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Old Feb 4, 2010, 6:59 PM   #1
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Default How to downsize and keep quality?

I've been viewing some incredible landscapes on this thread (and elsewhere on Steve's Digicam Forums). What I haven't managed to figure out though, is how do you downsize such large files without losing the quality (and the magic!)? I've experimented, but totally wreck the images in trying to get them back to the required 253.9 KB. Any help most gratefully appreciated.

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Old Feb 4, 2010, 7:51 PM   #2
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what i do is just resize my picture to about 800 on the long end, and then leave the compression at its lowest. then i upload my photos to an external picture host sit like photobucket or whatever, and then just use the insert image button with the URL from the hosting site. that way my picture isn't constrained to the 254kb limit.
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Old Feb 4, 2010, 7:55 PM   #3
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Thanks Hards80. Can I create an album on Steve's Digicam and link to the photo in that? I don't have any online storage for photos at the moment.
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Old Feb 4, 2010, 9:38 PM   #4
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Photobucket and Flickr are free and offer quick links to the URLs.
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Old Feb 5, 2010, 4:13 AM   #5
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Quote:
Originally Posted by onlooker View Post
...how do you downsize such large files without losing the quality (and the magic!)? I've experimented, but totally wreck the images in trying to get them back to the required 253.9 KB. ...
In many instances it's necessary to sharpen images a little when resized.

This emphasises edges slightly to give an optical illusion of sharpness. It needs to be done at the final, resized, pixel size of the version that's going to be uploaded. The degree of sharpening is best adjusted by eye in an image editor, e.g., Paint Shop Pro, Irfanview, etc., etc.

It's important first to resize the original image, then get the sharpening right if necessary, and then, finally, compress the image to a small enough size, without doing any intermediate saves and reloads, to avoid applying compression more than once.

Good luck!
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Old Feb 5, 2010, 4:21 AM   #6
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First I do all my pp on the ORIGINAL image - when the result is OK, I do the resizing... the longest side is 1024 px.

Then, when the image has the "forum size", I do the sharpening (with unsharpening mask in photoshop) - as Alan said, it's REALLY important to do that with the small image!!

Finally, I save the shot and choose the quality in photoshop to get the maximum file size (about 250 kb). This is how I do - and it works (look at my mountain-panorama in the landscape section)

BTW - I think the final sharpening is VERY important to bring out the details in such a small version of the pic!
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Old Feb 5, 2010, 7:04 AM   #7
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Quote:
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Photobucket and Flickr are free and offer quick links to the URLs.
I wouldn't recommend too highly. They are loaded with adverts, junk, and lately, a virus that they can't seem to track down. Picasa Web Album is also free, quick, and easy to use. It interfaces very nicely with Picasa, too.
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Old Feb 5, 2010, 10:51 PM   #8
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Default How to downsize and keep quality?

Thank you everyone for your help!

How does this look ...
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