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-rw-r--r--xicc/xicc.c466
1 files changed, 363 insertions, 103 deletions
diff --git a/xicc/xicc.c b/xicc/xicc.c
index 9b6d867..a1c4531 100644
--- a/xicc/xicc.c
+++ b/xicc/xicc.c
@@ -61,7 +61,7 @@ static icxLuBase *xicc_set_luobj(xicc *p, icmLookupFunc func, icRenderingIntent
icmLookupOrder order, int flags, int no, int nobw, cow *points,
icxMatrixModel *skm,
double dispLuminance, double wpscale, double smooth, double avgdev,
- icxViewCond *vc, icxInk *ink, xcal *cal, int quality);
+ double demph, icxViewCond *vc, icxInk *ink, xcal *cal, int quality);
static void icxLutSpaces(icxLuBase *p, icColorSpaceSignature *ins, int *inn,
icColorSpaceSignature *outs, int *outn,
icColorSpaceSignature *pcs);
@@ -929,7 +929,7 @@ icxInk *ink /* inking details (NULL for default) */
icRenderingIntent n_intent = intent; /* Native Intent to request */
icColorSpaceSignature n_pcs = icmSigDefaultData; /* Native PCS to request */
-//printf("~1 xicc_get_luobj got intent %s and pcsor %s\n",icx2str(icmRenderingIntent,intent),icx2str(icmColorSpaceSignature,pcsor));
+//printf("~1 xicc_get_luobj got intent '%s' and pcsor '%s'\n",icx2str(icmRenderingIntent,intent),icx2str(icmColorSpaceSignature,pcsor));
/* Ensure that appropriate PCS is slected for an appearance intent */
if (intent == icxAppearance
@@ -939,6 +939,7 @@ icxInk *ink /* inking details (NULL for default) */
|| intent == icxSaturationAppearance
|| intent == icxAbsSaturationAppearance) {
pcsor = icxSigJabData;
+//printf("~1 pcsor = %s\n",tag2str(pcsor));
/* Translate non-Jab intents to the equivalent appearance "intent" if pcsor == Jab. */
/* This is how we get these when the UI's don't list all the apperances intents, */
@@ -960,6 +961,7 @@ icxInk *ink /* inking details (NULL for default) */
else
intent = icxAppearance;
}
+//printf("~1 intent = %s\n",tag2str(intent));
/* Translate intent asked for into intent needed in icclib */
if (intent == icxAppearance
@@ -971,6 +973,7 @@ icxInk *ink /* inking details (NULL for default) */
else if (intent == icxSaturationAppearance
|| intent == icxAbsSaturationAppearance)
n_intent = icmAbsoluteSaturation;
+//printf("~1 n_intent = %s\n",tag2str(n_intent));
if (pcsor != icmSigDefaultData)
n_pcs = pcsor; /* There is an icclib override */
@@ -995,15 +998,16 @@ icxInk *ink /* inking details (NULL for default) */
&& (intent == icxAbsAppearance
|| intent == icxAbsPerceptualAppearance
|| intent == icxAbsSaturationAppearance)) { /* make sure its "Abs CAM" */
+//printf("~1 xicc_get_luobj using absolute apperance space with white = D50\n");
/* Set white point and flare color to D50 */
/* (Hmm. This doesn't match what happens within collink with absolute intent!!) */
vc->Wxyz[0] = icmD50.X/icmD50.Y;
vc->Wxyz[1] = icmD50.Y/icmD50.Y; // Normalise white reference to Y = 1 ?
vc->Wxyz[2] = icmD50.Z/icmD50.Y;
- vc->Fxyz[0] = icmD50.X;
- vc->Fxyz[1] = icmD50.Y;
- vc->Fxyz[2] = icmD50.Z;
+ vc->Gxyz[0] = icmD50.X;
+ vc->Gxyz[1] = icmD50.Y;
+ vc->Gxyz[2] = icmD50.Z;
}
/* Call xiccLu wrapper creation */
@@ -1054,6 +1058,7 @@ double dispLuminance, /* > 0.0 if display luminance value and is known */
double wpscale, /* > 0.0 if input white point is to be scaled */
double smooth, /* RSPL smoothing factor, -ve if raw */
double avgdev, /* reading Average Deviation as a proportion of the input range */
+double demph, /* dark emphasis factor for cLUT grid res. */
icxViewCond *vc, /* Viewing Condition (NULL if not using CAM) */
icxInk *ink, /* inking details (NULL for default) */
xcal *cal, /* Optional cal, will override any existing (not deleted with xicc)*/
@@ -1104,7 +1109,7 @@ int quality /* Quality metric, 0..3 */
case icmLutType:
/* ~~~ Should add check that it is a fwd profile ~~~ */
- xplu = set_icxLuLut(p, plu, func, intent, flags, no, nobw, points, skm, dispLuminance, wpscale, smooth, avgdev, vc, ink, quality);
+ xplu = set_icxLuLut(p, plu, func, intent, flags, no, nobw, points, skm, dispLuminance, wpscale, smooth, avgdev, demph, vc, ink, quality);
break;
default:
@@ -1217,7 +1222,8 @@ icxViewCond *vc /* Viewing parameters to return */
double Lvr = -1.0; /* Reflective device image luminance */
double Lv = -1.0; /* device image luminance */
double Yf = -1.0; /* Flare relative luminance to Lv */
- double Fxyz[3] = {-1.0, -1.0, -1.0}; /* Flare color */
+ double Yg = -1.0; /* Glare relative luminance to La */
+ double Gxyz[3] = {-1.0, -1.0, -1.0}; /* Glare color */
icTechnologySignature tsig = icMaxEnumTechnology; /* Technology Signature */
icProfileClassSignature devc = icMaxEnumClass;
int trans = -1; /* Set to 0 if not transparency, 1 if it is */
@@ -1241,7 +1247,8 @@ icxViewCond *vc /* Viewing parameters to return */
if ((ro = (icmMeasurement *)pp->read_tag(pp, icSigMeasurementTag)) != NULL
&& ro->ttype == icSigMeasurementType) {
- Yf = ro->flare;
+ Yf = 0.0 * ro->flare; // ?????
+ Yg = 1.0 * ro->flare; // ?????
/* ro->illuminant ie D50, D65, D93, A etc. */
}
}
@@ -1345,7 +1352,8 @@ icxViewCond *vc /* Viewing parameters to return */
printf("Reflective Image White Lvr = %f\n",Lvr);
printf("Device Image White Lv = %f\n",Lv);
printf("Relative Flare Yf = %f\n",Yf);
- printf("Flare color %f %f %f\n",Fxyz[0], Fxyz[1], Fxyz[2]);
+ printf("Relative Glare Yg = %f\n",Yg);
+ printf("Glare color %f %f %f\n",Gxyz[0], Gxyz[1], Gxyz[2]);
printf("Technology = %s\n",tag2str(tsig));
printf("deviceClass = %s\n",tag2str(devc));
printf("Transparency = %d\n",trans);
@@ -1357,7 +1365,8 @@ icxViewCond *vc /* Viewing parameters to return */
&& Yb >= 0.0
&& Lv >= 0.0
&& Yf >= 0.0
- && Fxyz[0] >= 0.0 && Fxyz[1] >= 0.0 && Fxyz[2] >= 0.0) {
+ && Yg >= 0.0
+ && Gxyz[0] >= 0.0 && Gxyz[1] >= 0.0 && Gxyz[2] >= 0.0) {
vc->Ev = vc_none;
vc->Wxyz[0] = Wxyz[0];
@@ -1367,9 +1376,10 @@ icxViewCond *vc /* Viewing parameters to return */
vc->Yb = Yb;
vc->Lv = Lv;
vc->Yf = Yf;
- vc->Fxyz[0] = Fxyz[0];
- vc->Fxyz[1] = Fxyz[1];
- vc->Fxyz[2] = Fxyz[2];
+ vc->Yg = Yg;
+ vc->Gxyz[0] = Gxyz[0];
+ vc->Gxyz[1] = Gxyz[1];
+ vc->Gxyz[2] = Gxyz[2];
return 0;
}
@@ -1400,9 +1410,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_average; /* Assume average viewing conditions */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.01; /* Assume 1% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1419,9 +1431,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_average; /* Assume average viewing conditions */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.005; /* Assume 0.5% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1437,8 +1451,12 @@ icxViewCond *vc /* Viewing parameters to return */
Ev = vc_average; /* Assume average viewing conditions */
if (Yf < 0.0) /* No flare figure */
Yf = 0.0; /* Assume 0% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1453,9 +1471,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_dim; /* Assume dim viewing conditions */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.01; /* Assume 1% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1472,9 +1492,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_average; /* Assume average viewing conditions */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.02; /* Assume 2% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1489,9 +1511,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_average; /* Assume average viewing conditions */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.00; /* Assume 0% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.0; /* Assume 0% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1507,9 +1531,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_dim; /* Dim environment */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.01; /* Assume 1% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
/* Assume very darkened room, no background */
@@ -1522,9 +1548,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_dark; /* Dark environment */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.01; /* Assume 1% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1549,9 +1577,11 @@ icxViewCond *vc /* Viewing parameters to return */
if (Lv < 0.0) /* No device image luminance */
Ev = vc_average; /* Assume average viewing conditions */
if (Yf < 0.0) /* No flare figure */
- Yf = 0.01; /* Assume 1% flare */
- if (Fxyz[0] < 0.0 || Fxyz[1] < 0.0 || Fxyz[2] < 0.0) /* No flare color */
- Fxyz[0] = Wxyz[0], Fxyz[1] = Wxyz[1], Fxyz[2] = Wxyz[2];
+ Yf = 0.0; /* Assume 0% flare */
+ if (Yg < 0.0) /* No glare figure */
+ Yg = 0.01; /* Assume 1% glare */
+ if (Gxyz[0] < 0.0 || Gxyz[1] < 0.0 || Gxyz[2] < 0.0) /* No flare color */
+ Gxyz[0] = Wxyz[0], Gxyz[1] = Wxyz[1], Gxyz[2] = Wxyz[2];
break;
}
@@ -1623,19 +1653,20 @@ double *wp /* Provide white point if xicc is NULL */
}
}
- /* Set a default flare color */
- vc->Fxyz[0] = vc->Wxyz[0];
- vc->Fxyz[1] = vc->Wxyz[1];
- vc->Fxyz[2] = vc->Wxyz[2];
+ /* Set a default Glare color */
+ vc->Gxyz[0] = vc->Wxyz[0];
+ vc->Gxyz[1] = vc->Wxyz[1];
+ vc->Gxyz[2] = vc->Wxyz[2];
}
/*
Typical adapting field luminances and white luminance in reflective setup:
+ (Note that displays Lv is typically brighter under the same conditions)
E = illuminance in Lux
- Lv = White luminance assuming 100% reflectance
La = Adapting field luminance in cd/m^2, assuming 20% reflectance from surround
+ Lv = White luminance assuming 100% reflectance
E La Lv Condition
11 0.7 4 Twilight
@@ -1651,6 +1682,22 @@ double *wp /* Provide white point if xicc is NULL */
10000 637 3183 Typical outdoors, full daylight
50000 3185 15915 Bright summers day
+ Display numbers:
+
+ SMPTE video standard white 100
+ SMPTE cinema standard white 55
+
+ Flare is image content dependent, and is typically 1% from factors
+ including display self illumination and observer/camera internal
+ stray light. Because image content is not static, using a 1% of white point
+ flare results quite erronious appearance modelling for predominantly
+ dark images. As a result, it is best to default to a Yf of 0%,
+ and only introduce a higher number depending on the known image content.
+
+ Glare is assumed to be from the ambient light reflecting from the display
+ and also striking the observer directly, and is (typically) defaulted
+ to 1% of ambient here.
+
*/
if (no == -1
@@ -1663,7 +1710,22 @@ double *wp /* Provide white point if xicc is NULL */
vc->La = 50.0; /* Practical to Good lighting */
vc->Lv = 250.0; /* Average viewing conditions ratio */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
+ }
+ }
+ else if (no == 2
+ || (as != NULL && stricmp(as,"pc") == 0)) {
+
+ no = 2;
+ if (vc != NULL) {
+ vc->desc = " pc - Critical print evaluation environment (ISO-3664 P1)";
+ vc->Ev = vc_average; /* Average viewing conditions */
+ vc->La = 127.0; /* 0.2 * Lv ? */
+ vc->Lv = 2000.0/3.1415; /* White of the image field */
+ vc->Yb = 0.2; /* Grey world */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 0
@@ -1672,10 +1734,12 @@ double *wp /* Provide white point if xicc is NULL */
no = 0;
if (vc != NULL) {
vc->desc = " pp - Practical Reflection Print (ISO-3664 P2)";
- vc->Ev = vc_average; /* Average viewing conditions */
- vc->La = 32.0; /* Use a practical print evaluation number */
+ vc->Ev = vc_none; /* Use explicit La/Lv */
+ vc->La = 32.0; /* 0.2 * Lv ? */
+ vc->Lv = 500.0/3.1415; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 1
@@ -1684,22 +1748,26 @@ double *wp /* Provide white point if xicc is NULL */
no = 1;
if (vc != NULL) {
vc->desc = " pe - Print evaluation environment (CIE 116-1995)";
- vc->Ev = vc_average; /* Average viewing conditions */
- vc->La = 64.0; /* Good */
+ vc->Ev = vc_none; /* Use explicit La/Lv */
+ vc->La = 30.0; /* 0.2 * Lv ? */
+ vc->Lv = 150.0; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
- else if (no == 2
- || (as != NULL && stricmp(as,"pc") == 0)) {
+ else if (no == 4
+ || (as != NULL && stricmp(as,"mb") == 0)) {
- no = 2;
+ no = 4;
if (vc != NULL) {
- vc->desc = " pc - Critical print evaluation environment (ISO-3664 P1)";
- vc->Ev = vc_average; /* Average viewing conditions */
- vc->La = 127.0; /* Critical */
+ vc->desc = " mb - Bright monitor in bright work environment";
+ vc->Ev = vc_none; /* Use explicit La/Lv */
+ vc->La = 42.0; /* Bright work environment */
+ vc->Lv = 150.0; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 3
@@ -1708,22 +1776,12 @@ double *wp /* Provide white point if xicc is NULL */
no = 3;
if (vc != NULL) {
vc->desc = " mt - Monitor in typical work environment";
- vc->Ev = vc_average; /* Average viewing conditions */
+ vc->Ev = vc_none; /* Use explicit La/Lv */
vc->La = 22.0; /* Typical work environment */
+ vc->Lv = 120.0; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.02; /* 2% flare */
- }
- }
- else if (no == 4
- || (as != NULL && stricmp(as,"mb") == 0)) {
-
- no = 4;
- if (vc != NULL) {
- vc->desc = " mb - Bright monitor in bright work environment";
- vc->Ev = vc_average; /* Average viewing conditions */
- vc->La = 42.0; /* Bright work environment */
- vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.02; /* 2% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 5
@@ -1732,10 +1790,12 @@ double *wp /* Provide white point if xicc is NULL */
no = 5;
if (vc != NULL) {
vc->desc = " md - Monitor in darkened work environment";
- vc->Ev = vc_dim; /* Dim viewing conditions */
- vc->La = 4.0; /* Darkened work environment */
+ vc->Ev = vc_none; /* Use explicit La/Lv */
+ vc->La = 10.0; /* Darkened work environment */
+ vc->Lv = 100.0; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 6
@@ -1744,10 +1804,12 @@ double *wp /* Provide white point if xicc is NULL */
no = 6;
if (vc != NULL) {
vc->desc = " jm - Projector in dim environment";
- vc->Ev = vc_dim; /* Dim viewing conditions */
+ vc->Ev = vc_none; /* Use explicit La/Lv */
vc->La = 10.0; /* Adaptation is from display */
+ vc->Lv = 80.0; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 7
@@ -1756,46 +1818,65 @@ double *wp /* Provide white point if xicc is NULL */
no = 7;
if (vc != NULL) {
vc->desc = " jd - Projector in dark environment";
- vc->Ev = vc_dark; /* Dark viewing conditions */
- vc->La = 10.0; /* Adaptation is from display */
+ vc->Ev = vc_none; /* Use explicit La/Lv */
+ vc->La = 8.0; /* Adaptation is from display */
+ vc->Lv = 80.0; /* White of the image field */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare ? */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else if (no == 8
- || (as != NULL && stricmp(as,"pcd") == 0)) {
+ || (as != NULL && stricmp(as,"tv") == 0)) {
no = 8;
if (vc != NULL) {
+ vc->desc = " tv - Television/Film Studio";
+ vc->Ev = vc_none; /* Compute from La/Lv */
+ vc->La = 0.2 * 1000.0/3.1415; /* Adative/Surround */
+ vc->Yb = 0.2; /* Grey world */
+ vc->Lv = 1000.0/3.1415; /* White of the image field */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
+ }
+ }
+ else if (no == 9
+ || (as != NULL && stricmp(as,"pcd") == 0)) {
+
+ no = 9;
+ if (vc != NULL) {
vc->desc = "pcd - Photo CD - original scene outdoors";
vc->Ev = vc_average; /* Average viewing conditions */
vc->La = 320.0; /* Typical outdoors, 1600 cd/m^2 */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.00; /* 0% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.0; /* 0% glare - assumed to be compensated ? */
}
}
- else if (no == 9
+ else if (no == 10
|| (as != NULL && stricmp(as,"ob") == 0)) {
- no = 9;
+ no = 10;
if (vc != NULL) {
vc->desc = " ob - Original scene - Bright Outdoors";
vc->Ev = vc_average; /* Average viewing conditions */
vc->La = 2000.0; /* Bright Outdoors */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.00; /* 0% flare */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.0; /* 0% glare - assumed to be compensated ? */
}
}
- else if (no == 10
+ else if (no == 11
|| (as != NULL && stricmp(as,"cx") == 0)) {
- no = 10;
+ no = 11;
if (vc != NULL) {
vc->desc = " cx - Cut Sheet Transparencies on a viewing box";
vc->Ev = vc_cut_sheet; /* Cut sheet viewing conditions */
vc->La = 53.0; /* Dim, adapted to slide ? */
vc->Yb = 0.2; /* Grey world */
- vc->Yf = 0.01; /* 1% flare ? */
+ vc->Yf = 0.0; /* 0% flare */
+ vc->Yg = 0.01; /* 1% glare */
}
}
else {
@@ -1828,7 +1909,8 @@ icxViewCond *vc
if (vc->Ev == vc_none)
printf(" Image luminance = %f cd/m^2\n",vc->Lv);
printf(" Flare to image ratio = %f\n",vc->Yf);
- printf(" Flare color = %f %f %f\n",vc->Fxyz[0], vc->Fxyz[1], vc->Fxyz[2]);
+ printf(" Glare to ambient ratio = %f\n",vc->Yg);
+ printf(" Flare color = %f %f %f\n",vc->Gxyz[0], vc->Gxyz[1], vc->Gxyz[2]);
}
@@ -1899,11 +1981,11 @@ int no, /* Enumeration selected, icxNoGMIntent for none */
char *as /* Alias string selector, NULL for none */
) {
#ifdef USE_CAM
- int colccas = 0x2; /* Use cas clipping for colorimetric style intents */
- int perccas = 0x1; /* Use cas for perceptual style intents */
+ int colccas = 0x3; /* Use abs. CAS for abs colorimetric intents */
+ int perccas = 0x2; /* Use CAS for other intents */
#else
- int colccas = 0x0; /* Use Lab for colorimetric style intents */
- int perccas = 0x0; /* Use Lab for perceptual style intents */
+ int colccas = 0x1; /* Use abs. Lab for abs colorimetric intents */
+ int perccas = 0x0; /* Use Lab for other intents */
fprintf(stderr,"!!!!!! Warning, USE_CAM is off in xicc.c !!!!!!\n");
#endif
@@ -1927,6 +2009,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 0.0;
gmi->glumbexf = 0.0;
gmi->glumknf = 0.0;
+ gmi->bph = gmm_noBPadpt; /* No BP adapation */
gmi->gamcpf = 0.0;
gmi->gamexf = 0.0;
gmi->gamcknf = 0.0;
@@ -1958,6 +2041,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 0.0;
gmi->glumbexf = 0.0;
gmi->glumknf = 0.0;
+ gmi->bph = gmm_noBPadpt; /* No BP adapation */
gmi->gamcpf = 0.0;
gmi->gamexf = 0.0;
gmi->gamcknf = 0.0;
@@ -1982,6 +2066,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 0.0;
gmi->glumbexf = 0.0;
gmi->glumknf = 0.0;
+ gmi->bph = gmm_noBPadpt; /* No BP adapation */
gmi->gamcpf = 0.0;
gmi->gamexf = 0.0;
gmi->gamcknf = 0.0;
@@ -2008,6 +2093,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 0.0; /* No compression at black end */
gmi->glumbexf = 0.0; /* No expansion at black end */
gmi->glumknf = 0.0;
+ gmi->bph = gmm_noBPadpt; /* No BP adapation */
gmi->gamcpf = 0.0;
gmi->gamexf = 0.0;
gmi->gamcknf = 0.0;
@@ -2033,6 +2119,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 1.0; /* Fully compress grey axis at black end */
gmi->glumbexf = 1.0; /* Fully expand grey axis at black end */
gmi->glumknf = 0.0; /* No knee on grey mapping */
+ gmi->bph = gmm_bendBP; /* extent and bend */
gmi->gamcpf = 0.0; /* No gamut compression */
gmi->gamexf = 0.0; /* No gamut expansion */
gmi->gamcknf = 0.0; /* No knee in gamut compress */
@@ -2060,6 +2147,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 1.0; /* Fully compress grey axis at black end */
gmi->glumbexf = 1.0; /* Fully expand grey axis at black end */
gmi->glumknf = 1.0; /* Sigma knee in grey compress/expand */
+ gmi->bph = gmm_bendBP; /* extent and bend */
gmi->gamcpf = 1.0; /* Full gamut compression */
gmi->gamexf = 0.0; /* No gamut expansion */
gmi->gamcknf = 0.8; /* High Sigma knee in gamut compress */
@@ -2073,7 +2161,7 @@ char *as /* Alias string selector, NULL for none */
/* Don't align neutral axes, but perceptually compress out of gamut */
/* and map appearance space Jab to Jab. */
- no = 5;
+ no = 6;
gmi->as = "pa";
gmi->desc = "pa - Perceptual Apperance ";
gmi->icci = icPerceptual;
@@ -2085,6 +2173,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 1.0; /* Fully compress grey axis at black end */
gmi->glumbexf = 1.0; /* Fully expand grey axis at black end */
gmi->glumknf = 1.0; /* Sigma knee in grey compress/expand */
+ gmi->bph = gmm_bendBP; /* extent and bend */
gmi->gamcpf = 1.0; /* Full gamut compression */
gmi->gamexf = 0.0; /* No gamut expansion */
gmi->gamcknf = 0.8; /* High Sigma knee in gamut compress */
@@ -2098,7 +2187,7 @@ char *as /* Alias string selector, NULL for none */
/* Align neutral axes and perceptually map white and black points, */
/* perceptually compress and expand to match gamuts and map Jab to Jab. */
- no = 6;
+ no = 7;
gmi->as = "ms";
gmi->desc = "ms - Saturation";
gmi->icci = icSaturation;
@@ -2110,6 +2199,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 1.0; /* Fully compress grey axis at black end */
gmi->glumbexf = 1.0; /* Fully expand grey axis at black end */
gmi->glumknf = 1.0; /* Sigma knee in grey compress/expand */
+ gmi->bph = gmm_bendBP; /* extent and bend */
gmi->gamcpf = 1.0; /* Full gamut compression */
gmi->gamexf = 1.0; /* Full gamut expansion */
gmi->gamcknf = 1.0; /* High Sigma knee in gamut compress/expand */
@@ -2123,7 +2213,7 @@ char *as /* Alias string selector, NULL for none */
|| (as != NULL && stricmp(as,"s") == 0)) {
/* Same as "ms" but enhance saturation */
- no = 7;
+ no = 8;
gmi->as = "s";
gmi->desc = " s - Enhanced Saturation [ICC Saturation]";
gmi->icci = icSaturation;
@@ -2135,6 +2225,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 1.0; /* Fully compress grey axis at black end */
gmi->glumbexf = 1.0; /* Fully expand grey axis at black end */
gmi->glumknf = 1.0; /* Sigma knee in grey compress/expand */
+ gmi->bph = gmm_bendBP; /* extent and bend */
gmi->gamcpf = 1.0; /* Full gamut compression */
gmi->gamexf = 1.0; /* Full gamut expansion */
gmi->gamcknf = 1.0; /* High sigma knee in gamut compress */
@@ -2147,11 +2238,11 @@ char *as /* Alias string selector, NULL for none */
|| (as != NULL && stricmp(as,"al") == 0)) {
/* Map absolute L*a*b* to L*a*b* and clip out of gamut */
- no = 8;
+ no = 9;
gmi->as = "al";
gmi->desc = "al - Absolute Colorimetric (Lab)";
gmi->icci = icAbsoluteColorimetric;
- gmi->usecas = 0x0; /* Don't use appearance space, use L*a*b* */
+ gmi->usecas = 0x1; /* Don't use appearance space, use abs. L*a*b* */
gmi->usemap = 0; /* Don't use gamut mapping */
gmi->greymf = 0.0;
gmi->glumwcpf = 0.0;
@@ -2159,6 +2250,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 0.0;
gmi->glumbexf = 0.0;
gmi->glumknf = 0.0;
+ gmi->bph = gmm_noBPadpt; /* No BP adapation */
gmi->gamcpf = 0.0;
gmi->gamexf = 0.0;
gmi->gamcknf = 0.0;
@@ -2172,11 +2264,11 @@ char *as /* Alias string selector, NULL for none */
/* Align neutral axes and linearly map white point, then */
/* map L*a*b* to L*a*b* and clip out of gamut */
- no = 3;
+ no = 10;
gmi->as = "rl";
- gmi->desc = "rl - White Point Matched Appearance (Lab)";
+ gmi->desc = "rl - White Point Matched Colorimetric (Lab)";
gmi->icci = icRelativeColorimetric;
- gmi->usecas = 0x0; /* Don't use appearance space, use L*a*b* */
+ gmi->usecas = 0x0; /* Don't use appearance space, use relative L*a*b* */
gmi->usemap = 1; /* Use gamut mapping */
gmi->greymf = 1.0; /* And linearly map white point */
gmi->glumwcpf = 1.0;
@@ -2184,6 +2276,7 @@ char *as /* Alias string selector, NULL for none */
gmi->glumbcpf = 0.0;
gmi->glumbexf = 0.0;
gmi->glumknf = 0.0;
+ gmi->bph = gmm_noBPadpt; /* No BP adapation */
gmi->gamcpf = 0.0;
gmi->gamexf = 0.0;
gmi->gamcknf = 0.0;
@@ -2210,10 +2303,12 @@ icxGMappingIntent *gmi /* Gamut Mapping parameters to return */
printf(" Closest ICC intent = '%s'\n",icm2str(icmRenderingIntent,gmi->icci));
if ((gmi->usecas & 0xff) == 0)
- printf(" Not using Color Apperance Space\n");
+ printf(" Not using Color Apperance Space - using L*a*b*\n");
else if ((gmi->usecas & 0xff) == 1)
- printf(" Using Color Apperance Space\n");
+ printf(" Not using Color Apperance Space - using Absoute L*a*b*\n");
else if ((gmi->usecas & 0xff) == 2)
+ printf(" Using Color Apperance Space\n");
+ else if ((gmi->usecas & 0xff) == 3)
printf(" Using Absolute Color Apperance Space\n");
if ((gmi->usecas & 0x100) != 0)
@@ -2229,6 +2324,13 @@ icxGMappingIntent *gmi /* Gamut Mapping parameters to return */
printf(" Grey axis black compression factor %f\n", gmi->glumbcpf);
printf(" Grey axis black expansion factor %f\n", gmi->glumbexf);
printf(" Grey axis knee factor %f\n", gmi->glumknf);
+ printf(" Black point algorithm: ");
+ switch(gmi->bph) {
+ case gmm_clipBP: printf("Neutral axis no-adapt extend and clip\n"); break;
+ case gmm_BPadpt: printf("Neutral axis fully adapt\n"); break;
+ case gmm_bendBP: printf("Neutral axis no-adapt extend and bend\n"); break;
+ case gmm_noBPadpt: printf("Neutral axis no-adapt\n"); break;
+ }
printf(" Gamut compression factor %f\n", gmi->gamcpf);
printf(" Gamut expansion factor %f\n", gmi->gamexf);
printf(" Gamut compression knee factor %f\n", gmi->gamcknf);
@@ -3581,6 +3683,164 @@ void icxdpdiMulBy3x3Parm(
out[2] = ov[2];
}
+/* ------------------------------------------- */
+/* BT.1886 support */
+
+/* Compute technical gamma from effective gamma in BT.1886 style */
+
+/* Info for optimization */
+typedef struct {
+ double thyr; /* 50% input target */
+ double roo; /* 0% input target */
+} gam_fits;
+
+/* gamma + input offset function handed to powell() */
+static double gam_fit(void *dd, double *v) {
+ gam_fits *gf = (gam_fits *)dd;
+ double gamma = v[0];
+ double a, b;
+ double rv = 0.0;
+ double tt;
+
+ if (gamma < 0.0) {
+ rv += 100.0 * -gamma;
+ gamma = 1e-4;
+ }
+
+ tt = pow(gf->roo, 1.0/gamma);
+ b = tt/(1.0 - tt); /* Offset */
+ a = pow(1.0 - tt, gamma); /* Gain */
+
+ tt = a * pow((0.5 + b), gamma);
+ tt = tt - gf->thyr;
+ rv += tt * tt;
+
+ return rv;
+}
+
+/* Given the effective gamma and the output offset Y, */
+/* return the technical gamma needed for the correct 50% response. */
+double xicc_tech_gamma(
+ double egamma, /* effective gamma needed */
+ double off /* Output offset required */
+) {
+ gam_fits gf;
+ double op[1], sa[1], rv;
+
+ if (off <= 0.0) {
+ return egamma;
+ }
+
+ gf.thyr = pow(0.5, egamma); /* Advetised 50% target */
+ gf.roo = off;
+
+ op[0] = egamma;
+ sa[0] = 0.1;
+
+ if (powell(&rv, 1, op, sa, 1e-6, 500, gam_fit, (void *)&gf, NULL, NULL) != 0)
+ warning("Computing effective gamma and input offset is inaccurate");
+
+ return op[0];
+}
+
+
+/* Set the bt1886_info to a default do nothing state */
+void bt1886_setnop(bt1886_info *p) {
+ p->ingo = 0.0;
+ p->outsc = 1.0;
+ p->outL = 0.0;
+ p->tab[0] = 0.0;
+ p->tab[1] = 0.0;
+}
+
+/* Setup the bt1886_info for the given target */
+void bt1886_setup(bt1886_info *p, double *XYZbp, double gamma) {
+ double Lab[3], bkipow;
+ p->gamma = gamma;
+
+ icmXYZ2Lab(&icmD50, Lab, XYZbp);
+
+ p->outL = Lab[0]; /* For bp blend */
+ p->tab[0] = Lab[1]; /* a* b* correction needed */
+ p->tab[1] = Lab[2];
+
+ bkipow = pow(XYZbp[1], 1.0/p->gamma);
+ p->ingo = bkipow/(1.0 - bkipow); /* non-linear Y that makes out black point */
+ p->outsc = pow(1.0 - bkipow, p->gamma); /* Scale to restore 1 -> 1 */
+}
+
+/* Apply BT.1886 black offset and gamma curve to the XYZ out of the input profile. */
+/* Do this in the colorspace defined by the input profile matrix lookup, */
+/* so it will be relative XYZ. We assume that BT.1886 does a Rec709 to gamma */
+/* viewing adjustment, irrespective of the source profile transfer curve. */
+void bt1886_apply(bt1886_info *p, icmLuMatrix *lu, double *out, double *in) {
+ int j;
+ double vv;
+
+#ifdef DEBUG
+ printf("bt1886 XYZ in %f %f %f\n", in[0],in[1],in[2]);
+#endif
+
+ lu->bwd_matrix(lu, out, in);
+
+#ifdef DEBUG
+ printf("bt1886 RGB in %f %f %f\n", out[0],out[1],out[2]);
+#endif
+
+ for (j = 0; j < 3; j++) {
+ vv = out[j];
+
+ /* Convert linear light to Rec709 transfer curve */
+ if (vv < 0.018)
+ vv = 4.5 * vv;
+ else
+ vv = 1.099 * pow(vv, 0.45) - 0.099;
+
+ /* Apply input offset & re-scale, and then gamma of 2.4/custom gamma */
+ vv = vv + p->ingo;
+
+ if (vv > 0.0)
+ vv = p->outsc * pow(vv, p->gamma);
+
+ out[j] = vv;
+ }
+
+ lu->fwd_matrix(lu, out, out);
+
+#ifdef DEBUG
+ printf("bt1886 RGB bt.1886 %f %f %f\n", out[0],out[1],out[2]);
+#endif
+
+ icmXYZ2Lab(&icmD50, out, out);
+
+#ifdef DEBUG
+ printf("bt1886 Lab after Y adj. %f %f %f\n", out[0],out[1],out[2]);
+#endif
+
+ /* Blend ab to required black point offset p->tab[] as L approaches black. */
+ vv = (out[0] - p->outL)/(100.0 - p->outL); /* 0 at bp, 1 at wp */
+ vv = 1.0 - vv;
+
+ if (vv < 0.0)
+ vv = 0.0;
+ else if (vv > 1.0)
+ vv = 1.0;
+ vv = pow(vv, 40.0);
+ out[1] += vv * p->tab[0];
+ out[2] += vv * p->tab[1];
+
+#ifdef DEBUG
+ printf("bt1886 Lab after wp adj. %f %f %f\n", out[0],out[1],out[2]);
+#endif
+
+ icmLab2XYZ(&icmD50, out, out);
+
+#ifdef DEBUG
+ printf("bt1886 XYZ out %f %f %f\n", out[0],out[1],out[2]);
+#endif
+}
+
+/* - - - - - - - - - - */
#undef stricmp
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 11:12:50 +0000