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Photoshop output: scaling

Photoshop output: scaling

2007-10-09 by Richard Smallfield

Hi,
I was wondering if anyone knew whether, when printing via Photoshop, the scale command resamples the image or just changes the ppi?

thanks,
Richard
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Re:Photoshop output: scaling

2007-10-09 by sinwen

To your thinking what does it means to change PPi  and what it means to modify scale ?

[Non-text portions of this message have been removed]

Re: [Digital BW] Re:Photoshop output: scaling

2007-10-09 by Richard Smallfield

At 06:31 AM Wednesday 10/10/2007, you wrote:
>To your thinking what does it means to change PPi and what it means to modify scale ?

Changing the ppi changes the print size (via resolution) but resampling keeps the ppi constant and interpolates - adds or subtracts - pixels.

I would imagine that downsampling would keep the image quality the same as the larger file (made for a larger print version) ... although resharpening might then be ideal if you are downsampling a lot. But, if Photoshop  just ups the ppi, then (as Qimage does) the image may appear slightly sharper than it would if it was downsampled as (to the best of my knowledge) the Epson driver sends an upsampled 740ppi file to the printer from your 300 or 360ppi file.

If the image is resized downward by increasing the ppi that would be preferable in my opinion.

But ... is that what it does?????

thanks,
Richard 
--
http://smallfield.vze.com
http://photos.smallfield.vze.com (Photos web site)
http://warkworth.vze.com/ (Warkworth photo essay)
http://picasaweb.google.com/rsmallfield/ (Recent work) 

   "Our chief want is someone who will inspire us to be what 
   we know we could be."
   --Ralph Waldo Emerson, writer and philosopher (1803-1882)

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