Rhythm Stacker Mac OS
Recommendations for your start in imaging on the Mac
Moon Stacking Mac OS X Sep 29, 2016 Hi all! I'm looking for a way to stack moon images, any ideas on apps? Using the latest version of OS X (10.11.6), and I've tried. Siril is meant to be Iris for Linux (sirI-L). It is an astronomical image processing tool, able to convert, pre-process images, help aligning them automatically or manually, stack them and enhance final images. In 2017, it also began to work on Mac OS X and Windows. New website: siril.org. Please use it instead of this one for news.
There's a few things that need to be covered here as a starting point. I make some assumptions that you’re familiar with Astronomy, possibly already have a first telescope, and are ready to start taking some images. First you have to make a decision as to whether you want to take photos of the planets and Moon, or if you want to take photos of nebula, star clusters, or galaxies. Basically, the decision between planetary, or deep space objects. These things are not exclusive to each other, and can be done with the same telescope but the results might not be optimal for each choice. Your telescope is probably suited to one or the other. (Edit: If you’re just getting into the hobby, have a look at this article on 5 things to consider if you’re interested in astrophotography.)
Planetary imaging on the Mac
Planetary is fairly straight forward. Large aperture scopes like 6' and above are great for this, and you don't need to have an equatorial mount. Any Alt/Az (Altitude Azimuth) mount will work. A high speed web cam or astro camera and Mac laptop are the only additional entry level hardware requirements. Since most planets are relatively small, the larger the scope, the closer/larger they will look, and the more detail you can get out of your images.
Recommended starting software for planetary imaging:
OACapture - for taking pictures or videos: free
SiriL - for stacking planetary images: free
PixInsight - for processing your planetary images to get the most detail out of them: $230 EUR
Unfortunately planetary processing software is a gap right now on the Mac. You need wavelet processing to get the most detail out of your images, and currently PixInsight is the only real option. There are two other apps that might run on older hardware and operating systems (Lynkeos and Keiths Image stacker), but they're not developed any longer, and crash often on modern hardware. They are however, free applications.
For more advanced options, you might switch out Planetary Imager for FireCapture.
Deep sky object imaging on the Mac
DSO imaging requires a little more effort. Because this type of imaging focuses on long exposure shots, where tracking your object across the sky accurately is a requirement, you'll need a German Equatorial Mount (GEM). These deep sky objects can vary greatly in size, with a large number of them being bigger than earth's moon in the night sky. Because of this, a large scope isn't a requirement to get started. In fact, it's preferable to start with a smaller scope, like an 80mm refractor. The reason for this is that the larger your scope, the more accurate your tracking needs to be, the better your mount needs to be to handle the weight and accuracy. The difficulty (and cost) goes up exponentially with larger telescopes. So start small. All of the telescopes I use are relatively small (under 6' in size), and all fit on my entry level GEM mount, the Advanced VX by Celestron.
Additional requirements are going to be a guiding camera and guide scope. This is essentially a small telescope mounted on top of your main scope, with a guide camera. This camera's job is to watch the star movement, and send corrections to your GEM mount when the mount isn't moving accurately. For entry level equipment, this is a necessity, as these mounts are far from accurate for long exposure imaging.
You'll also need a main imaging camera, and your options vary widely here. You have the option of using a DSLR (maybe you have one already in your possession), or a dedicated astrophotography camera that can do color or mono. Mono is a black and white camera, that when combined with color filters, can achieve a higher fidelity color image than a regular color camera can but with more effort and expense.
Recommended starting software for deep sky imaging:
Cloudmakers Astro Imager - for taking pictures with an astronomy camera: $21.99
Cloudmakers AstroDSLR - for taking pictures with a DSLR camera: $21.99
PHD2 - Guiding software for your guide scope and camera: Free
Astro Pixel Processor - Processing software for your images. $50/year, or $125 to purchase outright.
For more advanced options you might switch out Astro Imager for EKOS. And Astro Pixel Processor for PixInsight, or Star Tools.
Rhythm Stacker Mac Os Download
- 1Siril, a free astronomical image processing software
Siril is meant to be Iris for Linux (sirI-L). It is an astronomical image processing tool, able to convert, pre-process images, help aligning them automatically or manually, stack them and enhance final images. In 2017, it also began to work on Mac OS X and Windows.
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- New website: siril.org. Please use it instead of this one for news and the new documentation and tutorials.
- Current version is 0.99.8.1. See the list of previous versions.
- Free online training and documentation (Web-based or PDF)
- Code source, bug reporting and roadmap is now on gitlab
- Scripts information and download and the list of commands
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Who should use Siril?
Siril is targeted to amateur astronomers having acquired images and wanting to process them in a semi-automatic way. It provides a more user-friendly interface than Iris' command line as well as more modern and powerful processing algorithms, but it is not yet as automated as DeepSkyStacker or Registax. It also provides a basic command line to access various processing functions.
Siril is now fully capable to pre-process and process deep sky images. One feature still missing for planetary images processing is image deformation, but it is still capable of registering and processing them in an elegant way. The new star detection registration is perfect for deep sky images, but there are also two automatic translation-only registrations, one more suited for planetary and bright nebula images, based on Fourier transform, and another more simple targeted at deep-sky images, based on PSF on a single reference star. Additionally, a manual alignment capability makes it also well fitted for amateur astronomers having feature-less or bad quality images that automatic tools fail to align properly.
Professional astronomers generally use 32-bit depth images, but Siril uses only 16-bit images internally (except temporary for stacking). Loading 32-bit images is supported but it will degrade them since they will be converted to 16-bit (version 1.0 will use at least 32-bit depth channels internally). It can still be useful if the intent is to produce public-friendly pictures.
And more generally, people who want to use free software on free operating systems to process images. Siril can even be used to extract previewed frames from many videos formats. For an overview, see some image processing results.
News
For latest news, see our new website: siril.org. For code updates, see our bug and feature tracking system.
We are looking for volunteer translators, for the software and for the documentation. No programming experience is required. See the translation instructions page for software translation. In any case, check the status of your language translation with cyril (at free-astro.org) if you want to help.
The software is now considered stable. If you find a bug and want to report it (please, do!), feel free to report it on the bug report page.
- March 2, 2021
- Together with the new 0.99.8.1 release, we finally updated resources in English such as tutorials and an FAQ, avaiable on the new website siril.org.
- August 14, 2020
- The new 0.99.4 version has been released. This version is a complete refactoring of the application.
- November 4, 2019
- The new 0.9.12 version has been released. This version contains a lot of bug fixes and improvements.
- May 27, 2019
- The new 0.9.11 version has been released. This version contains a new photometric color calibration tool, a lot of bug fixes and optimization.
- January 16, 2019
- The new 0.9.10 version has been released, with bug fixes, and new astrometry tool feature.
- November 26, 2018
- Insight has landed! But the Siril news here is that we migrated our source code and bug management system to gitlab! Please use this modern way of communicating with us about code and problems now. The address of the project is https://gitlab.com/free-astro/siril/ . It's been a long year for us with many unfinished business for the 1.0 version. In the meantime, we are preparing a 0.9.10 stability release for very soon.
- June 7, 2018
- The new 0.9.9 version has been released, with bug fixes, and new script feature.
- February 19, 2018
- A patch of the 0.9.8 version has been released: 0.9.8.3.
- January 31, 2018
- The new 0.9.8 version has been released, with bug fixes, improvements on lucky imaging and Windows integration.
- December 4, 2017
- A new 0.9.8 version is progressing well and will particularly help people working on deep-sky lucky imaging.
- We have also started working on features for the next major version of Siril, version 1.0. The first development, started at the beginning of the year, aims to greatly speed up the display of images and the rendering effects and this looks very promising. Other major developments will be the use of a better precision, floating point, internal image format that will give better results with some algorithms, the parallelisation of preprocessing and the creation of a high quality registration and stacking method for planetary images. It will still take a lot of time, but that will be a fully featured and fast version of Siril. Current 0.9.x versions are stable and already provide great results for deep-sky image processing.
- September 21, 2017
- New release 0.9.7. Click here for past releases. Siril is now available on Windows as a beta version!
- June 20, 2017
- New release 0.9.6. Click here for past releases.
- November 28, 2016
- New release 0.9.5. Click here for past releases. Development of major improvements such as native 32 bit images and GEGL rendering has started.
- October 8, 2016
- A new team member has given a huge effort to bring you a fantastic new multi-language documentation, both browsable and in PDF.
- August 17, 2016
- New release 0.9.4. Click here for past releases.
- October 28, 2015
- First stable version available: 0.9.0. Stability updates and minor improvements will occur in the dedicated 0.9 branch.
- June 10, 2015
- New registration method available! It is now possible to register images with an automatic global star detection tool. The algorithm takes into account the translation and the rotation.
- April 13, 2015
- We have been working hard on accelerating stacking algorithms on multi-core CPUs, giving SER a better support and we are also working on the two main lacks of Siril: taking into account rotation and multi-point in registration, for better deep-sky and planetary registrations. These works are in progress, and will take some weeks to complete.
Many improvements have been done over the previous unmaintained version. The command line has been reactivated in large proportions, see the list of currently available commands on the dedicated Commands page. New commands and features have been and are being developed. For a complete list of features, see the 0.9.7 page, the roadmap, or the list of features below.
Ideas for the future of Siril are stored in the issues tracking system and can be seen by version in the milestones page. The list of known bugs is mixed with it and the full list is available here. The complete changelog is available either in the list of closed bugs or in the code source commits. A summary is available in the news section above and in the page of each release, as well as in the ChangeLog file. If you want to contribute, you are welcome!
Start using Siril / Documentation
Siril's works internally with FITS images, unsigned 16-bit per pixel and per channel. Some other FITS formats are supported. All other image formats you want to process with Siril have to be converted using the Conversion tab, but some sequence files are converted on-the-fly: SER and film sequences supported by ffmpeg (which means nearly all films).
For pre-processing, Siril applies master offset/bias, dark and flat images to the current sequence. These master images thus have to be processed before processing the actual image sequence. Siril currently does not support processing multiple sequences at the same time, so each layer of the final image must be processed independently before assembling them into an RGB image.
A free online course for siril has been set-up and new content is added regularly. Most uses of Siril will be described here with short films and exercices that allow you to learn by yourself and make sure you understood on concrete examples.
A Web-based documentation or PDF format for offline viewing, contain illustrated instructions on how to use particular features of Siril, along with a few videos to illustrate or describe these capabilities.
List of Siril features
New features are being introduced quite regularly. Here is a list of main features:
- Native image format support
- Unsigned 16-bit FITS files (other FITS are converted to this format on-the-fly)
- SER files
- AVI and many other film files, their support is being dropped in favour of SER.
- Image conversion (to the native FITS format only)
- Supported input types: 8-bit and 16-bit BMP, TIFF, JPEG, PNG files, NetPBM binary images, RAW DSLR images.
- Pre-processing of images with multi-channel offset, dark and flat images
- Image registration; supported methods:
- Global star alignment (rotation + translation)
- Translation using DFT centred on an object, generally used for planetary images
- Translation using PSF of a star, generally used for deep-sky images
- Manual translation with two preview renderings of the current image with reference frame in transparency
- Registered sequence export
- Supported export file formats: Siril FITS sequence, SER sequence, uncompressed AVI files, GIF up to 0.9.4, MP4 and WEBM web publishing video formats since 0.9.5
- Optional cropping and resizing of the exported images
- Image stacking, with optional additive or multiplicative normalization
- Summing
- Median
- Average with rejection (percentile, sigma, median, Winsorized and linear fit clipping)
- Pixel minimum or maximum across images
- Enhancement and processing of final images
- Lightness/contrast cursors on each layer, different scaling modes (linear, log, square root, squared, asinh, histogram equalisation), negative and false colour rendering and clipping
- Background removal tool
- Cosmetic correction tool
- A command line for various processing functions, only available from the GUI, see the list of available commands.
- A star finding algorithm with PSF information
- Image compositing tool, combining and aligning multiple layers (2 to 6) with custom colours into a resulting image, with luminance layer support
- Plotting various pieces of information about an image sequence (FWHM, star roundness, periodic error of the mount, amplitude, background level...)
Compilation and installation
See Siril installation page. It documents which binary packages you can get and how to build from source if needed, for multiple operating systems. Siril is a free software, licence is GPL3.
To install standalone binaries, please go to this page, choose the last version and download the binary corresponding to your OS.
Who is behind Siril?
Vincent is a computer scientist (PhD) and uses Siril as an amateur to process images from a Canon EOS, a QSI and a Basler camera on a 410mm telescope.
Cyril is a physicist (PhD), now IT engineer at CNRS, motivating new developments and providing high quality processing algorithms to Siril.
Laurent is a senior IT project manager and also uses Siril to process images from a Canon EOS and a ZWO camera on a 254mm telescope. He manages the formatting of the documentation, using Scenari technology and the Moodle online training.
Mac Os Versions
François Meyer wrote the initial (up to v0.8) versions. Here are the legacy Sourceforge project and website.
Rhythm Stacker Mac Os X
See the AUTHORS file for the complete list of contributors.
Rhythm Stacker Mac Os Catalina
If you like the software, please help us by contributing with the Donate button on the top right. Siril takes us a lot of time and we still have to pay for the servers.