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/* RCSid: $Id: pcond.h,v 3.15 2017/11/30 18:43:05 greg Exp $ */ |
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/* |
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* Header file for picture file conditioning. |
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*/ |
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#ifndef _RAD_PCOND_H_ |
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#define _RAD_PCOND_H_ |
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#include "standard.h" |
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#include "color.h" |
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#include "view.h" |
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#include "paths.h" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#ifndef ADJ_VEIL |
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#define ADJ_VEIL 0 /* adjust veil to preserve contrast? */ |
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#endif |
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#define SWNORM 2.26 /* scotopic/photopic ratio for white */ |
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#define WHTSEFFICACY (SWNORM*WHTEFFICACY) |
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#define BotMesopic 5.62e-3 /* top of scotopic range */ |
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#define TopMesopic 5.62 /* bottom of photopic range */ |
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#define FOVDIA (1.0*PI/180.0) /* foveal diameter (radians) */ |
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#define HISTRES 100 /* histogram resolution */ |
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#define MAXPREHIST 1024 /* maximum precomputed histogram */ |
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#define LMIN 1e-7 /* minimum visible world luminance */ |
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#define LMAX 1e7 /* maximum visible world luminance */ |
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#define Bl(Lw) log(Lw) /* brightness function */ |
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#define Bl1(Lw) (1.0/(Lw)) /* first derivative of Bl(Lw) */ |
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#define Lb(Bw) exp(Bw) /* inverse of brightness function */ |
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#define Lb1(Bw) exp(Bw) /* first derivative of Lb(Bw) */ |
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/* Flags of what to do */ |
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#define DO_ACUITY 01 |
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#define DO_VEIL 02 |
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#define DO_HSENS 04 |
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#define DO_COLOR 010 |
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#define DO_CWEIGHT 020 |
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#define DO_FIXHIST 040 |
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#define DO_PREHIST 0100 |
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#define DO_LINEAR 0200 |
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#define DO_HUMAN (DO_ACUITY|DO_VEIL|DO_HSENS|DO_COLOR) |
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extern int what2do; /* desired adjustments */ |
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extern double ldmax; /* maximum output luminance */ |
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extern double lddyn; /* display dynamic range */ |
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extern double Bldmin, Bldmax; /* Bl(ldmax/lddyn) and Bl(ldmax) */ |
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extern char *progname; /* global argv[0] */ |
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extern char *infn; /* input file name */ |
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extern FILE *infp; /* input stream */ |
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extern double (*lumf)(); /* input luminance function */ |
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extern double inpexp; /* input exposure value */ |
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#define plum(clr) ((*lumf)(clr,0)/inpexp) |
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#define slum(clr) ((*lumf)(clr,1)/inpexp) |
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#define ldmin (ldmax/lddyn) |
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extern COLOR *fovimg; /* foveal (1 degree) averaged image */ |
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extern int fvxr, fvyr; /* foveal image resolution */ |
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extern float *crfimg; /* contrast reduction factors */ |
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#define fovscan(y) (fovimg+(y)*fvxr) |
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#define crfscan(y) (crfimg+(y)*fvxr) |
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extern double fixfrac; /* histogram share due to fixations */ |
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extern short (*fixlst)[2]; /* fixation history list */ |
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extern int nfixations; /* number of fixation points */ |
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extern double bwhist[HISTRES]; /* luminance histogram */ |
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extern double histot; /* total count of histogram */ |
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extern double bwmin, bwmax; /* histogram limits */ |
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extern double bwavg; /* mean brightness */ |
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#define bwhi(B) (int)(HISTRES*((B)-bwmin)/(bwmax-bwmin)) |
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extern RGBPRIMP inprims; /* input primaries */ |
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extern COLORMAT inrgb2xyz; /* convert input RGB to XYZ */ |
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extern RGBPRIMP outprims; /* output primaries */ |
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extern double scalef; /* linear scaling factor */ |
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extern VIEW ourview; /* picture view */ |
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extern double pixaspect; /* pixel aspect ratio */ |
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extern RESOLU inpres; /* input picture resolution */ |
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extern char *mbcalfile; /* macbethcal mapping file */ |
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extern char *cwarpfile; /* color warp mapping file */ |
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/* defined in pcond.c */ |
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extern void syserror(char *s); |
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/* defined in pcond2.c */ |
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extern double rgblum(COLOR clr, int scotopic); /* compute (scotopic) luminance of RGB color */ |
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extern double cielum(COLOR xyz, int scotopic); /* compute (scotopic) luminance of CIE color */ |
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extern COLOR *nextscan(void); /* next processed scanline */ |
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extern COLOR *firstscan(void); /* first processed scanline */ |
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/* defined in pcond3.c */ |
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extern void getfixations(FILE *fp); /* load fixation history list */ |
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extern void gethisto(FILE *fp); /* load precomputed luminance histogram */ |
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extern void comphist(void); /* create foveal sampling histogram */ |
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extern double htcontrs(double La); /* human contrast sens. func. */ |
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extern double clampf(double La); /* histogram clamping function */ |
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extern double crfactor(double La); /* contrast reduction factor */ |
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extern int mkbrmap(void); /* make dynamic range map */ |
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extern void putmapping(FILE *fp); /* put out mapping function */ |
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extern void scotscan(COLOR *scan, int xres); /* apply scotopic color sensitivity loss */ |
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extern void mapscan(COLOR *scan, int xres); /* apply tone mapping operator to scanline */ |
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/* defined in pcond4.c */ |
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extern void compveil(void); /* compute veiling image */ |
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#if ADJ_VEIL |
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extern void adjveil(void); /* adjust veil image */ |
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#endif |
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extern void acuscan(COLOR *scln, int y); /* get acuity-sampled scanline */ |
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extern void addveil(COLOR *sl, int y); /* add veil to scanline */ |
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extern void initacuity(void); /* initialize variable acuity sampling */ |
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extern double hacuity(double La); /* human acuity func. (cycles/deg.) */ |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_PCOND_H_ */ |
