157 static MagickBooleanType TraceEdges(Image *edge_image,CacheView *edge_view,  in TraceEdges()  argument
205         if (IsAuthenticPixel(edge_image,edge.x+u,edge.y+v) == MagickFalse)  in TraceEdges()
217         if ((GetPixelIntensity(edge_image,q) == 0.0) &&  in TraceEdges()
259     *edge_image;  in CannyEdgeImage()  local
290   edge_image=MorphologyImage(image,ConvolveMorphology,1,kernel_info,exception);  in CannyEdgeImage()
292   if (edge_image == (Image *) NULL)  in CannyEdgeImage()
294   if (TransformImageColorspace(edge_image,GRAYColorspace,exception) == MagickFalse)  in CannyEdgeImage()
296       edge_image=DestroyImage(edge_image);  in CannyEdgeImage()
299   (void) SetImageAlphaChannel(edge_image,OffAlphaChannel,exception);  in CannyEdgeImage()
303   canny_cache=AcquireMatrixInfo(edge_image->columns,edge_image->rows,  in CannyEdgeImage()
307       edge_image=DestroyImage(edge_image);  in CannyEdgeImage()
311   edge_view=AcquireVirtualCacheView(edge_image,exception);  in CannyEdgeImage()
314     magick_number_threads(edge_image,edge_image,edge_image->rows,1)  in CannyEdgeImage()
316   for (y=0; y < (ssize_t) edge_image->rows; y++)  in CannyEdgeImage()
326     p=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns+1,2,  in CannyEdgeImage()
333     for (x=0; x < (ssize_t) edge_image->columns; x++)  in CannyEdgeImage()
374           intensity=GetPixelIntensity(edge_image,kernel_pixels+u);  in CannyEdgeImage()
378         kernel_pixels+=edge_image->columns+1;  in CannyEdgeImage()
411       p+=GetPixelChannels(edge_image);  in CannyEdgeImage()
423   edge_view=AcquireAuthenticCacheView(edge_image,exception);  in CannyEdgeImage()
426     magick_number_threads(edge_image,edge_image,edge_image->rows,1)  in CannyEdgeImage()
428   for (y=0; y < (ssize_t) edge_image->rows; y++)  in CannyEdgeImage()
438     q=GetCacheViewAuthenticPixels(edge_view,0,y,edge_image->columns,1,  in CannyEdgeImage()
445     for (x=0; x < (ssize_t) edge_image->columns; x++)  in CannyEdgeImage()
508       q+=GetPixelChannels(edge_image);  in CannyEdgeImage()
522   edge_view=AcquireAuthenticCacheView(edge_image,exception);  in CannyEdgeImage()
523   for (y=0; y < (ssize_t) edge_image->rows; y++)  in CannyEdgeImage()
530     for (x=0; x < (ssize_t) edge_image->columns; x++)  in CannyEdgeImage()
547       if ((GetPixelIntensity(edge_image,p) == 0.0) &&  in CannyEdgeImage()
549         status=TraceEdges(edge_image,edge_view,canny_cache,x,y,lower_threshold,  in CannyEdgeImage()
571   return(edge_image);  in CannyEdgeImage()