Error in story
A 500% USM is not equal to 10x50%.. its only equal to 4x50%. This is why the 10x50 looks so extreme and so bad.
The math is as follows:
100x50% = 150%
150x50% = 225%
225x50% = 337.5%
337.5x50% = 506.25%
As you can see you get over 500% by the fourth iteration.
Re: Error in story
..and welcome to RetouchPRO.
You're probably quite right, as soon as I can get me some free time I'll look into it.
Re: Sharpening – the true story
Both have simular defects: halo, noise increasing, different sensitivity in different illumination area etc.
ImageSkill-software for Digital Image Processing
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