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Jaggies When Re-Sizing  
User currently offlineToady From United Kingdom, joined Feb 2001, 724 posts, RR: 0
Posted (11 years 1 day 2 hours ago) and read 1317 times:

I'm plagued by a problem: Often when I re-size an image down to, say, 1024 pixels, the smaller image has loads of jaggies. This is before I've done any sharpening.
Could this be because of a poor original digital image or because of poor re-sizing capability of the editing program, in my case PSP?

Sorry for being a bit vague but I hope someone can help me.
Thanks,
Jon.

6 replies: All unread, jump to last
 
User currently offlineRoyalDutch From United States of America, joined Mar 2001, 917 posts, RR: 3
Reply 1, posted (11 years 1 day 1 hour ago) and read 1263 times:

Are you making sure that the height-width ratio is staying the same? That could do it..and distort the picture some too...could you upload a sample?

User currently offlineWietse From Netherlands, joined Oct 2001, 3809 posts, RR: 56
Reply 2, posted (11 years 1 day 1 hour ago) and read 1259 times:

Select Bi-Cubic resampling (if possible) which is the correct method in PS7

Wietse



Wietse de Graaf
User currently offlineToady From United Kingdom, joined Feb 2001, 724 posts, RR: 0
Reply 3, posted (11 years 1 day 1 hour ago) and read 1257 times:

Yes, I'm maintaining the aspect ratio.

Give me a few minutes and I'll prepare a "before & after" shot and upload it here.


User currently offlineToady From United Kingdom, joined Feb 2001, 724 posts, RR: 0
Reply 4, posted (11 years 1 day 1 hour ago) and read 1261 times:

Wietse: You've done it; that's the answer!! Thank you very much indeed.

As an aside, the options for re-sizing are: Pixel Resize, Smart Resize, Bicubic, Bilinear and Weighted Average.
Have you got any idea what that means??? I'm clueless  Smile


User currently offlineWietse From Netherlands, joined Oct 2001, 3809 posts, RR: 56
Reply 5, posted (11 years 1 day 1 hour ago) and read 1252 times:

no problem  Smile

Its the way your PC calculates the pixel differences and relative changes. All very complicated  Smile Bicubic is the most complex, it takes most things into account creating a good resized image.

Wietse



Wietse de Graaf
User currently offlineToady From United Kingdom, joined Feb 2001, 724 posts, RR: 0
Reply 6, posted (11 years 1 day 1 hour ago) and read 1247 times:

OK, I'll stick with Bicubic Big grin

Thanks again, I really appreciate it!


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