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DPChallenge Forums >> Photography Discussion >> Keeping sharpness in your when resizing.
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04/12/2007 05:41:55 AM · #1
Can someone please give me some advise on how i can keep the sharpness in my photos when i am resizing for the web. I have noticed that with some photos, especially city night shots, the i'm losing the sharpness of the lights in the building. How can i stop this from happening and could it be due using very basic microsoft tools to edit the photo. Any feed back is much appreciated.
04/12/2007 05:43:52 AM · #2
Normally, after downsizing, a little sharpness is lost. The easiest fix is to just apply a little sharpening after the downsizing.
04/12/2007 09:38:48 AM · #3
Originally posted by Kel73:

How can i stop this from happening and could it be due using very basic microsoft tools to edit the photo. Any feed back is much appreciated.

You may be onto something there ... I have always noticed really poor sharpening and resize/resampling quality from the basic MS photo editors.

I usually wait until after I have downsized a photo before doing any sharpening, so that I don't introduce any unnecessary artifacts that may be exacerbated during the resize. What is the general consensus here? Can you get more accurate sharpening on the smaller image if you do some sharpening at the higher resolution first? ... or is it recommended to sharpen only at the higher resolution since at the lower resolution there are fewer pixels to play with?

Message edited by author 2007-04-12 09:40:55.
04/12/2007 09:41:01 AM · #4
Always sharpen after resizing.
04/12/2007 09:43:35 AM · #5
Hm... Resizing is crap sometimes.

04/12/2007 09:44:58 AM · #6
Tutorial onthis.. mid page is what do do about the softness after resizing
04/12/2007 09:45:10 AM · #7
The way I do it is simple, I apply my sharpening to the photo before resizing, then when I resize I apply the same amount of sharpening to it again, but use the fade command under edit to lower the amount until it looks right. I generally end up in the 25-35% range when I'm done. Works out very well.

MattO
04/12/2007 09:46:30 AM · #8
Originally posted by oscarmeyer:

Hm... Resizing is crap sometimes.

That's really what I was thinking of when I asked my question ... sharpening a downsized photo with fine, contrasting lines in it causes the moire or pixelation, which I don't see if I sharpen and then resize. I guess the answer is probably "it depends on the particular photo."
04/12/2007 10:57:20 AM · #9
Originally posted by Kel73:

Can someone please give me some advise on how i can keep the sharpness in my photos when i am resizing for the web. I have noticed that with some photos, especially city night shots, the i'm losing the sharpness of the lights in the building. How can i stop this from happening and could it be due using very basic microsoft tools to edit the photo. Any feed back is much appreciated.


Which very basic microsoft tools do you refer? The one's in Vista or MS Digital Image Suite/Pro?

Non the less, I found the MS not very resize friendly and if you sharpen the resized image the MS stuff will add filesize that almost always takes you over the 150K limit.

I do use Microsoft Digital Image Pro 10 (which is actually far from basic) but I have never been happy with a resize (jaggies etc).

I do all my editing in DIP but resize with the GIMP using the cubic interpolation (missing for MS stuff) option at resize, and then a light sharpen... they seem to come out pretty good and always under 100k for file size.

Edit: spelling of course

Message edited by author 2007-04-12 10:58:54.
04/12/2007 11:03:32 AM · #10
This is why I have always done final sharpening after it is resized for the specific use.

Be careful of sharpening the large image first, then downsizing and sharpening again..that can sometimes cause more noise and artifacts.

best to sharpen image after the resizing, not before and after.
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