sergiofigliolia Posted October 18, 2011 Share #1 Posted October 18, 2011 Advertisement (gone after registration) Do you guys think it would be possible to correct the problem that leads us to use UV IR filters in photoshop? I guess it should be. This would result in sparing some money and some problems too. We've all shot images at night and those filters are quite annoying with their reflections... Quote Link to post Share on other sites More sharing options...
Advertisement Posted October 18, 2011 Posted October 18, 2011 Hi sergiofigliolia, Take a look here UV IR filter in photoshop?. I'm sure you'll find what you were looking for!
mjh Posted October 18, 2011 Share #2 Posted October 18, 2011 Do you guys think it would be possible to correct the problem that leads us to use UV IR filters in photoshop? No, it’s not possible. Not in any simple, easily automated way that is. If you don’t mind a lot of work, sometimes recreating the colour from scratch, it is certainly doable. Quote Link to post Share on other sites More sharing options...
Brett Cambern Posted October 19, 2011 Share #3 Posted October 19, 2011 Although I have not tried them myself, Jamie Roberts created profiles that were supposed to deal with the IR problem quite successfully. Here is a link to the thread: http://www.l-camera-forum.com/leica-forum/leica-m8-forum/9637-new-m8-profiles-c1-instructions.html Quote Link to post Share on other sites More sharing options...
mjh Posted October 19, 2011 Share #4 Posted October 19, 2011 Although I have not tried them myself, Jamie Roberts created profiles that were supposed to deal with the IR problem quite successfully. These only deal with the magenta discoloration of blacks while IR contamination can affect all colors. 1 Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted October 20, 2011 Share #5 Posted October 20, 2011 A comprehensive "filtering in photoshop" Is practically impossible... for the reason that the color shift is dependent on the subject MATERIAL (fabrics, foliage....) : it happened to me (with M8 unfiltered) to have few cases in which I got in the same pic a blue correct and a very similar blue "shifted" (fabric)... a digital filter can't recognize materials... ... unless one makes a very annoying (and sometimes next to impossible) job of selection of involved areas... Quote Link to post Share on other sites More sharing options...
sergiofigliolia Posted October 21, 2011 Author Share #6 Posted October 21, 2011 I should understand then how an optical filter would "recognize materials" then... Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted October 21, 2011 Share #7 Posted October 21, 2011 (edited) Advertisement (gone after registration) I should understand then how an optical filter would "recognize materials" then... ... no of course... ... but does recognize UVIR frequencies/spectrum (reflected by certain materials) and blocks them... a digital filter can count only on colors' values in a bitmap (or, if is one of the "smart" type, recognize certain shapes like faces / eyes...) Edited October 21, 2011 by luigi bertolotti 1 Quote Link to post Share on other sites More sharing options...
sergiofigliolia Posted October 21, 2011 Author Share #8 Posted October 21, 2011 thanks Luigi. A good explanation! Quote Link to post Share on other sites More sharing options...
Guest srheker Posted October 21, 2011 Share #9 Posted October 21, 2011 I should understand then how an optical filter would "recognize materials" then... A filter does not need to recognize certain materials, it just prevents certain materials from coming in. A fly screen is quite a simple construction (it's simply a filter that keeps objects the size of a fly from passing your window) a machine that finds and and removes flies on the various pieces of furniture and all the other stuff in your house would need a far more sophisticated design. Quote Link to post Share on other sites More sharing options...
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