-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars. How can I do that, in Linux? (If not in Linux, then Windows) The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines. - -- Cheers Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlpExqwACgkQtTMYHG2NR9Wx4wCeIQwmWno8jYCRWUt8xFSE9wAK GD8AoIdqA5L24gZPtzhcwKn70MZ0e+VX =S928 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 28/12/17 05:25 AM, Carlos E. R. wrote:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Hopefully each image has a lot of the landscape in common so they can be aligned. The normal tools to do this kind of overlay are for HDR. It assumes you are overlaying a +1 and - over/under exposure to ewnhance the image. I won't go into the why of HDR. But it does overlay the images and combine them as you point out. - there is a HDR plugin for GIMP - there is hugin_hdrmerge - Merge overlapping images which has a LOT of parameters you can tweak! - there is Luminance HDR Luminance HDR is an open source graphical user interface application that aims to provide a workflow for HDR imaging. I've tried this and its very good - there is openexr, which I haven't tried - these is pfstools And of course there is the powerful manipulation command line tool ImageMagick, which can do pretty much anything you want, and which I'd look at first in your case. it has some GUI front ends/wrappers from 3rd parties. - there are options in other photoprocesing tools such as Darktable -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 2017-12-28 13:51, Anton Aylward wrote:
On 28/12/17 05:25 AM, Carlos E. R. wrote:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Hopefully each image has a lot of the landscape in common so they can be aligned.
I didn't move the camera for the entire session, using a tripod. It is the sky which moves, ie, the Earth which rotates.
The normal tools to do this kind of overlay are for HDR. It assumes you are overlaying a +1 and - over/under exposure to ewnhance the image. I won't go into the why of HDR. But it does overlay the images and combine them as you point out.
All photos are dark. Night stars, no moon. Long exposures, open diaphragm, very high ISO.
- there is a HDR plugin for GIMP - there is hugin_hdrmerge - Merge overlapping images which has a LOT of parameters you can tweak!
Another gimp plugin?
- there is Luminance HDR Luminance HDR is an open source graphical user interface application that aims to provide a workflow for HDR imaging.
I've tried this and its very good
I'll have a look.
- there is openexr, which I haven't tried - these is pfstools
And of course there is the powerful manipulation command line tool ImageMagick, which can do pretty much anything you want, and which I'd look at first in your case. it has some GUI front ends/wrappers from 3rd parties.
- there are options in other photoprocesing tools such as Darktable
Notice that this tool has to examine the photos and shift them around so that they do overlap. The camera is on tripod, but the stars shift. I don't know if the correct thing is to match the stars or the very dark landscape. -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar)
On 28/12/17 13:44, Carlos E. R. wrote:
On 2017-12-28 13:51, Anton Aylward wrote:
On 28/12/17 05:25 AM, Carlos E. R. wrote:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Hopefully each image has a lot of the landscape in common so they can be aligned.
I didn't move the camera for the entire session, using a tripod. It is the sky which moves, ie, the Earth which rotates.
Good ...
The normal tools to do this kind of overlay are for HDR. It assumes you are overlaying a +1 and - over/under exposure to ewnhance the image. I won't go into the why of HDR. But it does overlay the images and combine them as you point out.
All photos are dark. Night stars, no moon. Long exposures, open diaphragm, very high ISO.
- there is a HDR plugin for GIMP - there is hugin_hdrmerge - Merge overlapping images which has a LOT of parameters you can tweak!
Another gimp plugin?
- there is Luminance HDR Luminance HDR is an open source graphical user interface application that aims to provide a workflow for HDR imaging.
I've tried this and its very good
I'll have a look.
- there is openexr, which I haven't tried - these is pfstools
And of course there is the powerful manipulation command line tool ImageMagick, which can do pretty much anything you want, and which I'd look at first in your case. it has some GUI front ends/wrappers from 3rd parties.
- there are options in other photoprocesing tools such as Darktable
Notice that this tool has to examine the photos and shift them around so that they do overlap. The camera is on tripod, but the stars shift. I don't know if the correct thing is to match the stars or the very dark landscape.
The worry is that HDR tools will be useless. They assume that the photos were taken fractions of a second apart, and that the camera didn't move between shots. If the earth moves between shots, that will throw them completely :-) If Hugin has the ability to overlay the detail in the images, then it certainly has the ability to align the stars. The easiest option (but a lot of work) might be to align the photos as layres in gimp, and then make them transparent so other meteors shine through. I'd try searching an astronomy list, or maybe look at apod (https://apod.nasa.gov/apod/astropix.html), they have forums. Cheers, Wol -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 28/12/17 09:47 AM, Wols Lists wrote:
The worry is that HDR tools will be useless. They assume that the photos were taken fractions of a second apart, and that the camera didn't move between shots. If the earth moves between shots, that will throw them completely :-)
The earth didn't move with respect to the camera. I've seen HDR done with a morning-noon-evening set of images; clouds moved, sun angle changed but the 'object' didn't move. Carlos said
I don't know if the correct thing is to match the stars or the very dark landscape.
As I mentioned, I've seen time-lapse shots of the moon with a fixed landscape. It depends on the effect he wants, and I suggest he tries both to see how they look.
If Hugin has the ability to overlay the detail in the images, then it certainly has the ability to align the stars.
Be sure to mention that to Charles Stross. -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 28/12/17 16:27, Anton Aylward wrote:
On 28/12/17 09:47 AM, Wols Lists wrote:
The worry is that HDR tools will be useless. They assume that the photos were taken fractions of a second apart, and that the camera didn't move between shots. If the earth moves between shots, that will throw them completely :-) The earth didn't move with respect to the camera.
I've seen HDR done with a morning-noon-evening set of images; clouds moved, sun angle changed but the 'object' didn't move.
In other words, the PICTURE was stationary relative to the camera. In the OP's case, the earth (taking the camera with it) moved relative to the picture. I've done this sort of thing myself, and you get subject movement blur after about 30 *seconds* so depending on how long it was between shots, the earth (and camera) would have moved considerably relative to the picture. Cheers, Wol -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Le 28/12/2017 à 18:08, Wols Lists a écrit :
I've done this sort of thing myself, and you get subject movement blur after about 30 *seconds* so depending on how long it was between shots, the earth (and camera) would have moved considerably relative to the picture.
yes, and stars are no more a point but a pretty long line that's why telescopes uses moving mounts (moving in inverse way than earth) jdd -- http://dodin.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Wols Lists wrote:
On 28/12/17 13:44, Carlos E. R. wrote:
On 2017-12-28 13:51, Anton Aylward wrote:
On 28/12/17 05:25 AM, Carlos E. R. wrote:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Hopefully each image has a lot of the landscape in common so they can be aligned.
I didn't move the camera for the entire session, using a tripod. It is the sky which moves, ie, the Earth which rotates.
This might create some issues, as the position of the stars relative to each other will change due to lens distortions....
The worry is that HDR tools will be useless.
I think so, too. They assume unchanged scenery, and will at most handle the shooting stars as noise. So my approach to this would be: Load the photos in Hugin. Probably the autodetection of control points will not work, so you'd have to define some (more/many) manually. The more pairs you define over the FOV, the better can hugin determine the lens distortions an nicely map the images ontop each other. (hugin has a standalone align_image_stack program, you could try that first, but I don't expect it to work nicely for such images...) Then align the images, and export the aligned images separately (normally they would be removed after stitching - there's a 'keep' button somewhere in the stitch menu). Then they should all be really nicely co-aligned. Depending on the focal length of your camera you could use rectangular geometry (default would be equirectangular...) Load those in GIMP as layers, and set the mode of the stacked layers to 'lighten only'. That way the shooting stars will have proper intensity, which they wouldn't when doing averaging. You have to see how the (high-ISO) noise plays bad here - you'd also tend to collect the hot pixels this way. In doubt do some noise reduction on them before the averaging. Another try would be the GMIC plugin of GIMP. It also has a lot of fancy image addition algorithms (I especially like the median summing against hot pixels - but this would also remove the shooting stars...) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Op donderdag 28 december 2017 14:44:21 CET schreef Carlos E. R.:
On 28/12/17 05:25 AM, Carlos E. R. wrote:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Hopefully each image has a lot of the landscape in common so they can be aligned. I didn't move the camera for the entire session, using a tripod. It is
On 2017-12-28 13:51, Anton Aylward wrote: the sky which moves, ie, the Earth which rotates.
The normal tools to do this kind of overlay are for HDR. It assumes you are overlaying a +1 and - over/under exposure to ewnhance the image. I won't go into the why of HDR. But it does overlay the images and combine them as you point out.
All photos are dark. Night stars, no moon. Long exposures, open diaphragm, very high ISO.
- there is a HDR plugin for GIMP - there is hugin_hdrmerge - Merge overlapping images
which has a LOT of parameters you can tweak!
Another gimp plugin?
- there is Luminance HDR
Luminance HDR is an open source graphical user interface application that aims to provide a workflow for HDR imaging.
I've tried this and its very good
I'll have a look.
- there is openexr, which I haven't tried - these is pfstools
And of course there is the powerful manipulation command line tool ImageMagick, which can do pretty much anything you want, and which I'd look at first in your case. it has some GUI front ends/wrappers from 3rd parties.
- there are options in other photoprocesing tools such as Darktable
Notice that this tool has to examine the photos and shift them around so that they do overlap. The camera is on tripod, but the stars shift. I don't know if the correct thing is to match the stars or the very dark landscape.
A bit off-topic: why not create an animation of it ? Numerous apps available that can generate an mp4, gif ... -- Gertjan Lettink, a.k.a. Knurpht openSUSE Board Member openSUSE Forums Team -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 28/12/17 10:40 AM, Knurpht - Gertjan Lettink wrote:
A bit off-topic: why not create an animation of it ? Numerous apps available that can generate an mp4, gif ...
I *like* that! -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday, 2017-12-28 at 16:40 +0100, Knurpht - Gertjan Lettink wrote:
A bit off-topic: why not create an animation of it ? Numerous apps available that can generate an mp4, gif ...
Yes, that was easy. :-) I created a video some days ago: time ffmpeg -r 3 -pattern_type glob -i 'DSC_*.jpg' -vcodec mpeg4 -s 718x1080 out3_mpeg4.avi real 4m58.583s user 4m26.939s sys 0m3.816s This created a 3'33" video. I also tried: ffmpeg -r 1 -pattern_type glob -i 'DSC_*.jpg' -c:v libx264 -s 720x480 out.mp4 ffmpeg -r 1 -pattern_type glob -i 'DSC_*.jpg' -c:v libx264 out.mp4 But the result is unviewable in Xine (full of artifacts) and crashes VLC. Besides, I thought that jpg would be easier to convert to mpeg4 codec. The result is not that good, because my lenses are not wide angle enough to capture enough of the sky. In reality, the sky show was spectacular, awesome. And cold, for us here :-) I filled the 32 GB memory card of the camera, 640 photos. Only 1 really worth it, other 12 of "pse..." value. I never thought I could take so many photos in a day - 32 GB is not enough! :-o I used hits from this google search: https://superuser.com/questions/624567/how-to-create-a-video-from-images-usi... another: http://hamelot.io/visualization/using-ffmpeg-to-convert-a-set-of-images-into... empty site: https://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlpFUUsACgkQtTMYHG2NR9UxPgCfczAz4JcI3AuqkCnVjH5JwpBZ zrYAoJNM3hMenpxySGZShIuqC3XwA/FN =SZAN -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday, 2017-12-28 at 21:17 +0100, Carlos E. R. wrote:
On Thursday, 2017-12-28 at 16:40 +0100, Knurpht - Gertjan Lettink wrote:
A bit off-topic: why not create an animation of it ? Numerous apps available that can generate an mp4, gif ...
Yes, that was easy. :-) I created a video some days ago:
time ffmpeg -r 3 -pattern_type glob -i 'DSC_*.jpg' -vcodec mpeg4 -s 718x1080 out3_mpeg4.avi real 4m58.583s user 4m26.939s sys 0m3.816s
This created a 3'33" video.
The video is here: https://photos.app.goo.gl/hnhZA3zEcqRHYhao1 And some of the photos, those that contain "something". Nothing outstanding :-) ( I have to get a 10 mm wide angle prime :-)~ ) - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlpIEsAACgkQtTMYHG2NR9XvCACdGw/2yU0y4U/wd0HszlmT8wAw UMUAnRJFyLmQ3Ae8bcsxUhQYAJR1f1se =Ubsa -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 28/12/17 08:44 AM, Carlos E. R. wrote:
Notice that this tool has to examine the photos and shift them around so that they do overlap. The camera is on tripod, but the stars shift. I don't know if the correct thing is to match the stars or the very dark landscape.
It depends on the effect you want. I've seen a time-lapse of the moon with fixed landscape and multiple moon images showing its movement. Or you might want to fix the stars and blur the landscape. I think that might be harder. I've done both 'panorama' effect and -2, -1, 0, -1, -2 HDR. Hugin is best for the panorama. Luminance wag for HDR, which I followed up with Darktable. ALL OF THESE take skill and practice and trial and error and try it again to see it different. Keep notes! -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday, 2017-12-28 at 11:22 -0500, Anton Aylward wrote:
On 28/12/17 08:44 AM, Carlos E. R. wrote:
Notice that this tool has to examine the photos and shift them around so that they do overlap. The camera is on tripod, but the stars shift. I don't know if the correct thing is to match the stars or the very dark landscape.
It depends on the effect you want.
I've seen a time-lapse of the moon with fixed landscape and multiple moon images showing its movement.
Or you might want to fix the stars and blur the landscape. I think that might be harder.
I think this is the one I want.
I've done both 'panorama' effect and -2, -1, 0, -1, -2 HDR.
Hugin is best for the panorama. Luminance wag for HDR, which I followed up with Darktable.
ALL OF THESE take skill and practice and trial and error and try it again to see it different. Keep notes!
Yeah, it seems so. - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlpFUaIACgkQtTMYHG2NR9X+/ACePBi26xISyHd29PaRTJKtcovK bpYAnRTBBn7FrEvMptSmmheVQcwVt5sF =6mFQ -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Am 28.12.2017 um 11:25 schrieb Carlos E. R.:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Maybe this could be something? http://www.markus-enzweiler.de/StarStaX/StarStaX.html for win, I guess... -- Daniel Bauer photographer Basel Barcelona https://www.patreon.com/danielbauer http://www.daniel-bauer.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday, 2017-12-28 at 19:15 +0100, Daniel Bauer wrote:
Am 28.12.2017 um 11:25 schrieb Carlos E. R.:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Maybe this could be something? http://www.markus-enzweiler.de/StarStaX/StarStaX.html
Yes, that could be the easiest.
for win, I guess...
Sigh... I also denoised the photos in Windows. There I just click "astronomical noise": http://susepaste.org/30413399 I supposse that's doable in Linux, but there are so many manual configurations that it baffles me what to do. Besides, the Windows program knows exactly my camera. - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlpFVcMACgkQtTMYHG2NR9WDtACeIbKFD7wnJP8TipxfvIFUQ4Ch Y5EAnijNcQesegKG1Hf3XWqoRMJ+Yau0 =sNpG -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Am 28.12.2017 um 21:36 schrieb Carlos E. R.:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
On Thursday, 2017-12-28 at 19:15 +0100, Daniel Bauer wrote:
Am 28.12.2017 um 11:25 schrieb Carlos E. R.:
Hi,
I have a bunch of sky photos with stars and some shooting stars (of 639 photos taken, 13 contain shooting stars, Geminids). I have seen photographs compossed of automatically joining several such photos so that you see one photo with a dozen(s) shooting stars.
How can I do that, in Linux?
(If not in Linux, then Windows)
The application I understand superposes several photos matching the stars one on top of the other (as dots) and the landscape, and then the shooting stars are seen as several lines.
Maybe this could be something? http://www.markus-enzweiler.de/StarStaX/StarStaX.html
Yes, that could be the easiest.
for win, I guess...
Sigh...
I also denoised the photos in Windows. There I just click "astronomical noise":
I supposse that's doable in Linux, but there are so many manual configurations that it baffles me what to do. Besides, the Windows program knows exactly my camera.
I also use win for raw processing because my camera manufacturer only gives software for win/mac. Runs very good in my old XP-Virtualbox. Your stars remind me that I must get out of the city of Barcelona once again to see a real heaven. Last time I saw it a year ago in Sierra Nevada... Maybe the stars turned away from Cataluña, too :-) Happy holidays! Daniel -- Daniel Bauer photographer Basel Barcelona https://www.patreon.com/danielbauer http://www.daniel-bauer.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday, 2017-12-29 at 19:38 +0100, Daniel Bauer wrote:
Am 28.12.2017 um 21:36 schrieb Carlos E. R.:
On Thursday, 2017-12-28 at 19:15 +0100, Daniel Bauer wrote:
Maybe this could be something? http://www.markus-enzweiler.de/StarStaX/StarStaX.html
Yes, that could be the easiest.
for win, I guess...
Sigh...
Oh, I found the app has a Linux version, for Ubuntu, but lower version than the Windows one. I have downloaded it but not yet tried. I also want to try other alternatives propossed here.
I also denoised the photos in Windows. There I just click "astronomical noise":
I supposse that's doable in Linux, but there are so many manual configurations that it baffles me what to do. Besides, the Windows program knows exactly my camera.
I also use win for raw processing because my camera manufacturer only gives software for win/mac. Runs very good in my old XP-Virtualbox.
Your stars remind me that I must get out of the city of Barcelona once again to see a real heaven. Last time I saw it a year ago in Sierra Nevada... Maybe the stars turned away from Cataluña, too :-)
Happy holidays!
Probably a lot of light contamination (is that the correct English term?) near Barcelona. Here I have to be careful with the site I go to depending on the direction on the sky I'm going to aim at. Sierra Nevada is a good place. Actually, Calar Alto Observatory is better, at Almeria. It is a German built observatory, used currently by both countries at 50% share, and it has the largest European telescope in the continent, with a single mirror. The one on the Canary Islands is bigger, but is not the continent and I think uses multiple mirrors. It is possible to park not really near the observatory and take nice sky photos in the cold night. But being high mountain, climate can change fast. The picture you saw were taken near Cabo Cope. - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlpICU0ACgkQtTMYHG2NR9VKIwCfaTduLYVLkz0A0q7W7D/ms6Wl uhwAn2zTYVGdpL6Wfy1zKCsTqEfrEEVb =bqkD -----END PGP SIGNATURE-----
participants (7)
-
Anton Aylward -
Carlos E. R. -
Daniel Bauer -
jdd＠dodin.org -
Knurpht - Gertjan Lettink -
Peter Suetterlin -
Wols Lists