399 MagickExport MagickBooleanType BilevelImage(Image *image,const double threshold,  in BilevelImage()  argument
472         q[i]=(Quantum) (pixel <= threshold ? 0 : QuantumRange);  in BilevelImage()
543     threshold;  in BlackThresholdImage()  local
561   GetPixelInfo(image,&threshold);  in BlackThresholdImage()
563   threshold.red=geometry_info.rho;  in BlackThresholdImage()
564   threshold.green=geometry_info.rho;  in BlackThresholdImage()
565   threshold.blue=geometry_info.rho;  in BlackThresholdImage()
566   threshold.black=geometry_info.rho;  in BlackThresholdImage()
567   threshold.alpha=100.0;  in BlackThresholdImage()
569     threshold.green=geometry_info.sigma;  in BlackThresholdImage()
571     threshold.blue=geometry_info.xi;  in BlackThresholdImage()
573     threshold.alpha=geometry_info.psi;  in BlackThresholdImage()
574   if (threshold.colorspace == CMYKColorspace)  in BlackThresholdImage()
577         threshold.black=geometry_info.psi;  in BlackThresholdImage()
579         threshold.alpha=geometry_info.chi;  in BlackThresholdImage()
583       threshold.red*=(MagickRealType) (QuantumRange/100.0);  in BlackThresholdImage()
584       threshold.green*=(MagickRealType) (QuantumRange/100.0);  in BlackThresholdImage()
585       threshold.blue*=(MagickRealType) (QuantumRange/100.0);  in BlackThresholdImage()
586       threshold.black*=(MagickRealType) (QuantumRange/100.0);  in BlackThresholdImage()
587       threshold.alpha*=(MagickRealType) (QuantumRange/100.0);  in BlackThresholdImage()
637         if (pixel < GetPixelInfoChannel(&threshold,channel))  in BlackThresholdImage()
939     *threshold,  in GetThresholdMapFile()  local
948   for (threshold=GetXMLTreeChild(thresholds,"threshold");  in GetThresholdMapFile()
949        threshold != (XMLTreeInfo *) NULL;  in GetThresholdMapFile()
950        threshold=GetNextXMLTreeTag(threshold))  in GetThresholdMapFile()
952     attribute=GetXMLTreeAttribute(threshold,"map");  in GetThresholdMapFile()
955     attribute=GetXMLTreeAttribute(threshold,"alias");  in GetThresholdMapFile()
959   if (threshold == (XMLTreeInfo *) NULL)  in GetThresholdMapFile()
964   description=GetXMLTreeChild(threshold,"description");  in GetThresholdMapFile()
972   levels=GetXMLTreeChild(threshold,"levels");  in GetThresholdMapFile()
986   attribute=GetXMLTreeAttribute(threshold,"map");  in GetThresholdMapFile()
1135     *threshold,  in ListThresholdMapFile()  local
1148   threshold=GetXMLTreeChild(thresholds,"threshold");  in ListThresholdMapFile()
1149   for ( ; threshold != (XMLTreeInfo *) NULL;  in ListThresholdMapFile()
1150           threshold=GetNextXMLTreeTag(threshold))  in ListThresholdMapFile()
1152     map=GetXMLTreeAttribute(threshold,"map");  in ListThresholdMapFile()
1160     alias=GetXMLTreeAttribute(threshold,"alias");  in ListThresholdMapFile()
1161     description=GetXMLTreeChild(threshold,"description");  in ListThresholdMapFile()
1404           threshold;  in OrderedDitherImage()  local
1412         threshold=(ssize_t) (QuantumScale*q[i]*(levels[n]*(map->divisor-1)+1));  in OrderedDitherImage()
1413         level=threshold/(map->divisor-1);  in OrderedDitherImage()
1414         threshold-=level*(map->divisor-1);  in OrderedDitherImage()
1415         q[i]=ClampToQuantum((double) (level+(threshold >=  in OrderedDitherImage()
1638     threshold;  in RandomThresholdImage()  local
1659   GetPixelInfo(image,&threshold);  in RandomThresholdImage()
1704           threshold;  in RandomThresholdImage()  local
1711           threshold=min_threshold;  in RandomThresholdImage()
1714             threshold=max_threshold;  in RandomThresholdImage()
1716             threshold=(double) (QuantumRange*  in RandomThresholdImage()
1718         q[i]=(double) q[i] <= threshold ? 0 : QuantumRange;  in RandomThresholdImage()
1790     threshold;  in WhiteThresholdImage()  local
1808   GetPixelInfo(image,&threshold);  in WhiteThresholdImage()
1810   threshold.red=geometry_info.rho;  in WhiteThresholdImage()
1811   threshold.green=geometry_info.rho;  in WhiteThresholdImage()
1812   threshold.blue=geometry_info.rho;  in WhiteThresholdImage()
1813   threshold.black=geometry_info.rho;  in WhiteThresholdImage()
1814   threshold.alpha=100.0;  in WhiteThresholdImage()
1816     threshold.green=geometry_info.sigma;  in WhiteThresholdImage()
1818     threshold.blue=geometry_info.xi;  in WhiteThresholdImage()
1820     threshold.alpha=geometry_info.psi;  in WhiteThresholdImage()
1821   if (threshold.colorspace == CMYKColorspace)  in WhiteThresholdImage()
1824         threshold.black=geometry_info.psi;  in WhiteThresholdImage()
1826         threshold.alpha=geometry_info.chi;  in WhiteThresholdImage()
1830       threshold.red*=(MagickRealType) (QuantumRange/100.0);  in WhiteThresholdImage()
1831       threshold.green*=(MagickRealType) (QuantumRange/100.0);  in WhiteThresholdImage()
1832       threshold.blue*=(MagickRealType) (QuantumRange/100.0);  in WhiteThresholdImage()
1833       threshold.black*=(MagickRealType) (QuantumRange/100.0);  in WhiteThresholdImage()
1834       threshold.alpha*=(MagickRealType) (QuantumRange/100.0);  in WhiteThresholdImage()
1884         if (pixel > GetPixelInfoChannel(&threshold,channel))  in WhiteThresholdImage()