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Jul 22, 2013 at 1:33 comment added Itai @DavyCrockett - The first it hit me I was looking at Max Lyons' photographs and wondering why they have such a different feel. Online their resolution is low but they are downsampled from large panoramas and they just have this kind of ultra-clean, almost too noise-free look.
Jul 22, 2013 at 1:12 comment added Itai You cannot get back the original data because it is not an reversible transformation. The main point is that the lost pixels are used in order to produce new ones.
Jul 21, 2013 at 22:36 comment added mattdm "Discarding" might be a bit dramatic, but you are losing information which you cannot get back.
Jul 21, 2013 at 22:02 comment added DavyCrockett Okay thanks, I like you answer but I going to leave the question open for a little while and see if anything else comes in that wants to go into more details and examples of changes/improvements that occur.
Jul 21, 2013 at 21:04 comment added Itai It's been a while I worked on those, so not off the top the my head anymore. I see that there is some high-level info at Cambridge in Color and on Wikipedia and even several Stackoverflow questions on the topic though.
Jul 21, 2013 at 20:25 vote accept DavyCrockett
Jul 21, 2013 at 22:02
Jul 21, 2013 at 20:22 comment added DavyCrockett Do you have any information or links about different downsampling techniques?
Jul 21, 2013 at 19:59 history answered Itai CC BY-SA 3.0