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External
Since: Nov 05, 2007
Posts: 235
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(Msg. 1) Posted: Sat Feb 09, 2008 10:26 pm
Post subject: Lanczos or Bicubic better for upsizing?
Archived from groups: rec>photo>digital (more info?)
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External
Since: Aug 22, 2005
Posts: 292
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(Msg. 2) Posted: Sat Feb 09, 2008 10:26 pm
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
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[A complimentary Cc of this posting was sent to
Alfred Molon
<alfred_molon.TakeThisOut@yahoo.com>], who wrote in article <MPG.221838d7f379063f98b973.TakeThisOut@news.supernews.com>:
> To upsize images from 6-10 MP to 16MP which interpolation method
> delivers better results - Lanczos or Bicubic?
There are many Lanczos' (and I even heard that there are flavors of
bicubic - although I can imagine only 2). Any Lanczos' would be
slower than any bicubic. Which one is better MUST depend on how fuzzy
your image already is; I would expect that in most situations Lanczos'
would beat bicubic...
But I think a lot would depend on WHY you want to upsize... E.g., a
decent printer would know "the best" way to upscale to its native
resolution...
Yours,
Ilya |
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External
Since: Aug 01, 2005
Posts: 189
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(Msg. 3) Posted: Sun Feb 10, 2008 12:22 am
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
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Alfred Molon wrote:
> To upsize images from 6-10 MP to 16MP which interpolation method
> delivers better results - Lanczos or Bicubic?
That is not an especially large interpolation.
I'll bet that you will not be able to see the difference in an 11X14 print.
Bob Williams >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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Since: Nov 05, 2007
Posts: 235
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(Msg. 4) Posted: Sun Feb 10, 2008 12:46 am
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <fol69g$1925$1@agate.berkeley.edu>, Ilya Zakharevich says...
> Any Lanczos' would be
> slower than any bicubic.
That is not a problem.
> Which one is better MUST depend on how fuzzy
> your image already is;
Well, the image has the typical fuzzyness level of an image produced by
a digital camera.
> But I think a lot would depend on WHY you want to upsize...
Some stock agencies insist on receiving images in a resolution of 16MP
(which does not have to be the native resolution, i.e. upsizing is
explicitely allowed).
--
Alfred Molon
------------------------------
Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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External
Since: Nov 04, 2007
Posts: 1328
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(Msg. 5) Posted: Sun Feb 10, 2008 2:50 am
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
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On Sat, 9 Feb 2008 22:26:01 +0100, Alfred Molon <alfred_molon DeleteThis @yahoo.com>
wrote in <MPG.221838d7f379063f98b973 DeleteThis @news.supernews.com>:
>To upsize images from 6-10 MP to 16MP which interpolation method
>delivers better results - Lanczos or Bicubic?
Genuine Fractals
--
Best regards,
John Navas
Panasonic DMC-FZ8 (and several others) >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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Since: Jan 25, 2006
Posts: 364
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(Msg. 6) Posted: Sun Feb 10, 2008 10:47 am
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Alfred Molon wrote:
> To upsize images from 6-10 MP to 16MP which interpolation method
> delivers better results - Lanczos or Bicubic?
From my experience Sinc (Lanczos 3) in Gimp is visibly better than
Bicubic in Photoshop for upscaling. The reverse seems to apply for
downscaling - unless you like to see visible aliasing. >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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Since: Nov 05, 2007
Posts: 235
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(Msg. 7) Posted: Sun Feb 10, 2008 10:47 am
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
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In article <1202593221.933094@ftpsrv1>, frederick says...
> From my experience Sinc (Lanczos 3) in Gimp is visibly better than
> Bicubic in Photoshop for upscaling. The reverse seems to apply for
> downscaling - unless you like to see visible aliasing.
I was thinking of perhaps using the Lanczos filter of the ImageMagick
command line utilities, to upsize images in a batch mode. Do you happen
to know which Lanczos filter ImageMagick uses for upsizing?
--
Alfred Molon
------------------------------
Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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Since: Jan 25, 2006
Posts: 364
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(Msg. 8) Posted: Sun Feb 10, 2008 2:24 pm
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Alfred Molon wrote:
> In article <1202593221.933094@ftpsrv1>, frederick says...
>
>> From my experience Sinc (Lanczos 3) in Gimp is visibly better than
>> Bicubic in Photoshop for upscaling. The reverse seems to apply for
>> downscaling - unless you like to see visible aliasing.
>
> I was thinking of perhaps using the Lanczos filter of the ImageMagick
> command line utilities, to upsize images in a batch mode. Do you happen
> to know which Lanczos filter ImageMagick uses for upsizing?
No sorry - I don't. I guess you should just try it - the end result is
what counts...
I see with ImageMagick that anti-aliasing can be performed when
downsampling with Lanczos. That's a good idea - with Gimp set to use
Lanczos as default interpolation, it would be very handy to have some
anti-aliasing applied automatically when an image is downsampled. >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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Since: Aug 06, 2005
Posts: 80
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(Msg. 9) Posted: Sun Feb 10, 2008 5:53 pm
Post subject: Re: Lanczos or Bicubic better for upsizing? [Login to view extended thread Info.]
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On Sun, 10 Feb 2008 00:44:17 +0100, Alfred Molon wrote:
> In article <1202593221.933094@ftpsrv1>, frederick says...
>
>> From my experience Sinc (Lanczos 3) in Gimp is visibly better than
>> Bicubic in Photoshop for upscaling. The reverse seems to apply for
>> downscaling - unless you like to see visible aliasing.
>
> I was thinking of perhaps using the Lanczos filter of the ImageMagick
> command line utilities, to upsize images in a batch mode. Do you happen
> to know which Lanczos filter ImageMagick uses for upsizing?
I've always been amazed at the results when I accidently click on the
[FullScreen] button versus the [X] button when trying to close down an
ImageMagick display. It'll take a not-so-hot-to-begin-with web cam
image from 640x480 to 1272x995 _and seemingly make the image better at_
_the same time!_
Jonesy >> Stay informed about: Lanczos or Bicubic better for upsizing? |
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