On 28/06/15 01:17, FF wrote: > With the introduction of Canon 50 MP camera moiré can be an issue. > What current modules, if any, can be used to remove it and if so what’s the > best strategy?
Disclaimer: I am an electronic engineer used to teach that you _never_ skip the AA filter, unless you want crap in your data. So I am a bit nervous with this fad of the "no-AA" sensors. (Disclaimer of disclaimer: I understand that probably at the pixel size we have now the lenses supply the needed AA effect /most/ of the time). Unfortunately, moiré is one of the effect of aliasing. Once you have aliasing in a set of digitized data, the original data is completely lost --- no way to recover it. See for example: http://users.wfu.edu/matthews/misc/DigPhotog/alias/ What you can do is to do the same as a (much lower frequency) AA filter would do: low pass (blur) the image, and the scale it down. Or paint over it... but the real detail data is lost. Romano -- Romano Giannetti http://www.rgtti.com/ ------------------------------------------------------------------------------ Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical & virtual servers, alerts via email & sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
