How do RAW image viewing dlls work?

Discussion in 'Digital Photography' started by PrashantP, Oct 30, 2005.

  1. PrashantP

    PrashantP Guest

    I read the other day that the individual pixels in a RAW image only
    contain information for 1 color each. When an image is converted
    (either in camera or on the PC) information from nearby pixels is used
    to interpolate for the other colors.

    I know that my viewing/editing application uses the manufacturer
    supplied .dll for decoding the image - question is does it convert it
    before displaying it on the screen. In other words, in order to
    display RAW images, is there some form of conversion taking place
    before the result is displayed on the screen?

    And if yes, then do they use some "default" settings for this
    conversion?

    Thanks,
    Prashant.
     
    PrashantP, Oct 30, 2005
    #1
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  2. PrashantP

    Bill Hilton Guest

    > Prashant writes
    >
    >I know that my viewing/editing application uses the manufacturer
    >supplied .dll for decoding the image - question is does it convert it
    >before displaying it on the screen. In other words, in order to
    >display RAW images, is there some form of conversion taking place
    >before the result is displayed on the screen?


    Usually a small thumbnail sized jpeg is embedded in the RAW and used to
    display the image on the camera LCD.
     
    Bill Hilton, Oct 30, 2005
    #2
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  3. PrashantP

    Ray Fischer Guest

    PrashantP <> wrote:
    >I read the other day that the individual pixels in a RAW image only
    >contain information for 1 color each. When an image is converted
    >(either in camera or on the PC) information from nearby pixels is used
    >to interpolate for the other colors.


    Correct.

    >I know that my viewing/editing application uses the manufacturer
    >supplied .dll for decoding the image - question is does it convert it
    >before displaying it on the screen. In other words, in order to
    >display RAW images, is there some form of conversion taking place
    >before the result is displayed on the screen?


    Mostr certainly.

    >And if yes, then do they use some "default" settings for this
    >conversion?


    Either the camera will provide default settings or the RAW conversion
    will provide some. For converting to JPEG the software should provide
    options at least for exposure and color balance.

    --
    Ray Fischer
     
    Ray Fischer, Oct 30, 2005
    #3
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