Display utilities Named Window doesn't produce output

[Q3Varnam]

I am trying out FelzenszwalbHuttenlocherSegmenter.

When I do this

                display.addVideoListener(new VideoDisplayListener<MBFImage>() {

                    @Override
                    public void beforeUpdate(MBFImage frame)
                    {
                        DisplayUtilities.display(SegmentationUtilities.renderSegments(320, 240, seg.segment(frame)));
                    }

This results in multiple windows opening for each frame of the segmented image. Hence I tried using the named window code below, so that I get a single segmented window

                DisplayUtilities.createNamedWindow("Background");
                VideoDisplay<MBFImage> display = 
                VideoDisplay.createVideoDisplay(video);
                display.addVideoListener(new VideoDisplayListener<MBFImage>() {

                    @Override
                    public void beforeUpdate(MBFImage frame)
                    {

                                                DisplayUtilities.updateNamed("Background",SegmentationUtilities.renderSegments(320, 240, seg.segment(frame)),"Segmented");


                           }

The named window code is producing only the video window, it doesn't produce the named window, is my usage correct?

Secondly this code takes ages to process a single frame and render it, the CPU is not loaded most of the time, is there anything fundamentally incorrect in the way I am trying to run the segmenter?

[Jonathon Hare]

Just do it like this:

display.addVideoListener(new VideoDisplayListener<MBFImage>() {
    @Override
    public void beforeUpdate(MBFImage frame) {
        DisplayUtilities.displayName(SegmentationUtilities.renderSegments(320, 240, seg.segment(frame)), "Segmented");
    }

[Q3Varnam]

Thanks resolved.