Digital Black/White RAW Pictures Question

Discussion in 'Photography' started by josie, Jun 19, 2005.

  1. josie

    josie Guest

    Greetings. I am new to the digital format. I have set my Canon Rebel
    XT to capture B/W RAW images. When I preview them in Photoshop Bridge
    they preview as black and white but when I open them in Camera RAW 3.1
    they open in color. The only way I know of, to get them back to B/W,
    is to desaturate them in Camera RAW but this seems counter intuitive
    since I want to use the full 16 bit information for B/W when I took
    the picture. Can someone steer me in the right direction for
    processing B/W RAW files in Camera RAW?
    Thanks
    Sub
     
    josie, Jun 19, 2005
    #1
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  2. josie

    Scott W Guest

    The short answer is there is now such thing as a B/W raw file on a
    color camera.

    The raw files have values for each of the photo-sites, each photo-site
    has a colored filters in front of it and so the raw file has to be in
    color, it takes some processing to remove this color and get a B/W
    photo. In addition to desaturating the photo you can simply change
    the mode from 16 bit color to 16 bit gray scale. There are a number of
    other ways to convert to B/W, I am sure others will be going into which
    ones they prefer.

    Scott
     
    Scott W, Jun 19, 2005
    #2
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  3. The best way is to take the picture in color, then go into the
    Photoshop channel mixer, individually desaturate the red, green, and
    blue channels, and then remix to get the exact rendition in black and
    white that you want. Far better than using the black and white setting
    on the camera. You can also use partial transparency between black and
    white and color versions to get some interesting effects.
     
    Bruce Coryell, Jun 19, 2005
    #3
  4. josie

    josie Guest

    Thanks for the info. I found that if the picture is taken in B/W jpeg
    mode that the picture remains in B/W mode and can not be converted to
    color. With the RAW files I'll just have to use the channel mixer.
    Thanks again
     
    josie, Jun 21, 2005
    #4
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