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DPChallenge Forums >> Tips, Tricks, and Q&A >> Resize down without jaggies - how?!
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 05/12/2007 04:06:44 PM · #1
Help please. :) Think I'd know how to get a decent result by now, but I have an image I'm trying to resize down that has a strong diagonal line in it. I've tried various layering\blend methods, slight blurring, etc...without a good result.

Any tips on resizing and keeping the jaggies at bay? Please?

Thanks! :)
 05/12/2007 04:08:42 PM · #2
What software and what re-sampling method(s) have you tried?
What if any sharpening has been done so far, and are you cropping or resizing the whole frame? Has it been rotated at all?

Message edited by author 2007-05-12 16:11:25.
 05/12/2007 04:11:18 PM · #3
Originally posted by Brad:
What software and what re-sampling method(s) have you tried?

Paint Shop Pro X and just a straight resize, nothing incremented.

:) :) :)

I need a lightbulb icon here! Your question Brad reminded me I have a software program that I've used for upsizing...haven't tried it to downsize. Let me give that a shot.

THANKS! :D

edit because I can't type today!

Message edited by author 2007-05-12 16:11:42.
 05/12/2007 04:13:23 PM · #4
Sometimes you can get rid of the jaggies by resizing in smaller increments.
 05/12/2007 04:13:40 PM · #5
Very good question as I suspect it affects a lot of us consering vanishing point entries. I'll be watching for tips, too.
 05/12/2007 04:15:01 PM · #6
Quality is an odd thing when resizing. We believe sharper is better, yet often a softer image looks clearer. I've had occasion that in order to get a decent smaller version of an image, I've upsized 1 increment (5% for instance) bicubic smoother, then downsized in 2 steps, bicubic sharper. Repeated until I got to the target size.
If in a challenge that allows spot editing, sharpening halos, either from sharpening or re-sampling (aliasing), can be cloned out using the darker mode. (see my comments on Jon's image here)

Message edited by author 2007-05-12 16:22:57.
 05/12/2007 04:28:12 PM · #7
Usually when you downsize, you use the Bicubic Sharper. However, when there are strong diagnols, Bicubic Sharper gives a very bad case of the jaggies. I have found that using Bicubic Smoother during the downsize with diagnols gives a very nice line. If the rules are not basic, I also take a very small diameter blur tool and run it along the diagnol line and/or right next to it.
 05/12/2007 06:17:08 PM · #8
Ok. The ResizeIT plugin worked just fine for the downsizing (no jaggies). Funny, I hadn't thought of using that tool for anything but upsizing prior to today. :P

Hooray! Another "I learned something new" moment on DPC! :D
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