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DPChallenge Forums >> Tips, Tricks, and Q&A >> Help! How stop pixelization when reducing size?
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Showing posts 26 - 37 of 37, (reverse)
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 07/16/2005 12:23:49 PM · #26
IrfanView is also free and does a pretty good job resizing. I mainly use an older version for checking EXIF data, but occassionally use it to make a quick resize with no problems.
 07/16/2005 12:26:22 PM · #27
I have PS Elements 3 so I'll try that and see if there is a difference.
 07/16/2005 12:33:41 PM · #28
Originally posted by jbsmithana:
I have PS Elements 3 so I'll try that and see if there is a difference.

I think it's recommended to use the BiCubic Smoother algorithm for reducing photos.
 07/16/2005 12:37:54 PM · #29
Originally posted by GeneralE:
Originally posted by jbsmithana:
I have PS Elements 3 so I'll try that and see if there is a difference.

I think it's recommended to use the BiCubic Smoother algorithm for reducing photos.

I thought that was for interpolation?
 07/16/2005 12:39:36 PM · #30
OK - I think it is the way I have been resampling. I was mistaken, I used DIP to resize the first time. Here are three different program samples in this order - PSE3, DIP10 and TP7:



PSE3 is clearly the best. I guess I will not use the others for resizing anymore. and General, I'll try Bicubic w/ smoothing.

Message edited by author 2005-07-16 12:41:10.
 07/16/2005 12:44:18 PM · #31
Originally posted by kyebosh:
Originally posted by GeneralE:
Originally posted by jbsmithana:
I have PS Elements 3 so I'll try that and see if there is a difference.

I think it's recommended to use the BiCubic Smoother algorithm for reducing photos.

I thought that was for interpolation?

Both upsizing and downsizing involve interpolation, or creating new pixels with values based on the values of surrounding pixels.

With PSE 3 and PS CS I and 2, I think the recommendation is to use BiCubic Sharper when enlarging and BiCubic Smoother when reducing the image.
 07/16/2005 12:51:28 PM · #32
I just ran PSE3 to resize the 3000x2000 image in one step to 640x424 using Bicubic, Bicubic w/ Sharpening and Bicubic w/ Smoothing.

All around results seemed best with Bicubic. Bicubic w/ smoothing definitely got rid of more pixilation and would be good if you are getting a quite a bit of artifact.

Thanks to all for the help.
 07/16/2005 01:51:35 PM · #33
Originally posted by GeneralE:
Originally posted by kyebosh:
Originally posted by GeneralE:
Originally posted by jbsmithana:
I have PS Elements 3 so I'll try that and see if there is a difference.

I think it's recommended to use the BiCubic Smoother algorithm for reducing photos.

I thought that was for interpolation?

Both upsizing and downsizing involve interpolation, or creating new pixels with values based on the values of surrounding pixels.

With PSE 3 and PS CS I and 2, I think the recommendation is to use BiCubic Sharper when enlarging and BiCubic Smoother when reducing the image.


Actually, I think it's the reverse.

Here's a good article.

//graphicssoft.about.com/cs/photoshop/qt/csresampling.htm

Message edited by author 2005-07-16 13:54:05.
 07/16/2005 03:05:12 PM · #34
Originally posted by bear_music:
In my experience, it helps to do no sharpening until after you have reduced the image size. Also, on highly detailed images if you reduce size 10% at a time pixelization is much less noticeable. Fred Miranda's "Resize Pro" can be bought in camera-specific versions and it supposedly is near-miraculous in downsampling without artifacts. I haven't tried it yet because they only provide it for dSLR parameters. I'll be buying it in the 20D version when my body comes in.

Robt.


It is curious that the Resize Pro recommends that sharpen should be implemented before downsizing files.



Message edited by author 2005-07-16 16:08:36.
 07/16/2005 05:04:42 PM · #35
Originally posted by undieyatch:
Originally posted by bear_music:
In my experience, it helps to do no sharpening until after you have reduced the image size. Also, on highly detailed images if you reduce size 10% at a time pixelization is much less noticeable. Fred Miranda's "Resize Pro" can be bought in camera-specific versions and it supposedly is near-miraculous in downsampling without artifacts. I haven't tried it yet because they only provide it for dSLR parameters. I'll be buying it in the 20D version when my body comes in.

Robt.


It is curious that the Resize Pro recommends that sharpen should be implemented before downsizing files.



Yes, and that's not surprsing because it's a very sophisticated process Resize Pro is using, and it makes sense to sharpen first. It's been my experience, if just using PS to resize (and I don't have CS so I can't say if this is true for bicubic smoother and sharper) that my images display better at 640 pixels if I do the sharpening after I resize them.

Robt.
 07/16/2005 05:44:06 PM · #36
Originally posted by bear_music:
Originally posted by undieyatch:
Originally posted by bear_music:
In my experience, it helps to do no sharpening until after you have reduced the image size. Also, on highly detailed images if you reduce size 10% at a time pixelization is much less noticeable. Fred Miranda's "Resize Pro" can be bought in camera-specific versions and it supposedly is near-miraculous in downsampling without artifacts. I haven't tried it yet because they only provide it for dSLR parameters. I'll be buying it in the 20D version when my body comes in.

Robt.


It is curious that the Resize Pro recommends that sharpen should be implemented before downsizing files.



Yes, and that's not surprsing because it's a very sophisticated process Resize Pro is using, and it makes sense to sharpen first. It's been my experience, if just using PS to resize (and I don't have CS so I can't say if this is true for bicubic smoother and sharper) that my images display better at 640 pixels if I do the sharpening after I resize them.

Robt.


.......................................

My unscientific conclusion between comparisons between CS downsample w/bicubic sharper and FM ResizePro - is that in quality they are very similar, certian files are different though. I would highly recommend ResizePro to those who do not have CS, and less so for those who do.

.........

Sorry, this is undieyatch, am at frostypaws and forgot to log off.

Message edited by author 2005-07-16 17:45:54.
 07/16/2005 05:44:32 PM · #37
Originally posted by kyebosh:
yeah I don't know how to do it either!!! Look at the whiskers on this shot.



Thar be oversharpening artefacts. Any chance you can share the original somehow?
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