Converting an image to black and white can be a very simple process.
However, when the visual impact of an image fails to transfer with those
simple processes, the need for more complex conversion options increases.
If the conversion method is not done most effectively, contrast and delicate
grey tones can wash out, leaving an image looking muddy or lacking in
adequate tonal range. Black and white conversion methods must honour the
spectral relationships between colours, or the conversion can haphazardly
dilute the overall aesthetic impact of an image.
The history of black and white conversion methods in the digital environment
has continuously inspired great technical controversy. Every guru in the industry
has an opinion supporting a particular conversion method. Unfortunately
for the non-gurus (the rest of us), there are a substantial number of different
conversion methods, and an even greater number of gurus to champion each
method for any number of disparately convincing reasons. So how is a non guru
supposed to evaluate which guru’s method to adopt? And further, why
can’t there be one best conversion method everyone can agree upon?
The answer to both questions is complicated. Although having just one
“best conversion” method would greatly simplify the learning process, all
images are not created alike, and, therefore, all conversion methods cannot
apply unilaterally with the same impact. The reality is that most all conversion
methods can effectively render reasonably pleasing results; the difference
to the user in choosing the “best” conversion method depends on a number
of factors including image content, exposure, contrast, tonality, luminance
as well as time to invest in the conversion process, workflow and one’s level
of familiarity with the tools and software. If one needed to make quick
conversions for an editor or newspaper for example, the “best” method may
be the quickest and simplest one. If one had more time and the intention of
creating a fine art portfolio print, the choice may be a more complex method.
Just as each type of black and white film carried unique and distinguishing
aesthetics, any number of variable factors can affect why one might choose
any particular conversion method. Remember, just as what is good for the
goose is not always good for the gander, your own “best” conversion will be
best for your own unique set of reasons.
