If I'm resizing for the web, such as on this site, I usually just use the smooth gradient setting you have highlighted and change the resolution to 100 pixels/inch.
I resize mine to 1024 pixels wide for landscape format and 768 high if it is portrait format, I don't use the drop down menu you have shown here.
I also select the quality according to the kb size as I try to keep them under 500kb for camera club competitions, so I don't need to re size again.
@eos30me yep that is the "save as" settings that i always use ... thanks for the other info, i'll give it a go with my next upload :)) thanks heaps :))
The best method may depend on why you really wish to change the image size. Is it merely to have a smaller file size? That 30x45cm, 38meg file is pretty large for the usual web site posting true, but also for consideration are targeted resolution, alternative compression formats and settings that might give good balance depending on your audience.
Oddly, there is absolutely no difference whatsoever in the results from the last three bicubic types. Any of them will do. I just use the one you've highlighted for downsizing. For upsizing, I use Genuine Fractals / Perfect Resize, because bicubic is terrible for upsizing.
On a side note, I haven't yet tested Lightroom 3's resizing, but LR and LR2 both use quick and dirty bilinear resampling. If you have ever used Lightroom to resize, and have lost eyelashes or other details, that's why. I am going to assume LR3 does it the same way. Thankfully I also have Perfect Resize plugin for LR.
if i ever need to upsize, which is very rare, i use psp's "raster - deform tool" on a layer over a large blank canvas ... its the only way i've ever been able to keep "some" quality, and hmm i have used it to downsize in psp also. but really avoiding psp at the moment to push myself to learn new stuff :))
I have photoshop on my Mac and have used Image Size. I can resize. The material above is a bit over my head or are confusing. What, if any, standards are there for vertical and horizontal pixels? And checking the boxes for the 365 project? I've re-read this material several times but some of it doesn't register.
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I also select the quality according to the kb size as I try to keep them under 500kb for camera club competitions, so I don't need to re size again.
thanks btw :)
@marubozo thanks also :)
then save as
http://static.365project.org/1/757264_bfglmnw489_m.jpg
This is what works for me, I still have had some colour saturation issues on this web page alone a few times.
On a side note, I haven't yet tested Lightroom 3's resizing, but LR and LR2 both use quick and dirty bilinear resampling. If you have ever used Lightroom to resize, and have lost eyelashes or other details, that's why. I am going to assume LR3 does it the same way. Thankfully I also have Perfect Resize plugin for LR.
if i ever need to upsize, which is very rare, i use psp's "raster - deform tool" on a layer over a large blank canvas ... its the only way i've ever been able to keep "some" quality, and hmm i have used it to downsize in psp also. but really avoiding psp at the moment to push myself to learn new stuff :))
Then I can just right-click on photos and resize them without needing to open them up. Very quick.