One of Two Actions
Rendering intents do one of two actions, to deal with the
out-of-gamut colors.
They either convert or remove
the out-of-gamut colors.
Conversion
The out-of-gamut colors are converted into reproducible colors.
This conversion process is also called compression.
Typically, the conversion optimizes hue more than saturation and
brightness.
That's because human vision is more sensitive to hue, than it is
to saturation and brightness.
Removal
The out-of-gamut colors are removed, or clipped.
Convert or Remove?
Relative Colorimetric and Perceptual are the most common rendering
intents.
Relative Colorimetric converts the out-of-gamut colors into
colors that are in the color space.
Perceptual removes the out-of-gamut colors.
Try Relative Colorimetric first.
However, if your photograph has many different saturated colors, try
Perceptual.
These rendering intents are descibed in more detail below.
Set the Rendering Intent
To set the rendering intent, do the following in Photoshop
Elements.
1) Go to File > Print, or press Ctrl +
p.
2) Look for the Color Management section.
In earlier versions of Photoshop Elements, you must select Show
More Options.
3) Select the rendering intent in the Rendering Intent box.
More
Relative Colorimetric and Perceptual are described in more detail
below.
| Relative Colorimetric |
Each out-of-gamut color becomes the
last in-gamut color. |
All of the in-gamut colors are left
the same. |
The out-of-gamut colors are changed
to the last in-gamut color. |
1) When there are few colors that
will be out-of-gamut.
2) When there are few areas with
highly saturated colors.
3) May be useful for B&W
|
| Perceptual |
All of the colors, in-gamut and out-of-gamut,
are uniformly compressed.
|
The compression maintains the relationship
between the colors in the file, so the printed photograph looks
the same as the on-screen photograph—overall.
However, on an individual
color level, all of the colors will have changed.
|
#1
In-gamut colors are changed, as well
as out-of-gamut colors are changed.
#2
To move out-of-gamut colors into
the gamut of the output device, the colors are desaturated.
|
1) When many colors will be out-of-gamut.
2) When there are areas with highly
saturated colors.
|
Skip the Two Topics Below?
The next topic, The Other Two Rendering Intents,
discusses two rarely used rendering intents.
Therefore, you may want to skip ahead to the next section,
13 -
Soft Proofing.
The Other Two Rendering Intents
As mentioned, the following rendering intents are rarely used with photographs.
Absolute Colorimetric
The Relative Colorimetric rendering intent hehave slike human
vison.
The Absolute rendering intent doesn't.
Human Vision
Human vision uses the the color of whites in a scene to govern
how the other colors are perceived.
The color of white influences our perception of the other colors.
For example, let's say you're looking at a table.
The room is dark, and the table is illuminated with a track
light.
A track light produces orange-colored light.
The table is covered with a white table cloth, and there's a bouquet of
pink flowers in the center.
You see the table cloth as being white, even though it's
illuminated with orange light.
The pink flowers look pink, even though the orange light has
shifted their color away from pink.
This is called color constancy.
Your brain measures the color of the white cloth, and compensates
for the orange light.
This process is called chromatic adaptation.
Again, this is like the Relative Colorimetric
rendering intent, described above.
When using the this rendering intent, the colors are adjusted
relative to the white of the display (monitor or printer), just
like human vision.
The Absolute Colorimetric rendering intent doesn't change the
colors relative to the white of the display device.
The colors are absolute.
The colors are independent of the color of the white of the
monitor or print.
The white of the source will be the same white in the
destination.
The rendering intent is used for proofing.
For example, let's say you're proofing a photograph that will
appear on the cover of a newspaper magazine.
It's a picture of a bride.
The white of her dress is the white of the magazine-cover paper.
The paper is slightly yellow.
The Absolute Colorimetric rendering intent will preserve this
yellow-white color even though you're printing the photograph on a
paper with a different color of white.
Your Epson glossy print will have a yellow-white color, not its
normal neutral white.
Saturated
The Saturated rendering intent is used for graphics, such as charts.
The goal is to increase or preserve saturation.
The accuracy of the hue is not the goal, as it is in the other
rendering intents.
Out-of-gamut Colors
Out-of-gamut colors are changed to the most saturated in-gamut
color, rather than to the closest in-gamut color.
For example, three different shades of red on a pie chart may be
changed to a single saturated red.
In-gamut Colors
In-gamut colors are changed to more saturated in-gamut colors.
