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Came across this today while doing some research–
Thought it might be of value to the folks here.
http://www.biphotoclub.org/DISG%20Archive/2002-08.PDF
Excellent article on how to use Photoshop, Photo-Paint or PSP (or any other image editor which supports layers and channels) to prevent that nasty halo that comes from oversharpening with
Unsharp Mask (or even with some third-party plug-ins I’ve seen) You know, that sort of irradiated glow around the areas of high contrast that makes things look unnatural and digitally processed?
Very Informative and useful. Explains what USM is, what it does, how it works, and offers some alternative techniques such as edge masking, channel masking, and two pass sharpening to get kinder, more realistic results. This is not "newbie fodder" and makes some pretty hefty assumptions about how well you understand channels and masks, but for the intermediate to advanced user of image editing software, it contains some excellent advice and very workable techniques.
While the location and name of your menu command may vary a bit from version to version or application to application, the underlying technique is solid and can be accomplished
in most sophisticated image editors, irrespective of vendor.
The entire archive of their Digital Imaging Special Interest Group White Papers is located at
http://www.biphotoclub.org/disg_archive.htm
I haven’t read them all (LOL) but if the rest are as well-researched and intelligent as this one, this is a link you photographers might very well want to bookmark. These folks take their stuff seriously. You don’t see too many web-based tutorials with scholarly references, footnotes and a bibliography.
JPK
Thought it might be of value to the folks here.
http://www.biphotoclub.org/DISG%20Archive/2002-08.PDF
Excellent article on how to use Photoshop, Photo-Paint or PSP (or any other image editor which supports layers and channels) to prevent that nasty halo that comes from oversharpening with
Unsharp Mask (or even with some third-party plug-ins I’ve seen) You know, that sort of irradiated glow around the areas of high contrast that makes things look unnatural and digitally processed?
Very Informative and useful. Explains what USM is, what it does, how it works, and offers some alternative techniques such as edge masking, channel masking, and two pass sharpening to get kinder, more realistic results. This is not "newbie fodder" and makes some pretty hefty assumptions about how well you understand channels and masks, but for the intermediate to advanced user of image editing software, it contains some excellent advice and very workable techniques.
While the location and name of your menu command may vary a bit from version to version or application to application, the underlying technique is solid and can be accomplished
in most sophisticated image editors, irrespective of vendor.
The entire archive of their Digital Imaging Special Interest Group White Papers is located at
http://www.biphotoclub.org/disg_archive.htm
I haven’t read them all (LOL) but if the rest are as well-researched and intelligent as this one, this is a link you photographers might very well want to bookmark. These folks take their stuff seriously. You don’t see too many web-based tutorials with scholarly references, footnotes and a bibliography.
JPK
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