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/* Copyright (c) 1996 Regents of the University of California */ |
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/* Copyright (c) 1997 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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#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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char *infn; /* input file name */ |
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FILE *infp; /* input stream */ |
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FILE *mapfp = NULL; /* tone-mapping function 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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double fixfrac = 0.; /* histogram share due to fixations */ |
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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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short (*fixlst)[2]; /* fixation history list */ |
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int nfixations; /* number of fixation points */ |
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float bwhist[HISTRES]; /* luminance histogram */ |
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double 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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case 'w': |
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bool(DO_CWEIGHT); |
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break; |
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case 'i': |
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if (i+1 >= argc) goto userr; |
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fixfrac = atof(argv[++i]); |
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if (fixfrac > FTINY) what2do |= DO_FIXHIST; |
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else what2do &= ~DO_FIXHIST; |
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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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if (i+1 >= argc) goto userr; |
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mbcalfile = argv[++i]; |
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break; |
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case 'm': |
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if (i+1 >= argc) goto userr; |
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cwarpfile = 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 (i+1 >= argc) goto userr; |
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ldmin = atof(argv[++i]); |
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break; |
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case 'd': |
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if (i+1 >= argc) goto userr; |
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if ((mapfp = fopen(argv[++i], "w")) == NULL) { |
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fprintf(stderr, |
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"%s: cannot open for writing\n", |
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argv[i]); |
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exit(1); |
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} |
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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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if ((mbcalfile != NULL) + (cwarpfile != NULL) + |
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(outprims != stdprims) > 1) { |
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fprintf(stderr, |
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"%s: only one of -p, -m or -f option supported\n", |
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progname); |
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exit(1); |
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} |
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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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/* open input file */ |
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if ((infp = fopen(infn=argv[i], "r")) == NULL) |
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syserror(infn); |
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/* open output file */ |
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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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#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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if (mbcalfile == NULL & outprims != stdprims) |
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fputprims(outprims, stdout); |
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getfovimg(); /* get foveal sample image */ |
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if (what2do&DO_FIXHIST) /* get fixation history? */ |
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getfixations(stdin); |
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mapimage(); /* map the picture */ |
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if (mapfp != NULL) /* write out basic mapping */ |
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putmapping(mapfp); |
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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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fprintf(stderr, "Usage: %s [-{h|a|v|s|c|l|w}[+-]][-i ffrac][-e ev][-p xr yr xg yg xb yb xw yw|-f mbf.cal|-m rgb.cwp][-t Ldmax][-b Ldmin][-d mapfile] 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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COLOR *scan; |
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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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comphist(); /* generate adaptation histogram */ |
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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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if (what2do&DO_VEIL) |
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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) && mkbrmap() < 0) /* make tone map */ |
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what2do |= DO_LINEAR; /* failed! -- use linear scaling */ |
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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 = 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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fputexpos(inpexp*scalef, stdout); /* record exposure */ |
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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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fputformat(COLRFMT, stdout); /* complete header */ |
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putchar('\n'); |
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fputsresolu(&inpres, stdout); /* resolution doesn't change */ |
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/* condition our image */ |
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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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} |
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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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getfovimg() /* load foveal sampled image */ |
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{ |
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double xr, yr; |
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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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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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/* compute image size */ |
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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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} |
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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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sprintf(combuf, "pfilt -1 -b -pa 0 -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 (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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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 sum; |
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double b, l; |
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register int i; |
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/* check for within display range */ |
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l = Lb(bwmax)/Lb(bwmin); |
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if (l <= ldmax/ldmin) |
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if (bwmax - bwmin <= Bldmax - Bldmin) |
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what2do |= DO_LINEAR; |
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/* determine if veiling significant */ |
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if (l < 100.) /* heuristic */ |
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if (bwmax - bwmin < 4.5) /* heuristic */ |
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what2do &= ~DO_VEIL; |
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if (!(what2do & (DO_ACUITY|DO_COLOR))) |
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return; |
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/* find 5th percentile */ |
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sum = histot*0.05 + .5; |
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sum = histot*0.05; |
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for (i = 0; i < HISTRES; i++) |
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if ((sum -= bwhist[i]) <= 0) |
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break; |