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/* |
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* Calibrate a scanned MacBeth Color Checker Chart |
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* |
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* Produce a .cal file suitable for use with pcomb. |
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* Produce a .cal file suitable for use with pcomb, |
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* or .cwp file suitable for use with pcwarp. |
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* |
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* Warping code depends on conformance of COLOR and W3VEC types. |
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*/ |
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#include <stdio.h> |
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#include <math.h> |
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#ifdef MSDOS |
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#include <fcntl.h> |
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#endif |
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#include "color.h" |
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#include "resolu.h" |
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#include "pmap.h" |
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#include "warp3d.h" |
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|
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/* MacBeth colors */ |
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#define DarkSkin 0 |
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#define RG_CORR 04 /* corrected color region */ |
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|
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int scanning = 1; /* scanned input (or recorded output)? */ |
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double irrad = 1.0; /* irradiance multiplication factor */ |
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int rawmap = 0; /* put out raw color mapping? */ |
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|
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int xmax, ymax; /* input image dimensions */ |
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int bounds[4][2]; /* image coordinates of chart corners */ |
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COLORMAT solmat; /* color mapping matrix */ |
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COLOR colmin, colmax; /* gamut limits */ |
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|
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WARP3D *wcor = NULL; /* color space warp */ |
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|
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FILE *debugfp = NULL; /* debug output picture */ |
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char *progname; |
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|
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bounds[3][1] = atoi(argv[++i]); |
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scanning = 2; |
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break; |
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case 'i': /* irradiance factor */ |
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i++; |
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if (badarg(argc-i, argv+i, "f")) |
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goto userr; |
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irrad = atof(argv[i]); |
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break; |
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case 'm': /* raw map output */ |
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rawmap = 1; |
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break; |
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case 'c': /* color input */ |
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scanning = 0; |
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break; |
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else |
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getcolors(); |
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compute(); /* compute color mapping */ |
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/* print comment */ |
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printf("{\n\tColor correction file computed by:\n\t\t"); |
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printargs(argc, argv, stdout); |
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printf("\n\tUsage: pcomb -f %s uncorrected.pic > corrected.pic\n", |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
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if (!scanning) |
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printf("\t Or: pcond [options] -f %s orig.pic > output.pic\n", |
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if (rawmap) { /* print out raw correspondence */ |
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register int j; |
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|
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printf("# Color correspondence produced by:\n#\t\t"); |
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printargs(argc, argv, stdout); |
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printf("#\tUsage: pcwarp -m %s uncorrected.pic > corrected.pic\n", |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
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printf("}\n"); |
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putmapping(); /* put out color mapping */ |
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printf("#\t Or: pcond [options] -m %s orig.pic > output.pic\n", |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
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for (j = 0; j < 24; j++) |
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printf("%f %f %f %f %f %f\n", |
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colval(inpRGB[j],RED), colval(inpRGB[j],GRN), |
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colval(inpRGB[j],BLU), colval(mbRGB[j],RED), |
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colval(mbRGB[j],GRN), colval(mbRGB[j],BLU)); |
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if (scanning && debugfp != NULL) |
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cwarp(); /* color warp for debugging */ |
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} else { /* print color mapping */ |
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/* print header */ |
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printf("{\n\tColor correction file computed by:\n\t\t"); |
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printargs(argc, argv, stdout); |
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printf("\n\tUsage: pcomb -f %s uncorrected.pic > corrected.pic\n", |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
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if (!scanning) |
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printf("\t Or: pcond [options] -f %s orig.pic > output.pic\n", |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
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printf("}\n"); |
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putmapping(); /* put out color mapping */ |
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} |
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if (debugfp != NULL) /* put out debug picture */ |
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if (scanning) |
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picdebug(); |
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exit(0); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-d dbg.pic][-p xul yul xur yur xll yll xlr ylr] input.pic [output.cal]\n", |
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"Usage: %s [-d dbg.pic][-p xul yul xur yur xll yll xlr ylr][-i irrad][-m] input.pic [output.{cal|cwp}]\n", |
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progname); |
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fprintf(stderr, " or: %s [-d dbg.pic] -c [xyY.dat [output.cal]]\n", |
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fprintf(stderr, " or: %s [-d dbg.pic][-i irrad][-m] -c [xyY.dat [output.{cal|cwp}]]\n", |
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progname); |
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exit(1); |
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} |
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exit(1); |
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} |
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/* map MacBeth colors to RGB space */ |
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for (i = 0; i < 24; i++) |
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for (i = 0; i < 24; i++) { |
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xyY2RGB(mbRGB[i], mbxyY[i]); |
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scalecolor(mbRGB[i], irrad); |
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} |
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} |
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|
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|
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if (scanning) { |
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copycolor(colmin, cblack); |
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copycolor(colmax, cwhite); |
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scalecolor(colmax, irrad); |
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} else |
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for (i = 0; i < 3; i++) { |
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colval(colmin,i) = colval(bramp[0][0],i) - |
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n++; |
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} |
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compsoln(clrin, clrout, n); |
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/* check out-of-gamut colors */ |
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for (i = 0; i < 24; i++) |
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if (cflags & 1L<<i && cvtcolor(ctmp, mbRGB[i])) |
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gmtflags |= 1L<<i; |
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if (irrad > 0.99 && irrad < 1.01) /* check gamut */ |
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for (i = 0; i < 24; i++) |
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if (cflags & 1L<<i && cvtcolor(ctmp, mbRGB[i])) |
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gmtflags |= 1L<<i; |
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} while (cflags & gmtflags); |
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if (gmtflags & MODFLGS) |
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fprintf(stderr, |
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} |
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|
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|
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putmapping() /* put out color mapping for pcomb -f */ |
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putmapping() /* put out color mapping */ |
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{ |
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static char cchar[3] = {'r', 'g', 'b'}; |
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register int i, j; |
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} |
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|
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|
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cwarp() /* compute color warp map */ |
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{ |
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register int i; |
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|
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if ((wcor = new3dw(W3EXACT)) == NULL) |
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goto memerr; |
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for (i = 0; i < 24; i++) |
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if (!add3dpt(wcor, inpRGB[i], mbRGB[i])) |
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goto memerr; |
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return; |
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memerr: |
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perror(progname); |
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exit(1); |
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} |
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|
603 |
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|
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int |
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cvtcolor(cout, cin) /* convert color according to our mapping */ |
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COLOR cout, cin; |
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COLOR ctmp; |
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int clipped; |
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|
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if (scanning) { |
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if (wcor != NULL) { |
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clipped = warp3d(cout, cin, wcor); |
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clipped |= clipgamut(cout,bright(cout),CGAMUT,colmin,colmax); |
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} else if (scanning) { |
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bresp(ctmp, cin); |
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clipped = cresp(cout, ctmp); |
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} else { |
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if (!(1L<<i & gmtflags) || (x+y)&07) { |
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copycolor(scan[x], mbRGB[i]); |
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clipgamut(scan[x], bright(scan[x]), |
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CGAMUT, cblack, cwhite); |
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CGAMUT, colmin, colmax); |
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} else |
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copycolor(scan[x], blkcol); |
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} else if (rg == RG_CORR) |
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clipgamut(ctmp, bright(ctmp), CGAMUT, cblack, cwhite); |
723 |
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setcolr(orclr[i], colval(ctmp,RED), |
724 |
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colval(ctmp,GRN), colval(ctmp,BLU)); |
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bresp(ctmp, inpRGB[i]); |
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colortrans(ct2, solmat, ctmp); |
727 |
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clipgamut(ct2, bright(ct2), CGAMUT, cblack, cwhite); |
728 |
< |
setcolr(cvclr[i], colval(ct2,RED), |
729 |
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colval(ct2,GRN), colval(ct2,BLU)); |
725 |
> |
if (rawmap) |
726 |
> |
copycolr(cvclr[i], mbclr[i]); |
727 |
> |
else { |
728 |
> |
bresp(ctmp, inpRGB[i]); |
729 |
> |
colortrans(ct2, solmat, ctmp); |
730 |
> |
clipgamut(ct2, bright(ct2), CGAMUT, |
731 |
> |
cblack, cwhite); |
732 |
> |
setcolr(cvclr[i], colval(ct2,RED), |
733 |
> |
colval(ct2,GRN), |
734 |
> |
colval(ct2,BLU)); |
735 |
> |
} |
736 |
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} |
737 |
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} |
738 |
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/* allocate scanline */ |