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Messages - Pleiades

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76
Announcements / PCL 01.00.01.060 RC1 Standard Distribution Released
« on: 2006 February 23 09:53:14 »
PCL Version 01.00.01.060 RC1  is now available, incorporating a few bug fixes, optimizations, and a number of changes to the low-level C API that allows communication between modules and the core PixInsight application.

Due to these low-level changes, modules compiled with previous versions of PCL will no longer be valid, and must be recompiled with current build 60. We apologize for the inconveniences.

Build 60 incorporates a new Timer class. The Timer class allows you to execute code at specified intervals. Timer provides one-millisecond timing resolution, although its accuracy is platform-dependent.

Have fun!
The Pleiades Development Team

77
Announcements / New Website / Updated PixInsight Forum
« on: 2006 February 22 10:47:31 »
Hello Everyone,

Take a look at our new website, which we have uploaded today:

http://pleiades-astrophoto.com/

We hope you'll like it. The in-depth changes reflect the beginning of a new and crucial phase in our project: The PixInsight Standard application and the PCL development framework.

The PixInsight Forum has also been updated significantly. Many new sections and forums have been created, including a section specific to PCL development.

All of you are invited to participate actively in this forum. If you have any question or issue related to PixInsight, this is the right place to post it!

If you have any image processed with PixInsight, we'll appreciate if you post a link on the Gallery forum. It is the best place to share your work with other PixInsight users. The Gallery forum is also open for discussion and critique on posted images and related processing topics.

If you have any idea to improve the PixInsight application, or if you have some suggestion about new functionality that you'd like to see implemented in incoming releases, the Wish List forum is perfect for you.

Finally, developers and interested programmers are encouraged to post on the PCL Development forums. It is the best place to learn PCL programming and PixInsight module development techniques.

See you all on the Forum. Enjoy!

The Pleiades Development Team

78
Hi all,

Trolltech AS, a worldwide software company from Norway, has selected PixInsight as Cool Application on their website. I just wanted to share my excitement with all of you on this forum.

Trolltech are the creators of Qt, a cross-platform application development framework around which I am building most of the GUI of the new PixInsight application:
http://www.trolltech.com/products/qt/

Qt is in the core of numerous essential software projects, both open source and commercial, as the KDE desktop environment for example, and guarantees portability of our application across MS Windows, Linux and Mac OS X.

This is the page with Trolltech's selected Cool Applications; among them you'll find PixInsight's feature at the top of the list:
http://www.trolltech.com/products/hotnew/

Regards,
Juan

79
New PixInsight LE version 1.0.2 includes the DynamicBackgroundExtraction process (DBE among friends), an interactive system for correction of uneven illumination and color in deep-sky images. Virtually all types of vignetting and sky gradients can be accurately fixed with DBE.

The update archive for LE 1.0.2.143 is ready for download on our server. Although there is no official documentation for DBE yet, we have authored a new tutorial on vignetting and gradient correction with this tool, with some worked examples and detailed explanations for all parameters. All the details are on PixInsight's website.

Version 1.0.2 also includes an upgraded SGBNR process. SGBNR can now use a (inverse) luminance mask, which is generated transparently. This feature has not been documented, but I'm sure that those of you that were accustomed to the old standalone SGBNR application will have no problem at all with it :) A documentation update will be available very soon. Of course the new SGBNR is fully backwards-compatible, so all of your existing process icons will continue working.

As always, your comments, suggestions, criticisms, and bug reports are very welcome.

Best Regards,

Juan Conejero
___________________________________________________________

Juan Conejero, Pleiades Astrophoto Team
juan.conejero__at__pleiades-astrophoto.com
PixInsight Home Page: http://pleiades-astrophoto.com/pixinsight/
___________________________________________________________

80
Hi all,

I have just finished a new processing tutorial. It is here:

http://pleiades-astrophoto.com/pixinsight/help/tutorials/nrexample/en.html

This document explains a noise reduction technique based on the application of wavelets processing and SGBNR in PixInsight LE 1.0.1.

Thanks to Richard Crisp for giving me permission to use one of his CCD raw images to build a step-by-step processing example.

I hope this tutorial will be much clearer and easy to understand than a similar document included in the official documentation. I've used a lot of mouse over comparisons and explained in detail many critical aspects of the procedure.

Any suggestions and criticisms are welcome.

All the best,

Juan Conejero
___________________________________________________________

Juan Conejero, Pleiades Astrophoto Team
juan.conejero__at__pleiades-astrophoto.com
PixInsight Home Page: http://pleiades-astrophoto.com/pixinsight/
___________________________________________________________

81
Announcements / PixInsight LE Build 142 Update Available
« on: 2004 December 10 10:59:22 »
LE Build 142 is now available for download as a WinRAR self-extracting archive. A link to the update module and instructions for installing it can be found on the downloads page:

http://pleiades-astrophoto.com/pixinsight/downloads.html

This new build fixes a minor bug found while rewriting core application routines. The bug is related to the FITS file format and may cause improperly rescaled pixel values when reading 16-bit unsigned FITS images, under certain unusual conditions.

Users working with FITS files should install this update as soon as possible.

Clear skies and good seeing,

Juan Conejero
___________________________________________________________

Juan Conejero, Pleiades Astrophoto Team
juan.conejero__at__pleiades-astrophoto.com
PixInsight Home Page: http://pleiades-astrophoto.com/pixinsight/
___________________________________________________________

82
1. Process Icons. Replacing the process instance owned by a process icon object, by dragging and dropping other icon, or a process drag object from a processing window, was not working after having deleted one or more process icons.

2. Masked process instances in ProcessContainer objects were not working properly, giving some weird errors related to swap files.

3. Histograms Window. If the output histograms panel was hidden (by unchecking the Output check box), the process drag object was disappearing from this window at startup. the only way to recover it was to check the Output check box again, exit the program, and launch it again.

4. Histograms Window. The state of the Lock check box was not being restored from the Windows registry.

5. Preferences Window. After changing some items affecting the appearance of the main window, it was not being correctly updated until the next program execution.

6. Process Icons. Sometimes, when creating a process icon by dragging a process drag object from a processing window, and dropping it to the main window's work area, the icon just created was not correctly drawn on the screen.

7. Image View Context Menu. Both Zoom In Mode and Zoom Out Mode menu items were showing just "Zoom".

8. MedianFilter / MinMaxFilter. Circular kernels were being incorrectly generated. This was affecting especially the 3x3 and 5x5 filter kernels.

9. ATrousWaveletTransform. Noise reduction filters with 3x3 kernels were not working properly.

10. Real-Time Preview Window. Having a preview selected on the Real-Time Preview window, when executing a process on the same preview object (e.g., by dragging a process drag object), the real-time version of the preview image was not updated properly.

11. Real-Time Preview Window. Having a preview selected on the Real-Time Preview window, when restoring the preview object, the real-time version of the preview image was not updated.

12. Process Container Window. Fixed some weird behavior of drag/drop operations.

13. Process Container Window. An access violation error was being caused by dragging a process to move it to the last position in the ProcessContainer sequence.

14. Processing History Window. Clicking on the green checkmarks / red 'x' marks to enable/disable a process in the ProcessContainer was not working properly because the clicked item was not selected on the process list.

15. Filter Manager Dialog (for A Trous Wavelets and Convolution). After having loaded or saved a filter set module (.pi-fsm file), no more filter editing was possible because some interface elements on the dialog box remained (incorrectly) disabled.

16. Preview Properties Dialog. After clicking OK on this dialog, the current preview identifier was changed even though the user had not changed it.

17. ProcessContainer. Under some circumstances, process instances belonging to a ProcessContainer object were not executed correctly if a mask was required. This happened for previews exclusively; when applying ProcessContainer to images there was no problem with masked processes.

18. Color Management. Improperly generated look up tables (LUT) were yielding inaccurate renditions of color images on the screen, especially for some particular ICC profile spaces, as Adobe RGB(1998) and other wide gamut spaces. This problem was causing visible blue casts and excessively saturated colors over bright image areas. Note that this error affected onscreen renditions exclusively, not color transformations performed on actual pixel values. This bug was catched by Pere Sanz, who reported it to the PixInsight Forum.

19. Color Management. The File > Save command (Ctrl-S) was producing image files with embedded ICC profiles, even though the original image did not have an embedded profile and the Embed Profiles option of Color Management Setup was disabled. Note that this was not happening with File > Save As (Shift-Ctrl-S). Now the following criteria are strictly applied for File > Save:

    If the image has no assigned ICC profile, no profile is embedded if the Embed Profiles option of Color Management Setup is disabled. If this option is enabled, the default (working) profile is embedded.
     
    If the image has an assigned ICC profile, it is always embedded, regardless the current state of the Embed Profiles option of Color Management Setup. This is to prevent losing existing profile data. If you actually want no profile embedded in the file, use File > Save As.

___________________________________________________________

Juan Conejero, Pleiades Astrophoto Team
juan.conejero__at__pleiades-astrophoto.com
PixInsight Home Page: http://pleiades-astrophoto.com/pixinsight/
___________________________________________________________

83
Hi all,

This is to inform you that we have just released a new version of the freeware limited edition of PixInsight. You can download it from the PixInsight Home Page:

http://pleiades-astrophoto.com/pixinsight/

PixInsight LE 1.0.1 includes the powerful wavelets processing tools implemented in the standard version of PixInsight (under development), plus a new flexible and versatile Pixel Math tool, also from the standard version. Full details can be found on our website.

The official documentation has been completely revised and updated with new chapters, processing examples and lots of mouseover comparisons. The entire documentation is available online.

We have also two new online tutorials: basic histograms and curves adjustments, by Vicent Peris, and a new flat-fielding technique for film astrophotography developed by Carlos Milovic.

Hope you'll find it useful. Comments welcome.

Clear skies and good seeing,

Juan Conejero
___________________________________________________________

Juan Conejero, Pleiades Astrophoto Team
juan.conejero__at__pleiades-astrophoto.com
PixInsight Home Page: http://pleiades-astrophoto.com/pixinsight/
___________________________________________________________

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