[css-color-hdr] Update to align color space definitions with those in CSS Color 4

Author: svgeesus

css-color-hdr/Overview.bs

@@ -138,7 +138,7 @@ Predefined color spaces for HDR: {#predefined-HDR}
 		<tr><th>Red chromaticity</th><td>0.708</td><td>0.292</td></tr>
 		<tr><th>Green chromaticity</th><td>0.170</td><td>0.797</td></tr>
 		<tr><th>Blue chromaticity</th><td>0.131</td><td>0.046</td></tr>
-		<tr><th>White chromaticity</th><td>0.3127</td><td>0.3290</td></tr>
+		<tr><th>White chromaticity</th><td colspan="2">[=D65 whitepoint|D65=]</td></tr>
 		<tr><th>Transfer function</th><td colspan="2">Perceptual Quantizer</td></tr>
 		<tr><th>White luminance</th><td colspan="2">203 cd/m²</td></tr>
 		<tr><th>Peak white luminance</th><td colspan="2">10,000 cd/m²</td></tr>
@@ -148,6 +148,10 @@ Predefined color spaces for HDR: {#predefined-HDR}
 			<th>Percentages</th>
 			<td  colspan="2">Allowed for R, G and B</td>
 		</tr>
+		<tr>
+			<th>Percent reference range</th>
+			<td>for R,G,B: 0% = 0.0, 100% = 1.0</td>
+		</tr>
 	</table>
 
 	Issue: from BT.2100 p.3 "Note 3d – For PQ in a non-reference viewing environment, or for HLG (in any viewing environment), the black level should be adjusted using the PLUGE test signal and procedure specified in Recommendation ITU-R BT.814."
@@ -247,7 +251,7 @@ Predefined color spaces for HDR: {#predefined-HDR}
 		<tr><th>Red chromaticity</th><td>0.708</td><td>0.292</td></tr>
 		<tr><th>Green chromaticity</th><td>0.170</td><td>0.797</td></tr>
 		<tr><th>Blue chromaticity</th><td>0.131</td><td>0.046</td></tr>
-		<tr><th>White chromaticity</th><td>0.3127</td><td>0.3290</td></tr>
+		<tr><th>White chromaticity</th><td colspan="2">[=D65 whitepoint|D65=]</td></tr>
 		<tr><th>Transfer function</th><td colspan="2">Hybrid log Gamma</td></tr>
 		<tr><th>White luminance</th></tr><td colspan="2">depends on viewing conditions</td></tr>
 		<tr><th>Peak white luminance</th><td colspan="2">12 times reference white</td></tr>
@@ -257,6 +261,10 @@ Predefined color spaces for HDR: {#predefined-HDR}
 			<th>Percentages</th>
 			<td  colspan="2">Allowed for R, G and B</td>
 		</tr>
+		<tr>
+			<th>Percent reference range</th>
+			<td>for R,G,B: 0% = 0.0, 100% = 1.0</td>
+		</tr>
 	</table>
 
 	Issue: add other examples
@@ -340,7 +348,7 @@ Predefined color spaces for HDR: {#predefined-HDR}
 
 	<table>
 		<thead><td></td><td>x</td><td>y</td></thead>
-		<tr><th>White chromaticity</th><td>0.3127</td><td>0.3290</td></tr>
+		<tr><th>White chromaticity</th><td colspan="2">[=D65 whitepoint|D65=]</td></tr>
 		<tr><th>Transfer function</th><td colspan="2">Perceptual Quantizer</td></tr>
 		<tr><th>Peak white luminance</th><td colspan="2">10,000 cd/m²</td></tr>
 		<tr><th>Black luminance</th><td colspan="2">0.001 cd/m²</td></tr>
@@ -349,9 +357,14 @@ Predefined color spaces for HDR: {#predefined-HDR}
 			<th>Percentages</th>
 			<td  colspan="2">Allowed for Jz, az and bz</td>
 		</tr>
+		<tr>
+			<th>Percent reference range</th>
+			<td>for Jz: 0% = 0.0, 100% = 1.0<br>
+			for az and bz: -100% = -1.0, 100% = 1.0</td>
+		</tr>
 	</table>
 
-	Note that unlike Lab, a D65 whitepoint is used.
+	Note that unlike Lab, a [=D65 whitepoint=] is used.
 	Thus, for most RGB spaces
 	(which also use a D65 whitepoint)
 	no chromatic adaptation step need be performed.
@@ -417,7 +430,7 @@ Converting JzCzHz colors to Jzazbz  colors</h4>
 	It is based on human visual system LMS cone primaries;
 	the Hunt-Pointer-Estevez (HPE) XYZ to LMS transform
 	is used,
-	normalized to a D65 white point.
+	normalized to a [=D65 whitepoint=].
 	A crosstalk matrix is then applied,
 	to reduce the gamut hull concavities of BT.2020 RGB,
 	thus reducing interpolation errors.
@@ -428,7 +441,7 @@ Converting JzCzHz colors to Jzazbz  colors</h4>
 
 	<table>
 		<thead><td></td><td>x</td><td>y</td></thead>
-		<tr><th>White chromaticity</th><td>0.3127</td><td>0.3290</td></tr>
+		<tr><th>White chromaticity</th><td colspan="2">[=D65 whitepoint|D65=]</td></tr>
 		<tr><th>Transfer function</th><td colspan="2">Perceptual Quantizer</td></tr>
 		<tr><th>White luminance</th><td colspan="2">203 cd/m²</td></tr>
 		<tr><th>Peak white luminance</th><td colspan="2">10,000 cd/m²</td></tr>
@@ -438,6 +451,11 @@ Converting JzCzHz colors to Jzazbz  colors</h4>
 			<th>Percentages</th>
 			<td  colspan="2">Allowed for I, Ct and Cp</td>
 		</tr>
+		<tr>
+			<th>Percent reference range</th>
+			<td>for I: 0% = 0.0, 100% = 1.0<br>
+			for Ct and Cp: -100% = -1.0, 100% = 1.0</td>
+		</tr>
 	</table>
 
 	Although [[Rec_BT.2100]] defines IC<sub>T</sub>C<sub>P</sub>
@@ -446,7 +464,7 @@ Converting JzCzHz colors to Jzazbz  colors</h4>
 	and thus, any other color space can also be represented
 	by applying an XYZ to LMS transform.
 
-	Note that unlike Lab, a D65 whitepoint is used.
+	Note that unlike Lab, a [=D65 whitepoint=] is used.
 
 	Also unlike Lab, which has primarily been tested with
 	lower-intensity reflective colors,