Layers in Photoshop are software-implemented vellum (tracing paper), for lack
of any other analog that I can think of. It's like having multiple layers of
paper stacked on top of each other over your main image. But layers can be
transparant, opaque, semi-transparant, act as colored filters, act as
image-altering filters, etc. They can be moved around, hid/shown.
In general they allow editing and manipulation of an image without touching the
original, which can lay at the bottom of the stack of layers.
I'm sure that there's a similar feature in other programs.
Skip
----- Original Message ---------------
Subject: [OM] Re: Shift Lens on E1?/software alternatives
From: hiwayman@xxxxxxx (Walt Wayman)
Date: Tue, 12 Oct 2004 18:07:30 +0000
To: olympus@xxxxxxxxxx
>Jeff referred to this shot yesterday as an example of perspective correction
>with software. I guarantee that the original looks quite different, with a
>lot of falling-over-backwards.
>
>http://www.tope.nl/tope_show_entry.php?event=15&pic=10
>
>I deliberately, just for effect, over-corrected a tiny bit with Picture Window
>Pro, and Jeff was the only one who caught it. Anyway, like Chuck says, you
>can't beat the bang for the buck with PW Pro. Maybe when I outgrow it, if I
>ever do, I'll save up, or sell something, to finance Photoshop.
>
>And what are layers? I thought that was cake.
>
>Walt
>
>--
>"Anything more than 500 yards from
>the car just isn't photogenic." --
>Edward Weston
>
>
>-------------- Original message from Chuck Norcutt : --------------
>
>> Rob said:
>> How about this: Anyone had good results correcting perspective in software?
>> This looks good:
>>
>> Zuiko 24 shift = ~$1400
>> Lens Doc = $99.
>> -------------------------------
>> Or, you could buy Picture Window Pro for the
>> same price (or $10 less if you're willing to do a big download). PW Pro
>> will do all that LensDoc does plus most of what Photoshop does (except
>> layers). Too bad PW Pro functionality isn't available as a plug-in to
>> PhotoShop.
>>
>> Perspective correction in software works well except that you have to
>> keep in mind that you are stretching the image in at least one
>> dimension. This reduces the real resolution and the missing data has to
>> be filled in by interpolation. Whether the result is acceptable depends
>> on the final size of the image.
>>
>> Chuck Norcutt
>>
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