Re: [darktable-user] open CL 2.0.6
Thanks for sharing. Yours is a good example of an OpenCL system that is not limited by host<->device memory transfers. In a typical export job your system spends about 30% of its time in memory transfer, the rest is pure computing. That's a very good situation in which pinned memory does not give advantages - maybe even slow down a bit. Others have systems which are purely limited by memory transfer. We have reports of insane cases where over 95% of the OpenCL pixelpipe is used by memory transfers. Those are the ones where opencl_use_pinned_memory makes a real difference. Ulrich Am 15.09.2016 um 22:11 schrieb KOVÁCS István: Hi, Core2-Duo E6550 @ 2.33GHz +Nvidia GeForce GTX 650 / 2 GB, driver 361.42, OpenCL 1.2 CUDA, darktable 2.0.6 from PPA. With pinned memory, performance is slightly (about 10%?) worse. There are lines like [opencl_profiling] spent 0,3774 seconds in [Map Buffer] that are only seen in the 'pinned' log. One notable difference after exporting 114 photos: pinned = false gives [opencl_summary_statistics] device 'GeForce GTX 650': 8960 out of 8960 events were successful and 0 events lost pinned = true gives [opencl_summary_statistics] device 'GeForce GTX 650': 9933 out of 9933 events were successful and 0 events lost as one of the last lines in the output. My opencl-related darktablerc entries: opencl=TRUE opencl_async_pixelpipe=false opencl_avoid_atomics=false opencl_checksum=2684983341 opencl_device_priority=*/!0,*/*/* opencl_library= opencl_memory_headroom=300 opencl_memory_requirement=768 opencl_micro_nap=1000 opencl_number_event_handles=25 opencl_omit_whitebalance= opencl_size_roundup=16 opencl_synch_cache=false opencl_use_cpu_devices=false opencl_use_pinned_memory=false The logs are at: http://tech.kovacs-telekes.org/files/darktable-opencl-pinned-memory/ Thanks, Kofa darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Batch rename photos + sidecars OK, but...
* Jean-Luc CECCOLI [09-15-16 16:01]: > Hello, > > > Well, I realized afterwards that this quesstion was rather stupid... since I > had don a backup of the whole folder before renaming ! > > As it is, my algorithm renames both NEFs and sidecars in one pass. > The only bad side is that I must take the whole path into account for the cut > parameters. Being able to part subfolders would be better, but I am not that > far and I am rather happy with what I could do thanks to linux power. > Since I was to work on absolutely all my photos, I deleted the library, then > re-imported the photos and could notice that most of them retrieved their > history perfectly. > some did not, I intend to investigate why. > I was surprized to discover that the xmpMM:DerivedFrom section has been > updated according to the NEF new name without resetting the sidecar itself. > I don't know whether this behaviour is wanted or not, but in my case I am > very happy it did so. > > BTW, I didn't understand what you exactly mean by > > > remove the subj filmroll from dt > What am I supposed to do exactly ? > > Regards, > > J.-Luc > > > > > > > > > Message du 15/09/16 18:24 > > De : "Patrick Shanahan" > > > A : "Darktable Users List" > > Copie à : > > Objet : Re: [darktable-user] Batch rename photos + sidecars OK, but... > > > > * Jean-Luc CECCOLI [09-15-16 12:04]: > > > Hello, > > > > > > > > > I decided to rename all my photos + sidecars to delete one useless > > > character. > > > The files are into subfolders under one single main folder. > > > >From within the main folder, this gives something like > > > >./20160625/180523670.NEF, which will be convenient. > > > > > > After some search on the web, I was able to do this : > > > > > > for file in $(find -name "*.NEF*"); do NF=$(echo $file|cut -c1-19,21-) && > > > mv $file $NF; done > > > > > > which did the job, but... how could I do to modify le reference within > > > the sidecar so as it matches the new name ? > > > > Modify your rename algorithm and apply to the sidecar/xml files, then > > remove the subj filmroll from dt and import the newly named files. dt > > will see your changes in the xml files. > > > > -- > > (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri > > http://en.opensuse.org openSUSE Community Member facebook/ptilopteri > > http://wahoo.no-ip.org Photo Album: http://wahoo.no-ip.org/gallery2 > > Registered Linux User #207535 @ http://linuxcounter.net > > > > darktable user mailing list > > to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org > > > > > > darktable user mailing list > to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org > Select all the photos in subj film-roll and on the right panel of lighttable view in the group "selected image[s]" select remove. And I am only 75. ps: why not trim all the excess quoting? -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri http://wahoo.no-ip.orgPhoto Album: http://wahoo.no-ip.org/gallery2 Registered Linux User #207535@ http://linuxcounter.net darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Batch rename photos + sidecars OK, but...
Le jeudi 15 septembre 2016 18:03:58 Jean-Luc CECCOLI a écrit : > I decided to rename all my photos (...) > but... how could I do to modify le reference within the sidecar so as it > matches the new name ? I would use KFileReplace or something analog. (*) Just to say and off topic : a handfull years ago I wrote in my Linux user group list that Darktable would one day be the best soft on the market for digital photo treatment. It is done, in my opinion : it's easy and I win about 50% time for treating mine, coming from Lightzone or/and AftershotPro. (I'm an advanced amateur and use to practice photography for about 55 years, wenting digital in 2003) Serge (*) I'm 70 and not bearded so I would have used KRename before... :-) darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] open CL 2.0.6
Hi, Core2-Duo E6550 @ 2.33GHz +Nvidia GeForce GTX 650 / 2 GB, driver 361.42, OpenCL 1.2 CUDA, darktable 2.0.6 from PPA. With pinned memory, performance is slightly (about 10%?) worse. There are lines like [opencl_profiling] spent 0,3774 seconds in [Map Buffer] that are only seen in the 'pinned' log. One notable difference after exporting 114 photos: pinned = false gives [opencl_summary_statistics] device 'GeForce GTX 650': 8960 out of 8960 events were successful and 0 events lost pinned = true gives [opencl_summary_statistics] device 'GeForce GTX 650': 9933 out of 9933 events were successful and 0 events lost as one of the last lines in the output. My opencl-related darktablerc entries: opencl=TRUE opencl_async_pixelpipe=false opencl_avoid_atomics=false opencl_checksum=2684983341 opencl_device_priority=*/!0,*/*/* opencl_library= opencl_memory_headroom=300 opencl_memory_requirement=768 opencl_micro_nap=1000 opencl_number_event_handles=25 opencl_omit_whitebalance= opencl_size_roundup=16 opencl_synch_cache=false opencl_use_cpu_devices=false opencl_use_pinned_memory=false The logs are at: http://tech.kovacs-telekes.org/files/darktable-opencl-pinned-memory/ Thanks, Kofa On 15 September 2016 at 16:16, Ulrich Pegelow wrote: > Thanks. That's a small advantage for opencl_use_pinned_memory=TRUE. > > Still even with the flag set to TRUE we loose quite some time in the > host_memory->device_memory step. I expect that I can change our code to get > some further improvements there in the next days. > > Ulrich > > > Am 15.09.2016 um 16:10 schrieb Chester: >> >> ULrich: here are my config and the two files: >> >> darktable --version >> this is darktable 2.0.6 >> copyright (c) 2009-2016 johannes hanika >> darktable-...@lists.darktable.org >> >> compile options: >> bit depth is 64 bit >> normal build >> OpenMP support enabled >> OpenCL support enabled >> Lua support enabled, API version 3.0.0 >> Colord support enabled >> gPhoto2 support enabled >> GraphicsMagick support enabled >> >> inxi >> CPU~Quad core Intel Core i7 930 (-HT-MCP-) speed/max~1600/2801 MHz >> Kernel~4.4.0-36-generic x86_64 Up~1:50 Mem~2072.5/20069.5MB >> HDD~3768.8GB(3.6% used) Procs~268 Client~Shell inxi~2.2.35 >> >> inxi -G >> Graphics: Card: NVIDIA GF106 [GeForce GTS 450] >>Display Server: X.Org 1.18.3 drivers: nvidia (unloaded: >> fbdev,vesa,nouveau) >>Resolution: 1680x1050@59.88hz, 1920x1200@59.95hz >>GLX Renderer: GeForce GTS 450/PCIe/SSE2 >>GLX Version: 4.5.0 NVIDIA 361.42 >> > > > darktable user mailing list > to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org > darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Batch rename photos + sidecars OK, but...
Hello, Well, I realized afterwards that this quesstion was rather stupid... since I had don a backup of the whole folder before renaming ! As it is, my algorithm renames both NEFs and sidecars in one pass. The only bad side is that I must take the whole path into account for the cut parameters. Being able to part subfolders would be better, but I am not that far and I am rather happy with what I could do thanks to linux power. Since I was to work on absolutely all my photos, I deleted the library, then re-imported the photos and could notice that most of them retrieved their history perfectly. some did not, I intend to investigate why. I was surprized to discover that the xmpMM:DerivedFrom section has been updated according to the NEF new name without resetting the sidecar itself. I don't know whether this behaviour is wanted or not, but in my case I am very happy it did so. BTW, I didn't understand what you exactly mean by > remove the subj filmroll from dt What am I supposed to do exactly ? Regards, J.-Luc > Message du 15/09/16 18:24 > De : "Patrick Shanahan" > A : "Darktable Users List" > Copie à : > Objet : Re: [darktable-user] Batch rename photos + sidecars OK, but... > > * Jean-Luc CECCOLI [09-15-16 12:04]: > > Hello, > > > > > > I decided to rename all my photos + sidecars to delete one useless > > character. > > The files are into subfolders under one single main folder. > > >From within the main folder, this gives something like > > >./20160625/180523670.NEF, which will be convenient. > > > > After some search on the web, I was able to do this : > > > > for file in $(find -name "*.NEF*"); do NF=$(echo $file|cut -c1-19,21-) && > > mv $file $NF; done > > > > which did the job, but... how could I do to modify le reference within the > > sidecar so as it matches the new name ? > > Modify your rename algorithm and apply to the sidecar/xml files, then > remove the subj filmroll from dt and import the newly named files. dt > will see your changes in the xml files. > > -- > (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri > http://en.opensuse.org openSUSE Community Member facebook/ptilopteri > http://wahoo.no-ip.org Photo Album: http://wahoo.no-ip.org/gallery2 > Registered Linux User #207535 @ http://linuxcounter.net > > darktable user mailing list > to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org > > darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Mask windows
I ctl +click each node you need to have a right angle, and then a straight line follows. Hope that helps On Thu, 15 Sep 2016, 18:36 KOVÁCS István, wrote: > You may want to combine parametric masks (e.g. for bright white paint) > with roughly drawn shapes. > > On 15 Sep 2016 17:55, "Michael" wrote: > > I want to mask windows. HOw do I draw a mask with sharp corners and > straight edges? > > > darktable user mailing list to unsubscribe send a mail to > darktable-user+unsubscr...@lists.darktable.org > > > > > darktable user mailing list to unsubscribe send a mail to > darktable-user+unsubscr...@lists.darktable.org > darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Mask windows
You may want to combine parametric masks (e.g. for bright white paint) with roughly drawn shapes. On 15 Sep 2016 17:55, "Michael" wrote: I want to mask windows. HOw do I draw a mask with sharp corners and straight edges? darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Batch rename photos + sidecars OK, but...
* Jean-Luc CECCOLI [09-15-16 12:04]: > Hello, > > > I decided to rename all my photos + sidecars to delete one useless character. > The files are into subfolders under one single main folder. > >From within the main folder, this gives something like > >./20160625/180523670.NEF, which will be convenient. > > After some search on the web, I was able to do this : > > for file in $(find -name "*.NEF*"); do NF=$(echo $file|cut -c1-19,21-) && mv > $file $NF; done > > which did the job, but... how could I do to modify le reference within the > sidecar so as it matches the new name ? Modify your rename algorithm and apply to the sidecar/xml files, then remove the subj filmroll from dt and import the newly named files. dt will see your changes in the xml files. -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri http://wahoo.no-ip.orgPhoto Album: http://wahoo.no-ip.org/gallery2 Registered Linux User #207535@ http://linuxcounter.net darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
[darktable-user] Batch rename photos + sidecars OK, but...
Hello, I decided to rename all my photos + sidecars to delete one useless character. The files are into subfolders under one single main folder. >From within the main folder, this gives something like >./20160625/180523670.NEF, which will be convenient. After some search on the web, I was able to do this : for file in $(find -name "*.NEF*"); do NF=$(echo $file|cut -c1-19,21-) && mv $file $NF; done which did the job, but... how could I do to modify le reference within the sidecar so as it matches the new name ? Regards, J.-Luc darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
[darktable-user] Mask windows
I want to mask windows. HOw do I draw a mask with sharp corners and straight edges? darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] open CL 2.0.6
Thanks. That's a small advantage for opencl_use_pinned_memory=TRUE. Still even with the flag set to TRUE we loose quite some time in the host_memory->device_memory step. I expect that I can change our code to get some further improvements there in the next days. Ulrich Am 15.09.2016 um 16:10 schrieb Chester: ULrich: here are my config and the two files: darktable --version this is darktable 2.0.6 copyright (c) 2009-2016 johannes hanika darktable-...@lists.darktable.org compile options: bit depth is 64 bit normal build OpenMP support enabled OpenCL support enabled Lua support enabled, API version 3.0.0 Colord support enabled gPhoto2 support enabled GraphicsMagick support enabled inxi CPU~Quad core Intel Core i7 930 (-HT-MCP-) speed/max~1600/2801 MHz Kernel~4.4.0-36-generic x86_64 Up~1:50 Mem~2072.5/20069.5MB HDD~3768.8GB(3.6% used) Procs~268 Client~Shell inxi~2.2.35 inxi -G Graphics: Card: NVIDIA GF106 [GeForce GTS 450] Display Server: X.Org 1.18.3 drivers: nvidia (unloaded: fbdev,vesa,nouveau) Resolution: 1680x1050@59.88hz, 1920x1200@59.95hz GLX Renderer: GeForce GTS 450/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 361.42 darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Archives
On Thu, 15 Sep 2016 07:42:42 -0400 Jonathan Niehof wrote: > On Thu, Sep 15, 2016 at 7:09 AM, J. Paul Bissonnette > wrote: > > Could some one tell me how to access the archives in this list? > > https://www.mail-archive.com/darktable-user@lists.darktable.org/ > > -dev archives: > https://www.mail-archive.com/darktable-dev@lists.darktable.org/ > > Linked from: > http://www.darktable.org/contact/ > > darktable user mailing list > to unsubscribe send a mail to > darktable-user+unsubscr...@lists.darktable.org > Thanks I have now book marked it. darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Archives
On Thu, Sep 15, 2016 at 7:09 AM, J. Paul Bissonnette wrote: > Could some one tell me how to access the archives in this list? https://www.mail-archive.com/darktable-user@lists.darktable.org/ -dev archives: https://www.mail-archive.com/darktable-dev@lists.darktable.org/ Linked from: http://www.darktable.org/contact/ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] Making a local colour change?
Thank you. The gain sliders on the color balance module work brilliantly. I try Ariel's suggestion of using colorize, but I found it easier to use color correction. However this way works much better. On Wed, 14 Sep 2016 at 22:52 Matthieu Moy wrote: > I'd try "color balance", using the "gain" sliders which affect essentially > highlights. > > Otherwise, try "color zones" to change the color, with a parametric mask > to select only the highlights. > > In any case, I think you'll need to reduce the exposure: if some color > channels are clipped, no module can do the job as the result you'd expect > is not representable in your colorspace. > > - Original Message - > > To make it explicit, if it wasn't already clear - I know what it should > > look like - I just need to change the two areas (I can draw a mask) to > that > > particular colour. > > I just don't know what module I can use to easily do that. > > I looked at the modules in the color section, and didn't see one I > thought > > I knew how to use. > > > > On Wed, 14 Sep 2016 at 17:50 Colin Adams > wrote: > > > > > I don't think it does. > > > Color reconstruction module uses surrounding colour. That won't work > here. > > > > > > On Wed, 14 Sep 2016 at 17:35 Ariel Kanterewicz > wrote: > > > > > >> You may want to look at this post from the blog: > > >> http://www.darktable.org/2015/03/color-reconstruction/ > > >> It explains a solution for pretty much the same issue you have here. > > >> > > >> On Wed, Sep 14, 2016 at 4:54 AM Colin Adams > > > >> wrote: > > >> > > >>> I took this photo with flash: > > >>> https://www.dropbox.com/s/f6bmy554la7quho/132441800.jpg?dl=0 > > >>> > > >>> and it is clearly overexposed in the foreground. Using the graduated > > >>> density module gives a very nice result, all except for the two large > > >>> yellow oval patches on the thorax - these should be a (yellowish) > green. > > >>> The histogram for these areas shows that both the red and green > channels > > >>> are blown out in these areas. But I guess I should be able to alter > the > > >>> colour locally in some way (by reducing the red channel, and maybe > some > > >>> of > > >>> the green). What's the best module to use to do this? > > >>> > > >>> > > > >>> darktable user mailing list to unsubscribe send a mail to > > >>> darktable-user+unsubscr...@lists.darktable.org > > >>> > > >> > > > > > > > darktable user mailing list > > to unsubscribe send a mail to > darktable-user+unsubscr...@lists.darktable.org > > -- > Matthieu Moy > http://www-verimag.imag.fr/~moy/ > darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
[darktable-user] Archives
Could some one tell me how to access the archives in this list? darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] 360 degree panoramas
Hi, I've also done panoramas from a monopod, eg from a mountain top. The monopod helps to keep the horizon even, compared to a free hand approach. Of course, a tripod improves quality even further, but it's not a must. Cheers Michael Am 15. September 2016 09:18:59 MESZ, schrieb Tobias Ellinghaus : >Am Mittwoch, 14. September 2016, 17:16:34 CEST schrieb Anton Aylward: > >[...] > >> One ABSOLUTE requirement you *** MUST *** get for panoramic shots is >a >> tripod. You need a stable platform. A tripod with a tilt&rotate head >is >> going to let you rotate smoothly so it is is easier when you piece >together >> you shots using 'hungin'. > >Sorry, but that is not true. As long as there are no objects near the >camera >that could introduce parallax errors (i.e., they move relative to the >background between images because you are not rotating the camera >around its >nodal point, so you are basically looking behind the object) you can >get >perfectly fine panoramas shooting free hand. Kees (andabata on IRC) >does that >all the time with awesome results. Have a look at his Flickr page for >examples > > https://www.flickr.com/photos/andabata/ > >That being said, a tripod with a panoramic head IS at least a HUGE help >when >there are more layers in the scene then just a flat foreground and a >background. > >[...] > >Tobias darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] open CL 2.0.6
Am 15.09.2016 um 09:31 schrieb Tobias Ellinghaus: With a speed difference like that, couldn't we run a small benchmark at init time (we already compare the speed to the CPU) and set the flag accordingly at runtime? Probably we should. Ulrich darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
Re: [darktable-user] open CL 2.0.6
Am Mittwoch, 14. September 2016, 18:56:03 CEST schrieb Ulrich Pegelow: [...] > There is a quick fix for that in darktable. You can switch config > variable opencl_use_pinned_memory to TRUE (can be found in darktablerc). > At least here on my this makes a difference of up to a factor of 30 > (oldish GeForce GTS 450 and 367.35 driver). [...] > If my findings are confirmed we will change the default setting of that > flag for new installations. Users of existing installations will need to > change the config flag manually. With a speed difference like that, couldn't we run a small benchmark at init time (we already compare the speed to the CPU) and set the flag accordingly at runtime? > Please check and report back. > > Ulrich Tobias [...] signature.asc Description: This is a digitally signed message part.
Re: [darktable-user] 360 degree panoramas
Am Mittwoch, 14. September 2016, 17:16:34 CEST schrieb Anton Aylward: [...] > One ABSOLUTE requirement you *** MUST *** get for panoramic shots is a > tripod. You need a stable platform. A tripod with a tilt&rotate head is > going to let you rotate smoothly so it is is easier when you piece together > you shots using 'hungin'. Sorry, but that is not true. As long as there are no objects near the camera that could introduce parallax errors (i.e., they move relative to the background between images because you are not rotating the camera around its nodal point, so you are basically looking behind the object) you can get perfectly fine panoramas shooting free hand. Kees (andabata on IRC) does that all the time with awesome results. Have a look at his Flickr page for examples https://www.flickr.com/photos/andabata/ That being said, a tripod with a panoramic head IS at least a HUGE help when there are more layers in the scene then just a flat foreground and a background. [...] Tobias signature.asc Description: This is a digitally signed message part.
Re: [darktable-user]
Am Donnerstag, 15. September 2016, 08:05:17 CEST schrieb Kevin: > Hi Tobias, > > Thanks for your help. My problem was that I expected the colour selected > within dt be the one in which the text was rendered. All OK now that I have > changed the colour in the svg itself. > > Which leaves the question: How is the colour you select within dt used? Well, as I said, it is used to replace any occurrence of $(WATERMARK_COLOR) within the SVG file. So if you replace the actual color with those letters then darktable will use the color selected in the watermark module. Same with the font and text. The variable names of those are mentioned in the tooltips of the settings. > Cheers, > Kev Tobias > On Wednesday, 14 September 2016 2:32:17 PM AEST Tobias Ellinghaus wrote: > > Am Mittwoch, 14. September 2016, 17:02:45 CEST schrieb kev: > > > Hi, > > > > Hi. > > > > > I'm having trouble with watermarks: How do you change the text colour? > > > > > > Yes, I've selected a colour via the colour chooser but how to I apply > > > that > > > colour to the current image? > > > > Is that with the simple-text example that comes with darktable or a custom > > one? In the first case it should just work. With a custom SVG file you > > would have to open the SVG in a text editor and replace the color strings > > for the text (something like "#00") with "$(WATERMARK_COLOR)". > > > > If you can't get it to work you can send me the SVG and I will edit it for > > you. Or just look at the file "simple-text.svg" in your darktable > > installation by opening it in a text editor. > > > > > Thanks in advance, > > > Kevin > > > > Tobias > > > darktable user mailing list > to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org signature.asc Description: This is a digitally signed message part.
Re: [darktable-user] 360 degree panoramas
Hi Michael, I think you are moving in the right direction. First use what you already have and invest in new equipment once you have a better feeling for what you need or want. It depends on your specific situation and requirements or wishes. I mentioned that I use fisheye lens and the reason is to keep the number of shots low (I need 6 to cover full circle plus one straight up and one down - that last one I take after removing the tripod hand-held). I shoot with Nikon so I bought their 10.5 mm full frame lens for cropped sensor cameras. But any wide angle lens would do. Or even not a wide angle if you want to do gigapixel panoramas. In that case you will probably shoot large number of photos - the opposite of what I am doing. The principles of stitching will be the same. In order to have least amount of paralax errors, using a panoramic bracket is advisable but not strictly necessary for outdoor. Yes, Nodal Ninja is one popular option. I had my bracket custom made by a friend. It's not perfect but does the job for what I need. Another option could be one of these - http://www.360precision.com - Or you could try some cheap product from China as sold on ebay, but I haven't seen or used them so cannot comment if they are worth the money. Regarding the pupil location, look how to identify "nodal point". It's fairly straightforward. You want to make sure that an object close to you is in the same relative position against background on both overlapping shots you are stitching. See for example this answer - https://photo. stackexchange.com/questions/47220/how-do-you-find-the-nodal-point-of-a-lens Cheers, Tomas -- Původní zpráva -- Od: Michael Komu: darktable-user@lists.darktable.org Datum: 14. 9. 2016 23:08:58 Předmět: Re: [darktable-user] 360 degree panoramas " Sorry about having a broad question but I am just starting out with this so I must start broad. And my broad question led to (what I suppose) are broad answers which is just what I need as a starting point. So, I suppose I will start with some specific questions: What equipment should I get? You say a fish eye lens. Other sites I've looked at in my research recommend an 8mm. Is that good? It has also been recommended I get a nodal ninja. Would you suggest that as well? I there any other equipment you would recommend? You mentioned a "panoramic bracket" What is a "panoramic bracket"?... my investigation into it shows that this is what a nodal ninja is but I need to be sure that they are the same thing. One thing further when asking around about how to identify the location of my lens "pupil" I was told that it was more or less in the middle of the lens... even with a zoom lens. HOw would I find the pupil with the 8mm (which I will get later) and with a zoom lens (which I have now). On Wed, Sep 14, 2016 at 3:32 AM, Tomas Sobek mailto:sanka...@seznam.cz)> wrote: " Hi Michael, In order to produce image like that you will need to dive into panorama photography. Personally I use Darktable to process my panorama images before a stitch and then stitch them using Hugin. More elaborate processes might have their advantages but I like to keep it simple. I shoot with DSLR + fisheye lens, tripod and panoramic bracket to keep the number of images low and stitching relatively easy. There are also specialised 360 degrees lenses available on the market, but I haven't experimented with any of them. As a general intro, read for example at http://www.digitaltrends.com/ photography/photography-101- how-to-shoot-360-degree- panoramas/ (http://www.digitaltrends.com/photography/photography-101-how-to-shoot-360-degree-panoramas/) If you chose to use Hugin for stitching (it would be a natural choice on Linux), there are useful tutorials available - http://hugin.sourceforge.net/ tutorials/index.shtml(http://hugin.sourceforge.net/tutorials/index.shtml) I noticed that the panorama you referred to is using Flash for presentation. I would suggest using a JavaScript based panorama player these days. Flash usage is generally deprecated. Check out for example free software https:// pannellum.org/(https://pannellum.org/) - You can see more examples of its use on my site - https://tomassobekphotography. co.nz/panoramas.php (https://tomassobekphotography.co.nz/panoramas.php) As you can see, your question is a rather broad one. Panorama photography might have a steep learning curve. However it is rewarding and worth the effort. Cheers, Tomas -- Původní zpráva -- Od: Michael mailto:bmi...@gmail.com)> Datum: 14. 9. 2016 6:27:55 Předmět: [darktable-user] 360 degree panoramas " Is there a way to do 360 degree panoramas with darktable like this one: http://tinyurl.com/35tfq9q(http://tinyurl.com/35tfq9q) ? HOw would you recommend I create one? __ __ __ __ darktable user mailing list to unsubscribe send a mail to darktable-use
