[Darktable-users] Metadata in JPG images

2013-06-07 Thread Willem Ferguson
I write metadata into the sidecar files using the dt metadata tool, and I am only starting to get into the complexities of managing this if using several pieces of software to access images. My normal workflow is to process the raw images, including the addition of metadata. In order to actuall

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Ulrich Pegelow
Am 07.06.2013 22:31, schrieb johannes hanika: > > > 2) pixels that are driven above L=100 in darktable, e.g. in the > basecurve module. There is no convenient method ATM to bring them > back into reasonable values. Shadows&Highlights would be a good > candidate. But the current imp

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Lucas Krech
One alternate to the base curve is to turn it off entirely and create your own presets using the tone curve. Or craete your own base curve preset. I process most of my stuff to black and white but find the tone curve typically a more useful and versatile tool for both B&W and color. -L

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread johannes hanika
On Sat, Jun 8, 2013 at 8:02 AM, Ulrich Pegelow wrote: > Am 07.06.2013 12:57, schrieb johannes hanika: > > my 2ct: >> >> - underexposure + digital exposure correction is terrible wrt noise >> >> - i think our highlight reconstruction (this is about hardware clipped >> pixels in the input) has some

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread johannes hanika
i just used it on clouds, i mixed red into gray to get b/w detail in the clouds back. conditional blending ftw :) On Sat, Jun 8, 2013 at 8:08 AM, David Vincent-Jones wrote: > It doesn't work on blown clouds of course ... it turns the clouds blue, > which is not exactly what one would want but if

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread David Vincent-Jones
It doesn't work on blown clouds of course ... it turns the clouds blue, which is not exactly what one would want but if it is a bare sky that is blown it works fairly well. David On 13-06-07 12:22 PM, johannes hanika wrote: > wow, that is a surprisingly cool trick, works really well. thanks for

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Ulrich Pegelow
Am 07.06.2013 12:57, schrieb johannes hanika: > my 2ct: > > - underexposure + digital exposure correction is terrible wrt noise > > - i think our highlight reconstruction (this is about hardware clipped > pixels in the input) has some problems currently, if i find some time i > want to fix this. >

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread johannes hanika
wow, that is a surprisingly cool trick, works really well. thanks for the hint (i'm still going to fix the highlights module..). -jo On Sat, Jun 8, 2013 at 4:06 AM, David Vincent-Jones wrote: > I am noticing that with some blown sky situations if I use a parametric > mask on the magenta area an

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread David Vincent-Jones
I am noticing that with some blown sky situations if I use a parametric mask on the magenta area and then use the channel mixer to drop the red value to that of the green value, some level of the blue sky can often be recovered. David On 13-06-07 08:22 AM, Rob Z. Smith wrote: > OK, let me subs

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Chris Siebenmann
| I haven't worked on a blown colour casted highlight reconstruction | recently, but it strikes me that we can perhaps deal with such colour | casts more easily in dt than any of the other raw converters. Let's | say our reconstruction causes a typical magenta colour cast in the | reconstructed ar

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Rob Z. Smith
That spoils all the fun :-) ... and sometimes the results as well. -Original Message- From: Chris Siebenmann [mailto:c...@cs.toronto.edu] 'let the camera metering do what it wants' approach The content of this email is private and confidential, and unless otherwise stated only the int

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Rob Z. Smith
OK, let me substitute 'not quite white' instead of grey. Imagine what is probably the most frequent use case of blown out areas in clouds. Rather than losing all detail my thoughts are that it might be best to do something like map (255,255,255) to white but say (255,254,243) to some averaged

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Chris Siebenmann
| Surely the best thing to do is to just shoot normally, expose properly | and, if the Nikon base curve is excessively boosting highlights, use a | different curve. I certainly wouldn't want to go around underexposing | my shots just to suit a particular raw development tool whether this | is dt o

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Chris Siebenmann
| my 2ct: | | - underexposure + digital exposure correction is terrible wrt noise This is apparently potentially camera dependent. Some recent cameras have had noise profiles such that *for noise* it didn't matter what ISO you shot at; underexposure and then bringing the exposure up in post-proc

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Chris Siebenmann
| On 13-06-06 10:14 AM, Chris Siebenmann wrote: | > I would be happy to see a highlights reconstruction option for 'if | > any channel is clipped, set the pixel to white'. I might even turn | > it on all the time. [...] | | It might be nicer if such an option set the pixel to grey rather

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread johannes hanika
my 2ct: - underexposure + digital exposure correction is terrible wrt noise - i think our highlight reconstruction (this is about hardware clipped pixels in the input) has some problems currently, if i find some time i want to fix this. j. On Fri, Jun 7, 2013 at 11:34 AM, Rob Z. Smith wrote:

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Rob Z. Smith
Surely the best thing to do is to just shoot normally, expose properly and, if the Nikon base curve is excessively boosting highlights, use a different curve. I certainly wouldn't want to go around underexposing my shots just to suit a particular raw development tool whether this is dt or not.

Re: [Darktable-users] Solved: Darktable crashing on Canon CR2 fles

2013-06-07 Thread HaJo Schatz
Johannes, Here's a readable backtrace and debug-all output of the crash, maybe that gives you an idea -- in case you're still interested in understanding the mystery that is :) http://www.hajo.net/pub/Various/temporary/dt-1.2.1-crash-logs.tar.gz Greetings, Hajo PS: Apologies -- if I remembered

Re: [Darktable-users] Best way to recover highlights that are blown in processing?

2013-06-07 Thread Rob Z. Smith
It might be nicer if such an option set the pixel to grey rather than white using the values of the remaining unblown channels to take a best guess at how near to full white that grey should be. -Original Message- From: David Vincent-Jones [mailto:davi...@frontier.com] Sent: 06 June 2013

Re: [Darktable-users] Embed Metadata in Original Files

2013-06-07 Thread jeremy rosen
please look into the wiki (and my previous mail about lua) on how to do > it you can also ask me any questions on lua, either here or on IRC >> > > I think the first step for me would be to learn yet another language. ;) > Anyway, I think it's an interesting option. I've some ideas here, but