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DPChallenge Forums >> Photography Discussion >> image resizing
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 05/26/2008 09:35:18 AM · #1
whats the best way to resize a picture without losing much of its sharpness and quality

the originals are 8.6 x 12.9 inches and i want to convert them to 11 x 16.4

any help is appreciated
05/26/2008 10:29:41 AM · #2
since you're expanding them you can use the photoshop image size tool that will do it for you and I think you select 'bicubic sharpen' or something similar.

Otherwise, Alien Skin do a great plugin for this sort of thing. I think it's called Blowup but don't quote me. It works pretty damned well in my experience- the interpolation method used seems a lot smoother than the one in photoshop.

After you've resized it, I would do a large radius USM, then a smaller one.
 05/26/2008 11:13:06 AM · #3
thanks tez.. will give it a try
05/26/2008 11:38:51 AM · #4
Originally posted by Tez:
since you're expanding them you can use the photoshop image size tool that will do it for you and I think you select 'bicubic sharpen' or something similar.


When enlarging images in Photoshop, "Bicubic Smoother" is the recommended algorithm. "Bicubic Sharper" is recommended for reducing image size.

R.
05/26/2008 11:40:34 AM · #5
i tried Blowup... its really good... thanks Tez
 05/26/2008 12:03:34 PM · #6
Some comparisons of Bicubic vs Blowup vs Genuine Fractals. By no means an exhaustive comparison, but food for thought in any case.

05/26/2008 12:04:11 PM · #7
Originally posted by Bear_Music:
Originally posted by Tez:
since you're expanding them you can use the photoshop image size tool that will do it for you and I think you select 'bicubic sharpen' or something similar.


When enlarging images in Photoshop, "Bicubic Smoother" is the recommended algorithm. "Bicubic Sharper" is recommended for reducing image size.

R.


Thanks Rob, that's actually what I meant. I knew it was 'bicubic' something or other. Thanks for the clarification :)

And rami- no worries:) Happy to help.
 05/26/2008 01:23:38 PM · #8
Originally posted by Tez:
Originally posted by Bear_Music:
Originally posted by Tez:
since you're expanding them you can use the photoshop image size tool that will do it for you and I think you select 'bicubic sharpen' or something similar.


When enlarging images in Photoshop, "Bicubic Smoother" is the recommended algorithm. "Bicubic Sharper" is recommended for reducing image size.

R.


Thanks Rob, that's actually what I meant. I knew it was 'bicubic' something or other. Thanks for the clarification :)

And rami- no worries:) Happy to help.


I figured that :-) Just clarifying...

R.
 05/26/2008 03:18:16 PM · #9
I used to use the Fred Miranda's 3rd party tool called 'Stair Interpolator' for upscaling images when I used PS7.

However, if you have a CS version of Photoshop then 'image resize' using the "bicubic smoother" option works just as well and it is fast. I use CS2 for upscaling images to 20X24 sized fine art prints from a smaller starting size than yours and it works perfect.

For the small amount of upscaling you want to do CS is as good as anything you'll find.
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