Guest stnami Posted November 10, 2006 Share #21 Posted November 10, 2006 Advertisement (gone after registration) Tried a correction in LAB colour, can be done but a fine line between success and disaster Link to post Share on other sites More sharing options...
Advertisement Posted November 10, 2006 Posted November 10, 2006 Hi Guest stnami, Take a look here M8: Back out of the box ( a possible solution : -). I'm sure you'll find what you were looking for!
palaeoboy Posted November 11, 2006 Share #22 Posted November 11, 2006 As someone has poined out what happens if there is a genuine purple object in the photo? On the RFF someone did some photoshop tweeks as well witha purple octopus in the shot, it went black/grey as well. Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 11, 2006 Share #23 Posted November 11, 2006 As someone has poined out what happens if there is a genuine purple object in the photo? On the RFF someone did some photoshop tweeks as well witha purple octopus in the shot, it went black/grey as well. I will check that definitevely today. My initial tests are very, very promising. Please check my other thread on "another possible workaround" Link to post Share on other sites More sharing options...
archi4 Posted November 11, 2006 Share #24 Posted November 11, 2006 Because I still only shoot film with my Leica cameras and I do not have a raw M8 file to play with, I wonder whether it would be possible to develop in Capture One Pro using a profile modified with the color editor. I do this with my Olympus E-1 and E-330 raw files quite successfully, as I am not quite happy with the skin tone which the standard C1 profile produces. Maurice Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 11, 2006 Share #25 Posted November 11, 2006 Because I still only shoot film with my Leica cameras and I do not have a raw M8 file to play with, I wonder whether it would be possible to develop in Capture One Pro using a profile modified with the color editor. I do this with my Olympus E-1 and E-330 raw files quite successfully, as I am not quite happy with the skin tone which the standard C1 profile produces. Maurice Maurice, I believe this is possible. I've done exactly that in the thread called "another possible workaround" It's also why I need a GM DCC shot. I'll do it today with a CC, but it's not quite the same. FWIW--here is a literal 30s LAB fix for the JPEG Marc posted. Still too much for proofing (IMO) but could be automated so would work for many, many people as a workaround. The magenta is truly neutralized, and the black is 0A and 0B. This could easily be an action, but this is nearly a monochromatic JPEG. I need the DNG files of a good reference!! Marc--you there? Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 11, 2006 Share #26 Posted November 11, 2006 Tried a correction in LAB colour, can be done but a fine line between success and disaster Always is in LAB The trick is to work with layers. But in my fix below, I didn't even play with transparency. Link to post Share on other sites More sharing options...
gogopix Posted November 11, 2006 Share #27 Posted November 11, 2006 Advertisement (gone after registration) Jamie very nice. I also noticed that the reddish reflection in the lens stays. but toned down.Probably mor ethe way it actually was, no? The selection can be quite narrow since it is almost pure red that is black/grey + the cast that means RGB will be x+M,x,x and in fact "x" will be small. you may want to go back and try replace color rather thanselect. The reason is you can control fuzziness of the color range and it even shows real time whereand how much will be replaced. I just haven't been seeing it. Only a few hundred shots, but nothing yet (though not trying, and McLean va is more into cotton with 77 degree weather! regards Victor Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 11, 2006 Share #28 Posted November 11, 2006 Jamievery nice. I also noticed that the reddish reflection in the lens stays. but toned down.Probably mor ethe way it actually was, no? The selection can be quite narrow since it is almost pure red that is black/grey + the cast that means RGB will be x+M,x,x and in fact "x" will be small. you may want to go back and try replace color rather thanselect. The reason is you can control fuzziness of the color range and it even shows real time whereand how much will be replaced. I just haven't been seeing it. Only a few hundred shots, but nothing yet (though not trying, and McLean va is more into cotton with 77 degree weather! regards Victor Viktor-- *There is NO selection here* Just a (not-so-simple) LAB curve. In a way, it's a post-profile. I kept the reds because I assume they're real This is why I need a DCC!!! Darn it! I just can't find one I can drive to and get!! Link to post Share on other sites More sharing options...
rvaubel Posted November 11, 2006 Share #29 Posted November 11, 2006 Viktor-- *There is NO selection here* Just a (not-so-simple) LAB curve. In a way, it's a post-profile. I kept the reds because I assume they're real This is why I need a DCC!!! Darn it! I just can't find one I can drive to and get!! Jamie I need DNG files too!! I have had a lot of experience at color profiling cameras with IR "pollution". I have, in the past, got perfectly satisfactory results. I would like a chance at it before the M8 is killed and I never get a chance to own one. I'm heading down to San Jose with my Greta color charts, black velvet, and SD card for a Leica Day at my local dealer. I feel sorry for the sales staff. Rex Link to post Share on other sites More sharing options...
gogopix Posted November 11, 2006 Share #30 Posted November 11, 2006 Associate Press "...nationwaide, people are noticing a run on black velvet. Will it be the next fashion craze? They are seeing it in bright sunlight, as car covers. The rage it taking the nation..." Film at 11 :-) Link to post Share on other sites More sharing options...
marknorton Posted November 11, 2006 Share #31 Posted November 11, 2006 I'm heading down to San Jose with my Greta color charts, black velvet, and SD card for a Leica Day at my local dealer. I feel sorry for the sales staff. Shows remarkable self-awareness of the impact you'll have on them Rex, LOL. Link to post Share on other sites More sharing options...
rvaubel Posted November 11, 2006 Share #32 Posted November 11, 2006 Shows remarkable self-awareness of the impact you'll have on them Rex, LOL. I am going to be nice. It will be interesting to see how the Leica representitives take all this. I expect there will be some rather hostile folks at the festivities. Last night they had a scheduled wine and cheese party. I'm not kidding. I would have paid an arm and a leg to be at that bloodbath:rolleyes: Rex I just want my M8 Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 11, 2006 Share #33 Posted November 11, 2006 Jamie I need DNG files too!! I have had a lot of experience at color profiling cameras with IR "pollution". I have, in the past, got perfectly satisfactory results. I would like a chance at it before the M8 is killed and I never get a chance to own one. I'm heading down to San Jose with my Greta color charts, black velvet, and SD card for a Leica Day at my local dealer. I feel sorry for the sales staff. Rex Rex, I'm almost set to go with some pretty definitive tests. Don't worry--the M8 won't be killed. It's *WAY* to good a camera, despite these birthing pains. Link to post Share on other sites More sharing options...
Jack_Flesher Posted November 12, 2006 Share #34 Posted November 12, 2006 Hi Marc, long time! Personally, I don't see the big poblem with using a filter, at least in studio or event applications, until Leica develops a more permanent solution. My shot is nowwhere near as nice as yours, but then I did not even take the time to turn my background over to its good side Anyway, here is my attempt at duplicating your result. Shot on the back (dirty) side of my black velveteen background, one Profoto D4 head above, white foamcore reflector to the right, M8 in AWB mode, DNG processed "as shot" in ACR. Everything in the image is black to my human eyes: Certainly similar results to yours, just differences in the particular materials that barfed... Now here is the set-up shot with my absorption Daylight IR cut filter (the clear cyan kind, not the hot mirror kind). Again, M8 AWB, DNG processed "as shot" in ACR, but I did add 1-stop for the filter which was about 1/2 stop too much: Anyway, it's certainly not perfect, but IMO getting close to good enough for proofing -- say 90% of the way there? Obviously it could be improved with a good profile for the filter and lights, but I think it shows promise as-is... Also, it is unfortunate I did not have the slightly stronger Tungsten IR cut absorption filter to test as I suspect it would have dealt completely enough with the IR bleed to the point it would be a non-issue. My .02 is that Leica will get around to figuring out they need to swap in a stronger IR cut filter over the sensor to eliminate this issue. Then all that will be needed is a firmware update to correct the WB and exposure for the new cut filter. Obviously the new sensor cut filter is non-trivial for them *and us*, but the firmware update should be pretty vanilla... Cheers, Link to post Share on other sites More sharing options...
Guest stnami Posted November 12, 2006 Share #35 Posted November 12, 2006 I am sure most of us can make do using these types of images. Black cameras are one thing but things could be a lot trickier with a photo of a young child in a red outfit in front of a black background holding pink flowers. Link to post Share on other sites More sharing options...
mwilliamsphotography Posted November 12, 2006 Author Share #36 Posted November 12, 2006 JACK !!! Good to hear from you buddy. Sprung for a M8 huh? Well, we'll see how it all shakes out. Just a regular IR cyan filter huh? That should be easier to find than these other ones maybe. I'm going to try the camera tomorrow during a family portrait session. If nothing else I'll just use it for B&W until they solve the color issues. Link to post Share on other sites More sharing options...
Jack_Flesher Posted November 12, 2006 Share #37 Posted November 12, 2006 If nothing else I'll just use it for B&W until they solve the color issues. That's how you always used the M anyway, isn't it? Seriously Bud, it's good to hear from you too! Hey, these M8 files are something else from a detail standpoint, eh? Nice to have an M back in my hands even if she is sort of an overweight sister -- but at least she can cook! Yes, the filter I used was the vanilla cyan absorption type and the above was even the realy weak daylight version, so I suspect the stronger tungsten one would eliminate all the current IR issues. Main benefit with the cyan absorption ones are no problems with color shift issues the hot-mirror filters can generate when used with wideangle lenses Cheers, Jack Link to post Share on other sites More sharing options...
carstenw Posted November 12, 2006 Share #38 Posted November 12, 2006 Interesting point about wide angles. These filters do have a 1.2 factor, or something similar, don't they? Link to post Share on other sites More sharing options...
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