137     *artifact;  in CompareImages()  local
209   artifact=GetImageArtifact(image,"compare:highlight-color");  in CompareImages()
210   if (artifact != (const char *) NULL)  in CompareImages()
211     (void) QueryColorCompliance(artifact,AllCompliance,&highlight,exception);  in CompareImages()
213   artifact=GetImageArtifact(image,"compare:lowlight-color");  in CompareImages()
214   if (artifact != (const char *) NULL)  in CompareImages()
215     (void) QueryColorCompliance(artifact,AllCompliance,&lowlight,exception);  in CompareImages()
217   artifact=GetImageArtifact(image,"compare:masklight-color");  in CompareImages()
218   if (artifact != (const char *) NULL)  in CompareImages()
219     (void) QueryColorCompliance(artifact,AllCompliance,&masklight,exception);  in CompareImages()
1267     *artifact;  in GetPerceptualHashDistortion()  local
1288   artifact=GetImageArtifact(image,"phash:normalize");  in GetPerceptualHashDistortion()
1289   normalize=(artifact == (const char *) NULL) ||  in GetPerceptualHashDistortion()
1290     (IsStringTrue(artifact) == MagickFalse) ? MagickFalse : MagickTrue;  in GetPerceptualHashDistortion()
1371     *artifact;  in GetStructuralSimilarityDistortion()  local
1400   artifact=GetImageArtifact(image,"compare:ssim-radius");  in GetStructuralSimilarityDistortion()
1401   if (artifact != (const char *) NULL)  in GetStructuralSimilarityDistortion()
1402     radius=StringToDouble(artifact,(char **) NULL);  in GetStructuralSimilarityDistortion()
1404   artifact=GetImageArtifact(image,"compare:ssim-sigma");  in GetStructuralSimilarityDistortion()
1405   if (artifact != (const char *) NULL)  in GetStructuralSimilarityDistortion()
1406     sigma=StringToDouble(artifact,(char **) NULL);  in GetStructuralSimilarityDistortion()
1414   artifact=GetImageArtifact(image,"compare:ssim-k1");  in GetStructuralSimilarityDistortion()
1415   if (artifact != (const char *) NULL)  in GetStructuralSimilarityDistortion()
1416     c1=pow(StringToDouble(artifact,(char **) NULL)*SSIML,2.0);  in GetStructuralSimilarityDistortion()
1418   artifact=GetImageArtifact(image,"compare:ssim-k2");  in GetStructuralSimilarityDistortion()
1419   if (artifact != (const char *) NULL)  in GetStructuralSimilarityDistortion()
1420     c2=pow(StringToDouble(artifact,(char **) NULL)*SSIML,2.0);  in GetStructuralSimilarityDistortion()