David - I'm a photography nut so I'm interested in what you're doing. I have a flickr site at http://www.flickr.com/photos/photonatic/ . This site has a section for my algorithmically-generated images there (done in J) at http://www.flickr.com/photos/photonatic/sets/72157600280547434/; also have some of these on Picasa at http://picasaweb.google.com/DevonMcC/NiceTiles?feat=directlink .
I haven't done much J manipulation of photos - other than a "flipper" to orient them right-side up - so far but this equalization sounds like it might be helpful for fixing problems with exposure. So please keep us all informed. Thanks, Devon On Mon, Dec 22, 2008 at 12:10 PM, David Vincent-Jones < [email protected]> wrote: > Devon; > > Thanks for your advice ... Chris had advised that attachments would work > if all was below 100k .. apparently not. > > I will try to get my elderly head around this wiki stuff and hopefully > post at some future date again. > > David > > On Fri, 2008-12-19 at 23:28 -0500, Devon McCormick wrote: > > David - attachments get stripped from forum messages. You may want to > put > > them on the J wiki instead. > > > > Regards, > > > > Devon > > > > On Fri, Dec 19, 2008 at 9:07 PM, David Vincent-Jones < > > [email protected]> wrote: > > > > > Raul; > > > > > > (sorry for delayed answer ... had an address issue) > > > > > > Equalization evenly spreads the image luminescence over the > luminescence > > > range. (Not the same as just evenly placing the pixels in the range). > > > The effect is to allow details ,usually in the darker areas, to emerge > > > from the image. Local equalization works its magic within a frame/box > > > which is then moved over the entire image. The effect is to further > > > enhance detail in all segments of the image. > > > > > > When the 'frame' is small the effect is extreme but as the frame is > > > enlarged the effect can be very useful in photography without becoming > > > 'too obvious'. > > > > > > To give an idea of the application I have attached a small pair of test > > > files (heavily compressed). Notice that not only is detail pulled out > of > > > the dark areas but > > > that also the high luminance areas are able to pick up added detail. > The > > > frame in this test is still small (100 x 100) 10% of the image so the > > > effect is rather extreme. > > > > > > David > > > > > > ---------------------------------------------------------------------- > > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > > > > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
