| 1 |
greg |
3.1 |
/* Copyright (c) 1996 Regents of the University of California */
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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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* Condition Radiance picture for display/output
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*/
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#include "pcond.h"
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#include "random.h"
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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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int what2do = 0; /* desired adjustments */
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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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char *progname; /* global argv[0] */
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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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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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double scalef = 0.; /* linear scaling factor */
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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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progname = argv[0];
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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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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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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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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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| 197 |
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getahead() /* load picture header */
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{
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char *err;
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| 201 |
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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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| 210 |
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fprintf(stderr, "%s: macbethcal only works with RGB pictures\n",
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progname);
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| 212 |
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exit(1);
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| 213 |
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}
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| 214 |
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if (!gotview || ourview.type == VT_PAR) {
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| 215 |
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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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| 218 |
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ourview.horiz = 40.0;
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| 219 |
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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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| 222 |
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ourview.vert = 40.0;
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ourview.horiz = 2.*180./PI *
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| 224 |
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atan(.3639702*inpres.xr/pixaspect/inpres.yr);
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| 225 |
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}
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| 226 |
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}
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| 227 |
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if ((err = setview(&ourview)) != NULL) {
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| 228 |
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fprintf(stderr, "%s: view error in picture \"%s\": %s\n",
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| 229 |
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progname, infn, err);
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| 230 |
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exit(1);
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| 231 |
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}
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| 232 |
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}
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| 233 |
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| 234 |
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| 235 |
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mapimage() /* map picture and send to stdout */
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| 236 |
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{
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| 237 |
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COLOR *scan;
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| 238 |
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| 239 |
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#ifdef DEBUG
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| 240 |
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fprintf(stderr, "%s: generating histogram...", progname);
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| 241 |
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#endif
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| 242 |
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fovhist(); /* generate adaptation histogram */
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| 243 |
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#ifdef DEBUG
|
| 244 |
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fputs("done\n", stderr);
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| 245 |
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#endif
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| 246 |
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check2do(); /* modify what2do flags */
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| 247 |
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if (what2do&DO_VEIL) {
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| 248 |
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#ifdef DEBUG
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| 249 |
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fprintf(stderr, "%s: computing veiling...", progname);
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| 250 |
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#endif
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| 251 |
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compveil();
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| 252 |
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#ifdef DEBUG
|
| 253 |
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fputs("done\n", stderr);
|
| 254 |
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#endif
|
| 255 |
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}
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| 256 |
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#ifdef DEBUG
|
| 257 |
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fprintf(stderr, "%s: computing brightness mapping...", progname);
|
| 258 |
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#endif
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| 259 |
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if (!(what2do&DO_LINEAR) && mkbrmap() < 0) { /* make tone map */
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| 260 |
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what2do |= DO_LINEAR; /* use linear scaling */
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| 261 |
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#ifdef DEBUG
|
| 262 |
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fputs("failed!\n", stderr);
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| 263 |
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} else
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| 264 |
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fputs("done\n", stderr);
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| 265 |
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#else
|
| 266 |
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}
|
| 267 |
|
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#endif
|
| 268 |
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if (what2do&DO_LINEAR) {
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| 269 |
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if (scalef <= FTINY) {
|
| 270 |
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if (what2do&DO_HSENS)
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| 271 |
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scalef = htcontrs(Lb(0.5*(Bldmax+Bldmin))) /
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| 272 |
|
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htcontrs(Lb(bwavg));
|
| 273 |
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else
|
| 274 |
|
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scalef = Lb(0.5*(Bldmax+Bldmin)) / Lb(bwavg);
|
| 275 |
|
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scalef *= WHTEFFICACY/(inpexp*ldmax);
|
| 276 |
|
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}
|
| 277 |
|
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#ifdef DEBUG
|
| 278 |
|
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fprintf(stderr, "%s: linear scaling factor = %f\n",
|
| 279 |
|
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progname, scalef);
|
| 280 |
|
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#endif
|
| 281 |
|
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if (scalef < 0.99 | scalef > 1.01)
|
| 282 |
|
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fputexpos(scalef, stdout); /* write in header */
|
| 283 |
|
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if (lumf == cielum) scalef /= WHTEFFICACY;
|
| 284 |
|
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}
|
| 285 |
|
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putchar('\n'); /* complete header */
|
| 286 |
|
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fputsresolu(&inpres, stdout); /* resolution doesn't change */
|
| 287 |
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|
| 288 |
|
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for (scan = firstscan(); scan != NULL; scan = nextscan())
|
| 289 |
|
|
if (fwritescan(scan, scanlen(&inpres), stdout) < 0) {
|
| 290 |
|
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fprintf(stderr, "%s: scanline write error\n",
|
| 291 |
|
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progname);
|
| 292 |
|
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exit(1);
|
| 293 |
|
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}
|
| 294 |
|
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}
|
| 295 |
|
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|
| 296 |
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|
| 297 |
|
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double
|
| 298 |
|
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centprob(x, y) /* center-weighting probability function */
|
| 299 |
|
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int x, y;
|
| 300 |
|
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{
|
| 301 |
|
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double xr, yr;
|
| 302 |
|
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|
| 303 |
|
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xr = (x+.5)/fvxr - .5;
|
| 304 |
|
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yr = (y+.5)/fvyr - .5;
|
| 305 |
|
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return(1. - xr*xr - yr*yr); /* radial, == 0.5 at corners */
|
| 306 |
|
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}
|
| 307 |
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|
| 308 |
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|
| 309 |
|
|
fovhist() /* create foveal sampled image and histogram */
|
| 310 |
|
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{
|
| 311 |
|
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extern FILE *popen();
|
| 312 |
|
|
char combuf[128];
|
| 313 |
|
|
double l, b, lwmin, lwmax;
|
| 314 |
|
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FILE *fp;
|
| 315 |
|
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int x, y;
|
| 316 |
|
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|
| 317 |
|
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fvxr = sqrt(ourview.hn2)/FOVDIA + 0.5;
|
| 318 |
|
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if (fvxr < 2) fvxr = 2;
|
| 319 |
|
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fvyr = sqrt(ourview.vn2)/FOVDIA + 0.5;
|
| 320 |
|
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if (fvyr < 2) fvyr = 2;
|
| 321 |
|
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if (!(inpres.or & YMAJOR)) { /* picture is rotated? */
|
| 322 |
|
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y = fvyr;
|
| 323 |
|
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fvyr = fvxr;
|
| 324 |
|
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fvxr = y;
|
| 325 |
|
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}
|
| 326 |
|
|
if ((fovimg = (COLOR *)malloc(fvxr*fvyr*sizeof(COLOR))) == NULL)
|
| 327 |
|
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syserror("malloc");
|
| 328 |
|
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sprintf(combuf, "pfilt -1 -b -x %d -y %d %s", fvxr, fvyr, infn);
|
| 329 |
|
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if ((fp = popen(combuf, "r")) == NULL)
|
| 330 |
|
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syserror("popen");
|
| 331 |
|
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getheader(fp, NULL, NULL); /* skip header */
|
| 332 |
|
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if (fgetresolu(&x, &y, fp) < 0 || x != fvxr | y != fvyr)
|
| 333 |
|
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goto readerr;
|
| 334 |
|
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for (y = 0; y < fvyr; y++)
|
| 335 |
|
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if (freadscan(fovscan(y), fvxr, fp) < 0)
|
| 336 |
|
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goto readerr;
|
| 337 |
|
|
pclose(fp);
|
| 338 |
|
|
lwmin = 1e10; /* find extrema */
|
| 339 |
|
|
lwmax = 0.;
|
| 340 |
|
|
for (y = 0; y < fvyr; y++)
|
| 341 |
|
|
for (x = 0; x < fvxr; x++) {
|
| 342 |
|
|
l = plum(fovscan(y)[x]);
|
| 343 |
|
|
if (l < lwmin) lwmin = l;
|
| 344 |
|
|
if (l > lwmax) lwmax = l;
|
| 345 |
|
|
}
|
| 346 |
|
|
if (lwmin < LMIN) lwmin = LMIN;
|
| 347 |
|
|
if (lwmax > LMAX) lwmax = LMAX;
|
| 348 |
|
|
/* compute histogram */
|
| 349 |
|
|
bwmin = Bl(lwmin)*(1. - .01/HISTRES);
|
| 350 |
|
|
bwmax = Bl(lwmax)*(1. + .01/HISTRES);
|
| 351 |
|
|
bwavg = 0.;
|
| 352 |
|
|
for (y = 0; y < fvyr; y++)
|
| 353 |
|
|
for (x = 0; x < fvxr; x++) {
|
| 354 |
|
|
if (what2do & DO_CWEIGHT &&
|
| 355 |
|
|
frandom() > centprob(x,y))
|
| 356 |
|
|
continue;
|
| 357 |
|
|
l = plum(fovscan(y)[x]);
|
| 358 |
|
|
b = Bl(l);
|
| 359 |
|
|
if (b < bwmin) continue;
|
| 360 |
|
|
if (b > bwmax) continue;
|
| 361 |
|
|
bwavg += b;
|
| 362 |
|
|
bwhc(b)++;
|
| 363 |
|
|
histot++;
|
| 364 |
|
|
}
|
| 365 |
|
|
bwavg /= (double)histot;
|
| 366 |
|
|
return;
|
| 367 |
|
|
readerr:
|
| 368 |
|
|
fprintf(stderr, "%s: error reading from pfilt process in fovimage\n",
|
| 369 |
|
|
progname);
|
| 370 |
|
|
exit(1);
|
| 371 |
|
|
}
|
| 372 |
|
|
|
| 373 |
|
|
|
| 374 |
|
|
check2do() /* check histogram to see what isn't worth doing */
|
| 375 |
|
|
{
|
| 376 |
|
|
long sum;
|
| 377 |
|
|
double b, l;
|
| 378 |
|
|
register int i;
|
| 379 |
|
|
|
| 380 |
|
|
/* check for within display range */
|
| 381 |
|
|
if (!(what2do&DO_LINEAR) && Lb(bwmax)/Lb(bwmin) <= ldmax/ldmin)
|
| 382 |
|
|
what2do |= DO_LINEAR;
|
| 383 |
|
|
|
| 384 |
|
|
if (!(what2do & (DO_ACUITY|DO_COLOR|DO_VEIL)))
|
| 385 |
|
|
return;
|
| 386 |
|
|
/* find 5th percentile */
|
| 387 |
|
|
sum = histot*0.05 + .5;
|
| 388 |
|
|
for (i = 0; i < HISTRES; i++)
|
| 389 |
|
|
if ((sum -= bwhist[i]) <= 0)
|
| 390 |
|
|
break;
|
| 391 |
|
|
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 |
|
|
}
|
