Difference between Ophthalmic Photography 8 and 16 Bit Image Storage - DICOM

This is a discussion on Difference between Ophthalmic Photography 8 and 16 Bit Image Storage - DICOM ; Does anyone know the difference between the Ophthalmic Photography 8 Bit Image Storage SOP Class (UID 1.2.840.10008.5.1.4.1.1.77.1.5.1), and the Ophthalmic Photography 16 Bit Image Storage SOP Class (UID 1.2.840.10008.5.1.4.1.1.77.1.5.2)?...

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Thread: Difference between Ophthalmic Photography 8 and 16 Bit Image Storage

  1. Difference between Ophthalmic Photography 8 and 16 Bit Image Storage

    Does anyone know the difference between the Ophthalmic Photography 8
    Bit Image Storage SOP Class (UID 1.2.840.10008.5.1.4.1.1.77.1.5.1), and
    the Ophthalmic Photography 16 Bit Image Storage SOP Class (UID
    1.2.840.10008.5.1.4.1.1.77.1.5.2)?


  2. Re: Difference between Ophthalmic Photography 8 and 16 Bit Image Storage

    > Does anyone know the difference between the Ophthalmic Photography 8
    > Bit Image Storage SOP Class (UID 1.2.840.10008.5.1.4.1.1.77.1.5.1), and
    > the Ophthalmic Photography 16 Bit Image Storage SOP Class (UID
    > 1.2.840.10008.5.1.4.1.1.77.1.5.2)?


    I guess the different is 8 bits :-)

    8 bit images have 256 colors or gray levels.
    16 bit images have 65535 colors or gray levels.

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  3. Re: Difference between Ophthalmic Photography 8 and 16 Bit Image Storage

    We actually defined both the 8 bit and 16 bit on purpose. Reason being
    that there are more than 8 bits detectors out there, but we thought
    that an image that has more than 8 bits color would probably break 90%
    of all implementations. So, there is a fall-back of 8 bits to
    facilitate "simplistic" viewers out there. A good practise would be to
    make it configurable at the acquisition device.

    Herman O.

    Francois PIETTE wrote:
    > > Does anyone know the difference between the Ophthalmic Photography 8
    > > Bit Image Storage SOP Class (UID 1.2.840.10008.5.1.4.1.1.77.1.5.1), and
    > > the Ophthalmic Photography 16 Bit Image Storage SOP Class (UID
    > > 1.2.840.10008.5.1.4.1.1.77.1.5.2)?

    >
    > I guess the different is 8 bits :-)
    >
    > 8 bit images have 256 colors or gray levels.
    > 16 bit images have 65535 colors or gray levels.
    >
    > Contribute to the SSL Effort. Visit http://www.overbyte.be/eng/ssl.html
    > --
    > francois.piette@overbyte.be
    > The author for the freeware multi-tier middleware MidWare
    > The author of the freeware Internet Component Suite (ICS)
    > http://www.overbyte.be



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