There are three settings for Imagener's Resharp function and knowing something about them can help when you are adjusting your image even in automatice mode. If you look at the main Imagener screen at the "Resharp" section, these 3 functions are Amount, Radius and Threshold.
Amount refers to the intensity of
the resharpening effect. A setting between
100% and 200% will do, depending on the Radius. The bigger
the Radius, the less Amount needed. We've found that a "standard" Amount
setting is 120% however, some images need more than this, and
others less.
Radius refers to the dimension,
in width, of every sample that will be affected by the Resharp part of the function.
Choose a setting between 1 and 1.5, depending on the image
resolution. The higher the resolution of the image, the greater
the setting should be for the Radius value.
Complex images will
optimize with very different settings than images with simpler content.
For example, designate a Radius of 1 for a 200 dpi (dots per
inch) image. Designate a radius of 1.5 for a 300 dpi image.
The more Amount you use, the less Radius is necessary.
Threshold specifies how many numbers
of samples in an image will be sharpened. A setting of 0 will
affect every sample, whereas a setting of 50 will affect almost
none of the samples. Highly detailed images such as line art
require a setting of 3, whereas portraits look best with a
setting of 5 to 9.
It can take a while to come up with the right combination
of settings for an image. That's why many photo software programs
offer some form of sharpening as an option during image capture,
and most commonly this functionality is the industry standard "Unsharp
Mask" functionality only without automatic viewing found in the Imagener product line.
|
