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| Resizing software. - Page 1 | |
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| Posted: Fri Apr 4th, 2014 01:52 |
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1st Post |
MaxSouthOz
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I'm not sure if this will work, but here's a shot I've taken after resizing . . . Attachment: iii.jpg (Downloaded 32 times)
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| Posted: Fri Apr 4th, 2014 01:55 |
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2nd Post |
MaxSouthOz
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Nope it's not going to work. The file size is too big for the forum, but it starts out as a beautiful clear, crisp image and then when its resized, it loses clarity as above. FYI, it's a shot of the underneath of my model railway layout. My forum is the same as this one. UlraBB. Intuitively if the image is reduced in size, the clarity shouldn't be affected - or should it?
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| Posted: Fri Apr 4th, 2014 02:32 |
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3rd Post |
jk
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Well it depends on the parameters you use for the resize. With what software and how are you doing the resizing? How big is the original file?
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Fri Apr 4th, 2014 02:41 |
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4th Post |
MaxSouthOz
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Typically 4928 x 3264 6.04 mb, Jonathon. I resize to 800 x 600 400 kb I've been doing some Googling. Apparently the image suffers quality loss no matter whether you up size or down size. Counter-intuitive?
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| Posted: Fri Apr 4th, 2014 02:44 |
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5th Post |
jk
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If you resize to 1024 x 800 or what I do is constrain Long side to 1000 and then resize it then it comes down to a very small size. Here is an image from my Fuji XE1 16MP and the orginal jpg is 13.2Mb so the resulting resized image is 227kb which is 1/60 Attachment: XP1-1-4149aa-pp-web.jpg (Downloaded 30 times)
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Fri Apr 4th, 2014 03:08 |
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6th Post |
MaxSouthOz
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Excellent. So instead of selecting 800 x 600 from the options, I make the long side 1000 and let the software work the rest out?
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| Posted: Fri Apr 4th, 2014 05:11 |
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7th Post |
Eric
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Conventional wisdom would say that you never down or up sample in one go. I have always avocated restricting sampling to no more than 50% in each step. 20mb > 11mb > 5.5mb > 3mb > 1.7mb > 1mb You give the algorithm less of a challenge in deciding what to dump or dither. It might be tedious doing this manually but I have a CS Action that does this sequentially in a few seconds.
____________________ Eric |
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| Posted: Fri Apr 4th, 2014 07:01 |
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8th Post |
MaxSouthOz
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Thanks, Eric. I tried going to 1000 as Jonathon suggested and it made an improvement. I'm going to re-visit it tomorrow and do as you suggested. Is it necessary to save the image between steps - or can I just step it down inside the editing software?
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| Posted: Fri Apr 4th, 2014 07:45 |
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9th Post |
jk
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Eric wrote: Conventional wisdom would say that you never down or up sample in one go. Hmm.. Didnt know that but the logic is good.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Fri Apr 4th, 2014 08:20 |
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10th Post |
richw
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I don't really do much resizing but I do own perfect resize - which one software bought from genuine fractals - meant to be the best.
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| This is topic ID = 932 Current time is 13:40 | Page: 1 2 | |
| Nikon DSLR Forums > The Image Processing and Editing Forums > Software for Image Processing > Resizing software. | Top | |
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