Mastering Photoshop Layers by Juergen Gulbins

Author:Juergen Gulbins
Language: eng
Format: epub
Publisher: Rocky Nook
Published: 2013-08-14T16:00:00+00:00

Low-Frequency Sharpening

4. This technique is most often used to sharpen prominent edges and is usually performed using the Unsharp Mask filter (often referred to as USM). To set the opacity and blending mode separately, begin by duplicating the current state of the image.

This time we use a low Radius setting (typically 0.8-1.2 pixels) and a higher Amount setting (100–200%). We recommend starting at 100% to sharpem monitor output. 160–180% is better suited to output on an inkjet printer or for a third-party print service, and 180–220% can be used for printing on matte papers. If you are sharpening for book printing or for printing on highly absorbent paper, you can use even higher values. However, if you have already performed high-frequency sharpening, it is advisable to use a slightly lower Amount value or reduce the Radius setting accordingly. Keep an eye on high-contrast edges because they are particularly prone to sharpening artifacts. Higher Threshold values (around 3–6 levels) help to prevent artifacts in single-color areas and at soft transitions. Set the USM zoom level to between 50% and 100%, and keep an eye on the effect of your changes in the preview image, which should be zoomed to at least 50%.

5. Finally, we select Luminosity blending mode to give us the result shown in figure 4-45 and its layer stack in figure 4-44. The slight increase in edge saturation that sharpening in Normal blending mode produces can provide better results for images with weaker colors.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.