub-surface gamut hull mapping point */
for (j = 0; j < 3; j++) {
gpnts[ngamp].p[j] = nsm[i].sv2[j];
gpnts[ngamp].v[j] = nsm[i].div2[j];
}
gpnts[ngamp++].w = nsm[i].w2; /* Sub-suface mapping points */
+
+ if (ngamp >= max_gpnts)
+ error("gammap: internal, not enough space for mapping points C (%d > %d)\n",ngamp, max_gpnts);
+
+ /* Set the sub-surface gamut hull mapping point */
+ for (j = 0; j < 3; j++) {
+ gpnts[ngamp].p[j] = nsm[i].sd3[j];
+ gpnts[ngamp].v[j] = nsm[i].sd3[j];
+ }
+ gpnts[ngamp++].w = nsm[i].w3; /* Sub-suface mapping points */
+
+ if (ngamp >= max_gpnts)
+ error("gammap: internal, not enough space for mapping points D (%d > %d)\n",ngamp, max_gpnts);
}
#endif /* USE_GAMKNF */
}
+ if (ngamp >= max_gpnts)
+ error("gammap: internal, not enough space for mapping points (%d > %d)\n",ngamp, max_gpnts);
+
/* Create preliminary gamut mapping rspl, without grid boundary values. */
/* We use this to lookup the mapping for points on the source space gamut */
/* that result from clipping our grid boundary points */
@@ -1601,6 +1652,9 @@ typedef struct {
/* A low weight seems to be enough ? */
/* the lower the better in terms of geting best hull mapping fidelity */
gpnts[ngamp++].w = 0.05 * ww;
+
+ if (ngamp >= max_gpnts)
+ error("gammap: internal, not enough space for mapping points E (%d > %d)\n",ngamp, max_gpnts);
}
DC_INC(gc);
if (DC_DONE(gc))
@@ -1833,11 +1887,11 @@ typedef struct {
/* Add the source and dest gamut surfaces */
#ifdef PLOT_SRC_GMT
- wrl->make_gamut_surface_2(wrl, sil_gam, 0.6, 0, cc);
+ wrl->make_gamut_surface_2(wrl, sil_gam, 0.6, 0, cc); /* Grey */
#endif /* PLOT_SRC_GMT */
#ifdef PLOT_DST_GMT
cc[0] = -1.0;
- wrl->make_gamut_surface(wrl, d_gam, 0.2, cc);
+ wrl->make_gamut_surface(wrl, d_gam, 0.3, cc); /* Natural color */
#endif /* PLOT_DST_GMT */
#ifdef PLOT_DIGAM
if (nsm[0].dgam == NULL)
@@ -1918,7 +1972,6 @@ typedef struct {
# ifdef SHOW_SUB_SURF
if (nsm[i].vflag != 0) { /* Sub surface point is available */
-
wrl->add_col_vertex(wrl, 0, nsm[i].sv2, lgrey); /* Subs-surf Source value */
wrl->add_col_vertex(wrl, 0, nsm[i].div2, purp); /* Blended destination value */
}
@@ -1928,14 +1981,29 @@ typedef struct {
wrl->make_lines(wrl, 0, 2); /* Guide vectors */
#endif /* Show vectors */
-#ifdef SHOW_VECTOR_INDEXES
+#if defined(SHOW_VECTOR_INDEXES) || defined(SHOW_SUB_PNTS)
for (i = 0; i < nnsm; i++) {
- double cream[3] = { 0.7, 0.7, 0.5 };
- char buf[100];
- sprintf(buf, "%d", i);
- wrl->add_text(wrl, buf, nsm[i].sv, cream, 0.5);
- }
+#ifdef SHOW_VECTOR_INDEXES
+ {
+ double cream[3] = { 0.7, 0.7, 0.5 };
+ char buf[100];
+ sprintf(buf, "%d", i);
+ wrl->add_text(wrl, buf, nsm[i].sv, cream, 0.5);
+ }
#endif /* SHOW_VECTOR_INDEXES */
+# ifdef SHOW_SUB_PNTS
+ if (nsm[i].vflag != 0) { /* Sub surface point is available */
+ double red[3] = { 1.0, 0.0, 0.0 };
+ double green[3] = { 0.0, 1.0, 0.0 };
+ double yellow[3] = { 1.0, 1.0, 0.0 };
+
+ wrl->add_marker(wrl, nsm[i].sv2, red, 1.0); /* Subs-surf Source value */
+ wrl->add_marker(wrl, nsm[i].div2, green, 1.0); /* Blended destination value */
+ wrl->add_marker(wrl, nsm[i].sd3, yellow, 1.0); /* Deep sub-surface point */
+ }
+# endif /* SHOW_SUB_PNTS */
+ }
+#endif
/* add the locus from locus.ts file */
if (locus != NULL) {
@@ -2184,10 +2252,10 @@ typedef struct {
}
#ifdef PLOT_GAMUTS
- scl_gam->write_vrml(scl_gam, "src.wrl", 1, 0);
- sil_gam->write_vrml(sil_gam, "img.wrl", 1, 0);
- d_gam->write_vrml(d_gam, "dst.wrl", 1, 0);
- sc_gam->write_trans_vrml(sc_gam, "gmsrc.wrl", 1, 0, map_trans, s);
+ scl_gam->write_vrml(scl_gam, "src", 1, 0);
+ sil_gam->write_vrml(sil_gam, "img", 1, 0);
+ d_gam->write_vrml(d_gam, "dst", 1, 0);
+ sc_gam->write_trans_vrml(sc_gam, "gmsrc", 1, 0, map_trans, s);
#endif
if (sil_gam != scl_gam)
@@ -2222,6 +2290,8 @@ gammap *s
free(s);
}
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
/* Apply the gamut mapping to the given color value */
static void domap(
gammap *s,
@@ -2336,6 +2406,51 @@ double *in
}
}
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+/* powell function - minimise error to target */
+static double invgmfunc(
+void *fdata,
+double *tp
+) {
+ gammap *s = (gammap *)fdata;
+ int i;
+ double gmv[3];
+ double tt, rv = 0.0;
+
+ domap(s, gmv, tp);
+ for (i = 0; i < 3; i++) {
+ double tt = gmv[i] - s->tv[i];
+ rv += tt * tt;
+ }
+
+ return rv;
+}
+
+/* Invert a gamut mapping using powell */
+static void invdomap1(
+gammap *s,
+double *out,
+double *in
+) {
+ double ss[3] = { 20.0, 20.0, 20.0 }; /* search area */
+ double tp[3], rv;
+
+ s->tv[0] = tp[0] = in[0];
+ s->tv[1] = tp[1] = in[1];
+ s->tv[2] = tp[2] = in[2];
+
+ if (powell(&rv, 3, tp, ss, 1e-7, 5000, invgmfunc, (void *)s, NULL, NULL) != 0) {
+ warning("gamut invdomap1 failed on %f %f %f\n", in[0], in[1], in[2]);
+ }
+
+ out[0] = tp[0];
+ out[1] = tp[1];
+ out[2] = tp[2];
+}
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
/* Function to pass to rspl to invert grey curve */
static void inv_grey_func(
void *cntx,
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 12:07:11 +0000