126     horizontal_factor,  in ReadYUVImage()  local
155   horizontal_factor=2;  in ReadYUVImage()
166       horizontal_factor=(ssize_t) geometry_info.rho;  in ReadYUVImage()
169         vertical_factor=horizontal_factor;  in ReadYUVImage()
170       if ((horizontal_factor != 1) && (horizontal_factor != 2) &&  in ReadYUVImage()
210     chroma_image=CloneImage(image,(image->columns+horizontal_factor-1)/  in ReadYUVImage()
211       horizontal_factor,(image->rows+vertical_factor-1)/vertical_factor,  in ReadYUVImage()
640     horizontal_factor,  in WriteYUVImage()  local
652   horizontal_factor=2;  in WriteYUVImage()
663       horizontal_factor=(ssize_t) geometry_info.rho;  in WriteYUVImage()
666         vertical_factor=horizontal_factor;  in WriteYUVImage()
667       if ((horizontal_factor != 1) && (horizontal_factor != 2) &&  in WriteYUVImage()
702     width=image->columns+(image->columns & (horizontal_factor-1));  in WriteYUVImage()
714     chroma_image=ResizeImage(image,width/horizontal_factor,  in WriteYUVImage()