is that need permission from author ??

can i use the photo from flickr ?? if i use the photos, is that need permission from author ??

Yes you should ask permission from the author

Yes you should ask permission from the author

ok. thank.

Well it depends on the license type – if you are looking at the creative commons area and you check the license type – can use in commercial, can alter and can distribute then no you do not need permission from the author – just attribution in your help file with a link to the authors stream etc

Well it depends on the license type – if you are looking at the creative commons area and you check the license type – can use in commercial, can alter and can distribute then no you do not need permission from the author – just attribution in your help file with a link to the authors stream etc

Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).

if the licens is attribution, is that can use the photos??

If the work is Creative Commons Attribution License, you should be able to use the photos without permission, as long as you credit the author in your description. For the sake of being friendly, I personally would email the author a link to the file and thank him/her for the photos. Just to show them that their stuff was used and correctly attributed.

This Wiki article explains the CC licenses pretty thoroughly.

http://en.wikipedia.org/wiki/Creative_Commons