diff options
Diffstat (limited to 'xicc/cam02.h')
| -rw-r--r-- | xicc/cam02.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/xicc/cam02.h b/xicc/cam02.h index a42e71f..37443d3 100644 --- a/xicc/cam02.h +++ b/xicc/cam02.h @@ -17,7 +17,7 @@ * * This file is based on cam97s3.h by Graeme Gill. * - * Copyright 2004 - 2013 Graeme W. Gill + * Copyright 2004 - 2014 Graeme W. Gill * Please refer to COPYRIGHT file for details. * This material is licenced under the GNU AFFERO GENERAL PUBLIC LICENSE Version 3 :- * see the License.txt file for licencing details. @@ -39,7 +39,8 @@ Surround/Adapting field is the visual field minus the background field, and is what is assumed to be setting the viewers light adaptation level. - Ambient field is the whole surrounding environmental light field. + Ambient field is general illumination from the sun or general lighting, + and is the whole surrounding environmental light field. Illuminating field is the field that illuminates the reflective Scene/Image. It may be the same as the Ambient field or it could @@ -88,7 +89,7 @@ /* Flare is assumed to be stray light from light parts of the */ /* image illuminating dark parts of the image, and is display technology dependent. */ -/* In theory reflective systems have no Flare ? */ +/* In theory reflective systems have little Flare ? */ /* Glare is assumed to be stray ambient light reflecting from the display */ /* surface, dust, or entering the observers eye directly, and as a result */ @@ -138,7 +139,7 @@ struct _cam02 { double Lv, /* Luminance of white in the Viewing/Scene/Image field (cd/m^2) */ /* Ignored if Ev is set */ double Yf, /* Flare as a fraction of the reference white (range 0.0 .. 1.0) */ - double Yg, /* Glare as a fraction of the ambient (range 0.0 .. 1.0) */ + double Yg, /* Glare as a fraction of the adapting/surround (range 0.0 .. 1.0) */ double Gxyz[3], /* The Glare white coordinates (ie. the Ambient color) */ /* If <= 0 will Wxyz will be used. */ int hk /* Flag, NZ to use Helmholtz-Kohlraush effect */ @@ -156,7 +157,7 @@ struct _cam02 { double Wxyz[3]; /* Reference/Adapted White XYZ (Y range 0.0 .. 1.0) */ double Yb; /* Relative Luminance of Background to reference white (Y range 0.0 .. 1.0) */ double Yf; /* Flare as a fraction of the reference white (Y range 0.0 .. 1.0) */ - double Yg; /* Glare as a fraction of the ambient (Y range 0.0 .. 1.0) */ + double Yg; /* Glare as a fraction of the adapting/surround (Y range 0.0 .. 1.0) */ double Gxyz[3]; /* The Glare white coordinates (typically the Ambient color) */ /* Internal parameters */ |