In an effort to prepare digital images that meet industry standards as
well as client expectations with regard to color and consistency, we
have adopted the following standards. When working with digital images,
the RGB space we work in is "Adobe RGB (1998)". To calibrate our
monitors we use Colorvision's SpyderPRO and its accompanying OptiCal software, with a color temperature of 6500K (D65) and gamma of 2.2.
It is important to have your monitor adjusted properly in order to view
our photographs or, for that matter, any website which displays images
for which an effort is made to control color in a consistent, industry
standard manner. (Yes, we realize that color management is still, in
many ways, an elusive thing.) This means setting your monitor, either
with its built-in on-screen controls or through software, so that the
grays are rendered without any color cast and so that you can discern
detail in shadows (at the darkest parts of the charts below) and in
highlights (at the brightest parts of the charts below).
grayscale chart above shows gradations of neutral gray from pure black
to pure white. You should be able to discern differences in each
gradation of gray, with the possible exception of the two or three
darkest levels. There should be no color cast to any of the levels.
This chart is created by changing the RGB colors in lockstep by
increments of 8, e.g., (0,0,0), (8,8,8), (16,16,16), ..., (255, 255,
255). Or you can do it by incrementing the HSB values by about 3 each
step, e.g. (0,0,0), (0,0,3), (0,0,6), ..., (0,0,100).
grayscale chart above, similar to the top one, shows all 256 levels of
neutral gray in a horizontal sweep. Each gradation is a single pixel
above chart shows gradations of gray from 0% (pure black) through 10,
20, 30, 40, 60, 70, 80 and 90% to 100% (pure white). The surrounding
area is 50% gray. The black bar in the center has diagonal stripes of
7% gray -- can you discern them from the pure black in which they are
set? Try reducing the brightness of your monitor so that the stripes
just blend with the black, then raise the brightness one notch -- all
while maintaining the integrity of the pure white.
above color charts are similar to the grayscale chart at the top, which
showed even gradations of neutral gray from darkest (black) to
lightest. These show even gradations of pure red, green and blue. You
should be able to discern each gradation at the bright end. Ideally,
you should also discern each at the dark end, but the darkest several
levels of any one color may blend together.
is another, perhaps useful, color chart. Note that the right hand
extent of each bar shows pure red (top), green (middle), blue (bottom).