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Bits Missing From Hubble Photos

  1. Feb 15, 2006 #1
  2. jcsd
  3. Feb 15, 2006 #2

    Hurkyl

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    Maybe there's a bright foreground object there that would ruin the processing of the data?
     
  4. Feb 15, 2006 #3

    chroot

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    The majority of the photos you see from the Hubble Space Telescope, like this one, were taken with the "Wide-Field Planetary Camera 2," which is composed of four independent CCD chips laid out in an array. One of the CCDs has a different optics package to increase its resolution, so, when used together to form a mosaic image, a "stairstep" pattern results. If you look closely at this image, you'll see the slightly different color balance from the "PC" CCD versus the other three, larger, "WFC" CCDs.

    http://en.wikipedia.org/wiki/Wide_Field_and_Planetary_Camera_2

    - Warren
     
  5. Feb 19, 2006 #4
    isnt it obvious...

    alien saucer! and The MAN is covering it up!

    just kidding. :confused:

    Hurkyl explained one reason why this could be.

    The other might be post-processing problems.

    you should be aware that these pictures are slowly layered into colour.

    personally with photoshop ive seen quite a few times problems when i tried this. I would layer the colours and the last steps the colours would over saturate and it would then make it very blurry. so to save the colour picture u need to remove the blur, and by that u need to remove the affecting light source.
     
  6. Feb 19, 2006 #5

    Hurkyl

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    I was speculating. chroot posted the answer already.
     
  7. Feb 19, 2006 #6

    Chronos

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    Chroot is correct. The published photos are mosaic images. The missing pixels are merely gaps in the overlay.
     
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