flickr上這幾張用ＬＸ3拍得相片是有修過片的嗎？

常常在flickr上看到一些用ＬＸ3拍得相片都非常棒，可是有幾張不知道是不是有修片過
例如下面這幾張

http://www.flickr.com/photos/luca_napoli/4445404139/http://www.flickr.com/photos/luca_napoli/4445404139/

http://www.flickr.com/photos/agnihot/3804697464/http://www.flickr.com/photos/agnihot/3804697464/

http://www.flickr.com/photos/erezfre/4418382383/http://www.flickr.com/photos/erezfre/4418382383/

http://www.flickr.com/photos/che-burashka/4410708560/http://www.flickr.com/photos/che-burashka/4410708560/

http://www.flickr.com/photos/friendlydragon/4454508232/http://www.flickr.com/photos/friendlydragon/4454508232/

請問看得出來有修過片嗎

哪幾張有呢？要怎麼看呢？