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From: Anonymous <anon@anon.net>
Newsgroups: alt.binaries.pictures.webeweb
Subject: Re: Dark or not?
Date: Sat, 30 May 2009 16:47:34 -0700
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On Sat, 30 May 2009 20:26:23 GMT, "Tatjana"
<Tatjana@DontFall.InLove.WithA.dreamer.org> wrote:
>My dear Anonymous:
>
>On my screen your image looks too clear, like if someone had put a very thin
>see through white paper over it.
>
>It can be result of different monitor/program color calibrations.
>
>Technically, comparing your version with original, I can see some noticeable
>clipping.
>
>Clipping occurs when you edit an image using filters in such a way that the
>edited picture will have less unique colors than the original, loosing
>detail and technical image quality.
>
>For example, if you set an image too lighter, you will burn it, what means
>that some light pixels, that were light blue, yellow, green, or any other
>color will become pure wihte. This is a typical example of clipping, and
>something to avoid when editing an image, because it degrades not only the
>technical image quality (less different colors) as it might also affect the
>visual quality of the image if effects are perceptive to human eye. Also,
>notice that effects of clipping are not reversible. (you can not get the
>original back using oposite filters).
>
>Hope this helps a bit to understand the complexity involved on image
>manipulation :)
>
>all yours, Tatjana
Hi Tatjana!
Yes, I realize this. That was just an example of what hue corrections
can create. It can, for instance, take an overly tanned / dark pic and
bring them back to a less brown condition by upping blue. Or as in
some pic sets seen recently, where all the pics are red in tint, a
simple increase in green will bring back normal flesh tones. Hue,
tint, and saturation are also easily adjusted.
If you get a chance, check out Irfanview. Like I said, it's free, and
allows batch processing. The jpg quality is also easily adjustable. I
stepped on that one pretty seriously because I wanted it to post in 1
part, so Agent wouldn't screw it up.
If you do try irfanview, remember to add the plugin pack, which
enables many more adjustments. It's open source and a lot of people
have added features.
http://www.irfanview.com/
-rain
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