--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Anthony G. Atkielski" <anthony@a...> wrote: > scrber writes: > > > Very informative post, thank you. > > But basically, no easy way right? > > No easy way that I know of. Basically, anything that requires human > intelligence, such as recognizing pimples on a face or selectively > correcting for color balance errors in mixed lighting, is going to > require a lot of hand work. The only things that can be automated to > any extent are those that can be done on the basis of pixel colors > alone. In digital retouching, there aren't that many things that can be > automated. Even sky modifications, as simple as they might seem from a > human standpoint, are often impossible to automate to any extent. > > > 1. Use a polariser > > Yes. > > > 2. Use hue/sat / whatever conversion methods appropriate to get dark > > skies without posterisation > > Yes, although 8-bit data may posterize if you have to make a sharp > change. No way to avoid that. > > > 3. Darker (is PAINT) manually to darken > > Yes. And posterization may still be a problem for 8-bit data. > > > Right? Pretty much what I've been doing, but its so da*n slow and > > I'm naff at it! > > You get faster in time, but it is never quick and easy. > > I spend a lot of time on night shots, for example, because varied light > sources always mess up the color balance, and because sharp contrasts > make some sort of adjustment to recover detail in highlights and shadows > necessary. Both of these always involve lots and lots of time spent > brushing over the image by hand. The results can be pretty impressive. > > It's best to have a deep, high-resolution image to work with. That > means a deep scan (10 bits, 12 bits, or however many you can get) at > high resolution, or a digicam image with the same characteristics. It's > extremely difficult and often disappointing to try to adjust 8-bit data, > and low resolution also can turn an image to mud if you have to retouch > anything. > > One of the things I like about shooting Portra 400BW is its range; the > film is low contrast, but for night shots that is an advantage. See > > http://www.mxsmanic.com/stairs.jpg > > This image had a _lot_ more contrast originally, with nearly blocked > shadows and seemingly blown highlights. But a deep scan revealed lots > of detail in the shadows and highlights, and a lot of burning and > dodging in the digital realm reduced the contrast and restored good > detail from corner to corner. Shadows on the dark surface of the water > were preserved by the film, as were details in the bright spot on the > wall near the lamppost. > > This image was a similar case > > http://www.mxsmanic.com/artists.jpg > > The original was a lot more contrasty. But the film had actually > recorded a lot of shadow and highlight detail, even though it wasn't > initially obvious. Extensive dodging and burning brought out this > detail, so that virtually no part of the image has that ugly featureless > black or white look of an image with blown highlights and shadows. > > Color and slide film are much more difficult. For example: > > http://www.atkielski.com/Wallpapers/display.php? picfile=PlaceVendome&picwidth=800&picheight=600 > > This image was dramatically retouched. The colors were all over the > place in the original, and the contrasts were frightening. I must have > spent an hour or more trying to get this one to look okay. The result > still isn't ideal, but it looks a thousand times better than the > original, believe me! At least the final version kinda sorta resembles > what I actually saw in person. > > One of the nice things about B&W is that you don't have to worry about > color balance. > > -- AA Thanks, pretty much sums it up. Night shots dont bother me so much because you can bleed to black and mask so easily as the rest of the shot is normally inherantly dark. I struggle with simple blue cloudy skies and getting them 'ansel adams' dark. I do capture digitally and therefore my films days are gone. This is the kind of image I mean : http://www.hang-up.co.uk/Images/brochure/full%20jpegs/020706% 20panorama%20crummock%20B&W%20copy.jpg Using channel mixer to darken it generates awful noise, I can smooth it out (generating banding) and add noise back in but I just wondered if this workflow really made sense to the experts. Thanks again for your feeback. Love the stairs picture by the way, saw it before a long time ago...! Steve. http://www.hang-up.co.uk/Images/brochure/full%20jpegs/020706% 20panorama%20crummock%20B&W%20copy.jpg
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Re: Darkening Skies digitally - how??
2003-12-14 by scrber
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