-unsharp imagemagick question

[elck]

I'm trying imagemagick to sharpen images after resampling,
and I do get some result.
But I do not quite understand the arguments as I only get slight sharpening or no sharpening at all.
For instance convert -unsharp 5 90 200 2 src.jpg dest.jpg seems to do the same as convet -unsharp 2 2.8 2000 src.jpg dest.jpg
I also tried -sharpen with more or less the same result
Can anyone give an example of a very strong, overly sharpened image please?

 

[sleipnir214]

Is this information on the ImageMagick site not helpful:

http://www.imagemagick.org/script/command-line-options.php?#unsharp

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[elck]

Hi Sleipnir,

The page you show is a bit clearer than the ones I found.
At first it did not make any difference, but now I found out that I should have put this:
convert -unsharp "50x1 100 2" src.jpg dest.jpg
Your page doesn't tell that either.
I think it works now like it is supposed to,
but hard to find out wether or not to put the '+' and '{' and where exactly to put the quotes.

Thanks Sleipnir, I may be getting there