function EnhancedEdgeDetectionHDLViewer(actPixPerLine,actLine,I,J)
persistent viewer1
persistent viewer2
if isempty(viewer1)
viewer1 = vision.DeployableVideoPlayer(...
'Location',[100 200],...
'Size','Custom',...
'CustomSize',[4*actPixPerLine actLine]*.75);
viewer2 = vision.DeployableVideoPlayer(...
'Location',[100 226+actLine*.75],...
'Size','Custom',...
'CustomSize',[2*actPixPerLine actLine]*.75);
end

step(viewer1,I);
step(viewer2,J);