TacTZilla Posted February 16, 2010 Share #1 Posted February 16, 2010 Advertisement (gone after registration) Haven't really been following the 'red edge' issue, but took this shot today and got a 'red' issue, but within the image rather than the edge. Anyone seen this before? Cheers Bob Link to post Share on other sites More sharing options...
Advertisement Posted February 16, 2010 Posted February 16, 2010 Hi TacTZilla, Take a look here Red Edge - Red Middle?. I'm sure you'll find what you were looking for!
gravastar Posted February 16, 2010 Share #2 Posted February 16, 2010 I've seen this on bright specular highlights such as sunlight on water or wet beach sand in sunlight. If you zoom into the image is the pink coloration uniform in the shadows and mid tones or only where there's a bright highlight of the sun reflecting from the wet path? It could also be a form of moire which only shows up on fine detail in the area where the lens is focused. If it's only the highlights I believe people have been successful in removing it with the purple fringe reduction feature in Capture One. Bob. Link to post Share on other sites More sharing options...
k_g_wolf ✝ Posted February 16, 2010 Share #3 Posted February 16, 2010 Never seen before, could it be from the red jacket ? What lens was it on the M9 ? Best GEORG Link to post Share on other sites More sharing options...
Guest WPalank Posted February 16, 2010 Share #4 Posted February 16, 2010 What Bob said. See my image in this thread about midway through: http://www.l-camera-forum.com/leica-forum/digital-post-processing-forum/115965-fringing-technical-problem.html Mine was effected by almost the exact color at the same spot in the images. Hmmmm... Link to post Share on other sites More sharing options...
C_R Posted February 16, 2010 Share #5 Posted February 16, 2010 Bob is right, this is sensor blooming in the highlights. Select > color > desaturate in PS, for example Link to post Share on other sites More sharing options...
TacTZilla Posted February 16, 2010 Author Share #6 Posted February 16, 2010 Thanks folks. I was using the latest 50mm lux. Here's a crop. B Link to post Share on other sites More sharing options...
Guest WPalank Posted February 16, 2010 Share #7 Posted February 16, 2010 Advertisement (gone after registration) Boy, that almost looks like a mosaic pattern. Could be the rocks. You're not using a pre-Intel Mac by any chance are you? Link to post Share on other sites More sharing options...
TacTZilla Posted February 16, 2010 Author Share #8 Posted February 16, 2010 Nope. Intel iMAC. B Link to post Share on other sites More sharing options...
jaapv Posted February 16, 2010 Share #9 Posted February 16, 2010 Explanation-Solution: http://www.l-camera-forum.com/leica-forum/digital-post-processing-forum/115965-fringing-technical-problem.html Link to post Share on other sites More sharing options...
AlanG Posted February 16, 2010 Share #10 Posted February 16, 2010 There is something going terribly wrong in that picture. When I saw that photo my mind flashed on the first sample pictures from the Kodak 14n. These are still on line at Kodak Japan for some reason - Kodak Professional DCS Pro 14n A 100% crop of the highlights in water has a similar broken up look to the color but isn't confined to one part of the sensor. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/112825-red-edge-red-middle/?do=findComment&comment=1228341'>More sharing options...
jaapv Posted February 16, 2010 Share #11 Posted February 16, 2010 This, Alan, is different. It is edge colour shift at the high-contrast edges during Bayer interpolation. It varies per RAW converter, but it is governed by contrast and lens. The higher the microcontrast of a lens the worse it is. It is comparable to - but not identical to- moire. The best remedy is to a. use C1 and b. use the colour replacement brush to correct, as Steve suggested. It is interesing how the colour of the artefact shifts with the focus in the image I posted in the other thread. In front: red. In the plane of focus: magenta. And back of the focus: blue. Bob's image shows this effect as well. That alone proves that it is not a sensor-bloom type of occurrence. Link to post Share on other sites More sharing options...
AlanG Posted February 16, 2010 Share #12 Posted February 16, 2010 I know it looks different, and the cause is probably different too. I wasn't refering to how the color shifts across the sensor - that is very different. But the way the highlights get broken up into pixelized spots was familiar. Both images show a lack of some kind of basic issue or a processing problem. I'm not qualified to say what other than each company missed it. (Or Kodak missed both.) Link to post Share on other sites More sharing options...
adan Posted February 17, 2010 Share #13 Posted February 17, 2010 Well, both the Kodak camera (with a FillFactory sensor), and the M8/M9 with a gen-u-wine Kodak sensor, lack AA filters, and I'm sure moire is a factor in both images, which is why the sense of deja vu. Other factors like a touch of blooming and fringing, or the RAW converter, no doubt play roles, too. In other words, Jaap and Alan are both mostly right. In Bob's picture, I'd say the red/magenta band is quite literally showing the DoF - the area of the path where the images of the pebbles are sharp enough to create an interference pattern and some moire/color fringing amidst the pixels. In front of or behind the band, the image is just fuzzy enough to act as its own moire filter. (BTW the reason the tint is magenta is because the red and blue pixels are more widely separated than the green pixels, so they get "confused" faster by fine details/textures. Red + blue = magenta.) Link to post Share on other sites More sharing options...
AlanG Posted February 17, 2010 Share #14 Posted February 17, 2010 Well, both the Kodak camera (with a FillFactory sensor), and the M8/M9 with a gen-u-wine Kodak sensor, lack AA filters,... Lack of an AA filter certainly could be a big factor but there are other cameras that don't have AA filters and I think they would work fine in a similar situation. And moire is defined as an interference pattern and these subjects are all random and the color "dots" look like high speed film grain or a magnified stochastic printing system just in the sharp highlight area. Then look smooth and normal elsewhere. I think the image processing is totally breaking down in these areas and is just generating something to fill in. This almost has to be a processing anomaly almost like an effect you'd generate in Photoshop. I almost could understand issues appearing on the 14n as that was so early in the digital camera era. (Although Kodak had a lot of experience by then.) But 8 years later? Boy am I out of my depth here. Somebody at Leica who really knows what is going on and how to fix it will have to step up to the plate. I haven't a clue... between the sensor, the IR filter, the micro lenses, the image processor, the firmware, there's a lot going on. Even desaturated, it doesn't look right. So it is not just a color problem. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/112825-red-edge-red-middle/?do=findComment&comment=1228580'>More sharing options...
viramati Posted February 20, 2010 Share #15 Posted February 20, 2010 another example. Shot into the light (lux 50 ASPH f5.6) and seems to happen with highly reflective dark surfaces. Is worse when viewed in LR2.6 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/112825-red-edge-red-middle/?do=findComment&comment=1232574'>More sharing options...
pop Posted February 20, 2010 Share #16 Posted February 20, 2010 Silly question, and sorry if it's too trite: were IR blocking filters in use when taking those pictures with the purplish areas? Link to post Share on other sites More sharing options...
viramati Posted February 20, 2010 Share #17 Posted February 20, 2010 not on mine Link to post Share on other sites More sharing options...
diogenis Posted February 20, 2010 Share #18 Posted February 20, 2010 Guys, can anyone of you that have the C1 software process it with this one instead? Which processor are you using Bob? Reason for this is that sometimes me too, I have seen color fringing on reflections, but when I process on C1 it goes away. Of course I don't have the M9, and your'w is a lot more severe, but still... And it's all in water reflections. Both yours and mine Link to post Share on other sites More sharing options...
viramati Posted February 20, 2010 Share #19 Posted February 20, 2010 Have tried converting the file in C1 (not that I really know how to use it) but on import it shows the same problem and if anything is worse!! Link to post Share on other sites More sharing options...
TacTZilla Posted February 20, 2010 Author Share #20 Posted February 20, 2010 Hi. No IR filter here. I import using LightRoom, but I open in and use Photoshop CS4. I was hoping to swap to using LR all the time, but find myself using PS because I'm used to it. Don't want to sound like a dumb ass, but whats C1 Duh! B Link to post Share on other sites More sharing options...
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