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Luminous fringe at bottom of image RRS feed

  • Question

  •  

    This image was prepared using the HD View plugin for Photoshop, specifying Deep Zoom/Silverligth output: http://www.bstorage.com/Photo/DeepZoom/TwinPeaksNight/zoom.htm .

     

    If you look at the bottom of the image with low magnification, you'll see line of light-colored pixels (fringe). These are not in the large original image. As you zoom, they eventually disappear. I can mask this problem by creating a small border in the viewer (my Silverlight code based on HDView SL) using code or xaml, but it might be worth looking into the root problem.

     

    For comparison, this page (http://www.bstorage.com/Photo/DeepZoom/TwinPeaksNight0/zoom.htm ) used the same original image, but was compiled by the Deep Zoom Composer. I broke the original large file into 3 tiles to keep the DZ Composer from complaining that the file was invalid. Other than that, everything is the same. The version built with the Deep Zoom Composer does not display the fringe problem.

     

    Regards,

    Bill

    Tuesday, October 28, 2008 10:39 PM

All replies

  • Hi Bill,

     

    You've run into a known issue within our tile generation pipeline.  We have a fix for it, but it hasn't been deployed it.  The issue is that for certain size border tiles our temporary storage for the pyramid has a bug.  A work around is to add a few black pixels to the bottom of the image.  I believe that if you make it such that every level of the image (at any scale) has a dimension divisible by two then you won't see this.

     

    We will publish a fix for this sometime in the near future. 

     

    -Matt

    Tuesday, October 28, 2008 11:15 PM