Many
users requested Qimage's Lanczos and S-Spline
to be added to the same comparison. Below
are the results using the "3.0x full
size action"
3.0x
Full Size
|
Genuine
Fractals v2.0
|
 |
|
|
|
|
Stair
Interpolation (SI)
|
 |
|
|
|
|
QimagePro
Lanczos
|
 |
|
|
|
|
S-Spline
v2.1
|
 |
|
|
|
In
my opinion, Lanczos interpolation
is really
good as well, but you do not need to
purchase QimagePro for this purpose.
Check out
IrfanView.
It is free and has Lanczos interpolation
built-in. If you are looking for my information,
Roger Cavanagh recently posted a review
and comparison tests. Here is the link
to his page. Keep in mind that there
is no one “right” interpolation
method. Their intent is to trick our
eyes
into believing that the pictures have
more detail than actually exists.
Which
one is the best method? My answer is:
it depends. It depends on the amount of
interpolation and the subject. As you
can see from the above examples, the SI
action is clearly the winner for this
subject. Keep in mind that much like Genuine
Fractals, this action works better with
faster systems.
If
you have an old system and not much RAM,
this action may run slow, but it is well
worth the extra time. (The
new v1.1 should work better for slower
systems) The
1.5X, 2.0X, 3.0X, and 4.0X options refer
to the amount of up-sampling (interpolation)
relative to your image size. My intention
was to make this action compatible with
any digital camera. Therefore, I chose
these commonly used increments.My advice
is to choose between the given choices
that closely match your output print size
and then use Photoshop's "image size"
to fine-tune it.
