Color Management for Black and White - Black and White in Photoshop CS4 and Photoshop Lightroom - page 23

(3) Discard the embedded proi le (do not color manage). In most instances,
it is best to go ahead and convert everything over to your set working space
in order to simplify and standardize your workl ow, unless of course there is
reason to keep the image in the space in which it was created.
It is important to note that the optimum color space will not always be a
match for what you set in the camera. With midtone heavy and/or overly
saturated Adobe RGB images captured from the D1X and EOS-1D, for
example, assigning the ColorMatch RGB color space often of ers a more
realistic and pleasing color translation with problem images.
Missing proi le
This warning dialog box is not a good one to receive. This means that the
document i le does not have any proi les or translators to convey information
about the color of the image. Photoshop will not know where this i le came
from, nor how to translate its color information accurately. Photoshop can
do a darn good job at guessing, but that is akin to me giving a blank piece of
45 i lm to my students and asking them to shoot the image and process it
in the chemical darkroom without knowing its ISO or i lm type. It would be
fairly dii cult for even a well-seasoned pro to render a good exposure and
development time with virtually no information about the i lm. In this case the
proi le will need to be assigned. If you know that the image came from an sRGB
space, for example, you would i rst assign sRGB, or the known space, and then
convert to the working space. If the incoming source is unknown, assign the
working RGB and move on from there.
How to set: Photoshop color management policies
Setting up your Photoshop color management policies and preferences is
absolutely essential before you begin working in Photoshop. Remember,
these are the settings that specify the handling of color proi les associated
with the RGB, CMYK and Grayscale color modes in every document. This
means that the color management settings af ect how images are displayed
on screen, and how Photoshop operates color separations. These proi les
are known as working spaces. Being aware of your color settings and image