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/* Copyright (c) 1996 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* Condition Radiance picture for display/output |
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*/ |
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|
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#include "pcond.h" |
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|
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#include "random.h" |
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|
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|
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#define LDMAX 100 /* default max. display luminance */ |
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#define LDMINF 0.01 /* default min. display lum. factor */ |
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|
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int what2do = 0; /* desired adjustments */ |
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|
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double ldmax = LDMAX; /* maximum output luminance */ |
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double ldmin = 0.; /* minimum output luminance */ |
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double Bldmin, Bldmax; /* Bl(ldmin) and Bl(ldmax) */ |
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|
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char *progname; /* global argv[0] */ |
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|
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char *infn; /* input file name */ |
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FILE *infp; /* input stream */ |
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VIEW ourview = STDVIEW; /* picture view */ |
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int gotview = 0; /* picture has view */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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RESOLU inpres; /* input picture resolution */ |
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|
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COLOR *fovimg; /* foveal (1 degree) averaged image */ |
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short fvxr, fvyr; /* foveal image resolution */ |
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int bwhist[HISTRES]; /* luminance histogram */ |
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long histot; /* total count of histogram */ |
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double bwmin, bwmax; /* histogram limits */ |
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double bwavg; /* mean brightness */ |
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|
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double scalef = 0.; /* linear scaling factor */ |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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static RGBPRIMS outprimS; |
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int i; |
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#define bool(flg) switch (argv[i][2]) { \ |
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case '\0': what2do ^= flg; break; \ |
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case 'y': case 'Y': case 't': case 'T': \ |
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case '+': case '1': what2do |= flg; break; \ |
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case 'n': case 'N': case 'f': case 'F': \ |
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case '-': case '0': what2do &= ~(flg); break; \ |
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default: goto userr; } |
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|
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progname = argv[0]; |
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|
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'h': |
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bool(DO_HUMAN); |
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break; |
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case 'a': |
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bool(DO_ACUITY); |
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break; |
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case 'v': |
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bool(DO_VEIL); |
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break; |
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case 's': |
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bool(DO_HSENS); |
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break; |
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case 'c': |
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bool(DO_COLOR); |
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break; |
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case 'w': |
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bool(DO_CWEIGHT); |
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break; |
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case 'l': |
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bool(DO_LINEAR); |
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break; |
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case 'p': |
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if (i+8 >= argc) goto userr; |
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outprimS[RED][CIEX] = atof(argv[++i]); |
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outprimS[RED][CIEY] = atof(argv[++i]); |
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outprimS[GRN][CIEX] = atof(argv[++i]); |
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outprimS[GRN][CIEY] = atof(argv[++i]); |
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outprimS[BLU][CIEX] = atof(argv[++i]); |
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outprimS[BLU][CIEY] = atof(argv[++i]); |
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outprimS[WHT][CIEX] = atof(argv[++i]); |
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outprimS[WHT][CIEY] = atof(argv[++i]); |
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outprims = outprimS; |
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break; |
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case 'e': |
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if (i+1 >= argc) goto userr; |
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scalef = atof(argv[++i]); |
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if (argv[i][0] == '+' | argv[i][0] == '-') |
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scalef = pow(2.0, scalef); |
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what2do |= DO_LINEAR; |
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break; |
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case 'f': |
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if (i+1 >= argc) goto userr; |
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mbcalfile = argv[++i]; |
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break; |
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case 't': |
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if (i+1 >= argc) goto userr; |
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ldmax = atof(argv[++i]); |
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if (ldmax <= FTINY) |
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goto userr; |
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break; |
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case 'b': |
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if (i+1 >= argc) goto userr; |
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ldmin = atof(argv[++i]); |
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break; |
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default: |
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goto userr; |
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} |
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if (mbcalfile != NULL & outprims != stdprims) { |
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fprintf(stderr, "%s: only one of -p or -f option supported\n", |
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progname); |
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exit(1); |
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} |
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if (outprims == stdprims & inprims != stdprims) |
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outprims = inprims; |
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if (ldmin <= FTINY) |
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ldmin = ldmax*LDMINF; |
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else if (ldmin >= ldmax) { |
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fprintf(stderr, "%s: Ldmin (%f) >= Ldmax (%f)!\n", progname, |
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ldmin, ldmax); |
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exit(1); |
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} |
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Bldmin = Bl(ldmin); |
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Bldmax = Bl(ldmax); |
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if (i >= argc || i+2 < argc) |
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goto userr; |
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if ((infp = fopen(infn=argv[i], "r")) == NULL) |
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syserror(infn); |
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if (i+2 == argc && freopen(argv[i+1], "w", stdout) == NULL) |
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syserror(argv[i+1]); |
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#ifdef MSDOS |
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setmode(fileno(infp), O_BINARY); |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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getahead(); /* load input header */ |
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printargs(argc, argv, stdout); /* add to output header */ |
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if (outprims != inprims) |
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fputprims(outprims, stdout); |
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mapimage(); /* map the picture */ |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-{h|a|v|s|c|l|w}[+-]][-e ev][-p xr yr xg yg xb yb xw yw|-f mbf.cal][-t Ldmax][-b Ldmin] inpic [outpic]\n", |
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progname); |
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exit(1); |
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#undef bool |
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} |
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|
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|
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syserror(s) /* report system error and exit */ |
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char *s; |
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{ |
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fprintf(stderr, "%s: ", progname); |
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perror(s); |
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exit(2); |
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} |
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|
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|
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headline(s) /* process header line */ |
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char *s; |
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{ |
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static RGBPRIMS inprimS; |
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char fmt[32]; |
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|
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if (formatval(fmt, s)) { /* check if format string */ |
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if (!strcmp(fmt,COLRFMT)) lumf = rgblum; |
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else if (!strcmp(fmt,CIEFMT)) lumf = cielum; |
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else lumf = NULL; |
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return; /* don't echo */ |
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} |
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if (isprims(s)) { /* get input primaries */ |
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primsval(inprimS, s); |
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inprims= inprimS; |
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return; /* don't echo */ |
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} |
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if (isexpos(s)) { /* picture exposure */ |
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inpexp *= exposval(s); |
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return; /* don't echo */ |
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} |
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if (isaspect(s)) /* pixel aspect ratio */ |
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pixaspect *= aspectval(s); |
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if (isview(s)) /* image view */ |
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gotview += sscanview(&ourview, s); |
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fputs(s, stdout); |
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} |
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|
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|
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getahead() /* load picture header */ |
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{ |
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char *err; |
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|
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getheader(infp, headline, NULL); |
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if (lumf == NULL || !fgetsresolu(&inpres, infp)) { |
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fprintf(stderr, "%s: %s: not a Radiance picture\n", |
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progname, infn); |
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exit(1); |
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} |
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if (lumf == rgblum) |
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comprgb2xyzmat(inrgb2xyz, inprims); |
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else if (mbcalfile != NULL) { |
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fprintf(stderr, "%s: macbethcal only works with RGB pictures\n", |
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progname); |
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exit(1); |
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} |
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if (!gotview || ourview.type == VT_PAR) { |
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copystruct(&ourview, &stdview); |
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ourview.type = VT_PER; |
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if (pixaspect*inpres.yr < inpres.xr) { |
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ourview.horiz = 40.0; |
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ourview.vert = 2.*180./PI * |
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atan(.3639702*pixaspect*inpres.yr/inpres.xr); |
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} else { |
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ourview.vert = 40.0; |
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ourview.horiz = 2.*180./PI * |
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atan(.3639702*inpres.xr/pixaspect/inpres.yr); |
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} |
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} |
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if ((err = setview(&ourview)) != NULL) { |
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fprintf(stderr, "%s: view error in picture \"%s\": %s\n", |
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progname, infn, err); |
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exit(1); |
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} |
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} |
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|
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|
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mapimage() /* map picture and send to stdout */ |
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{ |
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COLOR *scan; |
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|
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#ifdef DEBUG |
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fprintf(stderr, "%s: generating histogram...", progname); |
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#endif |
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fovhist(); /* generate adaptation histogram */ |
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#ifdef DEBUG |
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fputs("done\n", stderr); |
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#endif |
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check2do(); /* modify what2do flags */ |
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if (what2do&DO_VEIL) { |
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#ifdef DEBUG |
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fprintf(stderr, "%s: computing veiling...", progname); |
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#endif |
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compveil(); |
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#ifdef DEBUG |
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fputs("done\n", stderr); |
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#endif |
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} |
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#ifdef DEBUG |
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fprintf(stderr, "%s: computing brightness mapping...", progname); |
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#endif |
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if (!(what2do&DO_LINEAR) && mkbrmap() < 0) { /* make tone map */ |
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what2do |= DO_LINEAR; /* use linear scaling */ |
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#ifdef DEBUG |
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fputs("failed!\n", stderr); |
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} else |
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fputs("done\n", stderr); |
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#else |
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} |
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#endif |
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if (what2do&DO_LINEAR) { |
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if (scalef <= FTINY) { |
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if (what2do&DO_HSENS) |
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scalef = htcontrs(Lb(0.5*(Bldmax+Bldmin))) / |
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htcontrs(Lb(bwavg)); |
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else |
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scalef = Lb(0.5*(Bldmax+Bldmin)) / Lb(bwavg); |
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scalef *= WHTEFFICACY/(inpexp*ldmax); |
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} |
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#ifdef DEBUG |
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fprintf(stderr, "%s: linear scaling factor = %f\n", |
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progname, scalef); |
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#endif |
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if (scalef < 0.99 | scalef > 1.01) |
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fputexpos(scalef, stdout); /* write in header */ |
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if (lumf == cielum) scalef /= WHTEFFICACY; |
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} |
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putchar('\n'); /* complete header */ |
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fputsresolu(&inpres, stdout); /* resolution doesn't change */ |
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|
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for (scan = firstscan(); scan != NULL; scan = nextscan()) |
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if (fwritescan(scan, scanlen(&inpres), stdout) < 0) { |
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fprintf(stderr, "%s: scanline write error\n", |
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progname); |
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exit(1); |
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} |
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} |
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|
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|
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double |
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centprob(x, y) /* center-weighting probability function */ |
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int x, y; |
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{ |
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double xr, yr; |
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|
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xr = (x+.5)/fvxr - .5; |
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yr = (y+.5)/fvyr - .5; |
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return(1. - xr*xr - yr*yr); /* radial, == 0.5 at corners */ |
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} |
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|
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|
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fovhist() /* create foveal sampled image and histogram */ |
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{ |
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extern FILE *popen(); |
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char combuf[128]; |
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double l, b, lwmin, lwmax; |
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FILE *fp; |
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int x, y; |
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|
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fvxr = sqrt(ourview.hn2)/FOVDIA + 0.5; |
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if (fvxr < 2) fvxr = 2; |
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fvyr = sqrt(ourview.vn2)/FOVDIA + 0.5; |
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if (fvyr < 2) fvyr = 2; |
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if (!(inpres.or & YMAJOR)) { /* picture is rotated? */ |
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y = fvyr; |
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fvyr = fvxr; |
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fvxr = y; |
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} |
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if ((fovimg = (COLOR *)malloc(fvxr*fvyr*sizeof(COLOR))) == NULL) |
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syserror("malloc"); |
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sprintf(combuf, "pfilt -1 -b -x %d -y %d %s", fvxr, fvyr, infn); |
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if ((fp = popen(combuf, "r")) == NULL) |
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syserror("popen"); |
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getheader(fp, NULL, NULL); /* skip header */ |
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if (fgetresolu(&x, &y, fp) < 0 || x != fvxr | y != fvyr) |
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goto readerr; |
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for (y = 0; y < fvyr; y++) |
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if (freadscan(fovscan(y), fvxr, fp) < 0) |
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goto readerr; |
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pclose(fp); |
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lwmin = 1e10; /* find extrema */ |
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lwmax = 0.; |
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for (y = 0; y < fvyr; y++) |
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for (x = 0; x < fvxr; x++) { |
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l = plum(fovscan(y)[x]); |
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if (l < lwmin) lwmin = l; |
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if (l > lwmax) lwmax = l; |
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} |
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if (lwmin < LMIN) lwmin = LMIN; |
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if (lwmax > LMAX) lwmax = LMAX; |
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/* compute histogram */ |
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bwmin = Bl(lwmin)*(1. - .01/HISTRES); |
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bwmax = Bl(lwmax)*(1. + .01/HISTRES); |
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bwavg = 0.; |
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for (y = 0; y < fvyr; y++) |
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for (x = 0; x < fvxr; x++) { |
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if (what2do & DO_CWEIGHT && |
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frandom() > centprob(x,y)) |
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continue; |
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l = plum(fovscan(y)[x]); |
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b = Bl(l); |
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if (b < bwmin) continue; |
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if (b > bwmax) continue; |
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bwavg += b; |
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bwhc(b)++; |
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histot++; |
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} |
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bwavg /= (double)histot; |
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return; |
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readerr: |
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fprintf(stderr, "%s: error reading from pfilt process in fovimage\n", |
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progname); |
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exit(1); |
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} |
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|
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|
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check2do() /* check histogram to see what isn't worth doing */ |
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{ |
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long sum; |
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double b, l; |
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register int i; |
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|
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/* check for within display range */ |
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if (!(what2do&DO_LINEAR) && Lb(bwmax)/Lb(bwmin) <= ldmax/ldmin) |
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what2do |= DO_LINEAR; |
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|
| 384 |
if (!(what2do & (DO_ACUITY|DO_COLOR|DO_VEIL))) |
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return; |
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/* find 5th percentile */ |
| 387 |
sum = histot*0.05 + .5; |
| 388 |
for (i = 0; i < HISTRES; i++) |
| 389 |
if ((sum -= bwhist[i]) <= 0) |
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break; |
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b = (i+.5)*(bwmax-bwmin)/HISTRES + bwmin; |
| 392 |
l = Lb(b); |
| 393 |
#if 0 |
| 394 |
/* determine if acuity adj. useful */ |
| 395 |
if (what2do&DO_ACUITY && |
| 396 |
hacuity(l) >= (inpres.xr/sqrt(ourview.hn2) + |
| 397 |
inpres.yr/sqrt(ourview.vn2))/(2.*180./PI*2.)) |
| 398 |
what2do &= ~DO_ACUITY; |
| 399 |
#endif |
| 400 |
/* color sensitivity loss? */ |
| 401 |
if (l >= 6.0) |
| 402 |
what2do &= ~DO_COLOR; |
| 403 |
if (!(what2do&DO_VEIL)) |
| 404 |
return; |
| 405 |
/* find 50th percentile (median) */ |
| 406 |
sum = histot*0.50 + .5; |
| 407 |
for (i = 0; i < HISTRES; i++) |
| 408 |
if ((sum -= bwhist[i]) <= 0) |
| 409 |
break; |
| 410 |
/* determine if veiling significant */ |
| 411 |
b = (i+.5)*(bwmax-bwmin)/HISTRES + bwmin; |
| 412 |
if ((b-bwmin)/(bwmax-bwmin) >= 0.70) /* heuristic */ |
| 413 |
what2do &= ~DO_VEIL; |
| 414 |
} |
