Search found 172 matches

by han.k
14 Apr 2019, 16:47
Forum: ASTAP News
Topic: ASTAP program versie 0.9.199. Improved de-mosaic method
Replies: 0
Views: 107

ASTAP program versie 0.9.199. Improved de-mosaic method

With ASTAP version 0.9.199, the de-mosaic method for stacking colour sensor images (OSC) is overhauled. This should improved the final image a lot. Best method is demosaic method is AstroC. The current implementation will recover smoothly the colour of saturated stars (=white) by using the colour in...
by han.k
06 Apr 2019, 12:06
Forum: ASTAP News
Topic: ASTAP version 0.9.197
Replies: 0
Views: 126

ASTAP version 0.9.197

ASTAP version 0.9.197 has been released. These are the major changes: - Fixed a problem with applying dark and flats when selecting multiple images series. - Added the possibility to add the object position using the deepsky database. Double click on RA position in viewer. Intended forJPG, PNG files...
by han.k
30 Mar 2019, 23:22
Forum: ASTAP General
Topic: G17 index location and setup
Replies: 1
Views: 435

Re: G17 index location and setup

1) The g17 files should be in the same directory as the executable. For Linux they should be all at location /opt/astap If the program is not complaining about missing files it should be okay. 2) Secondly the initial location of the image should be available. If your trying to solve FITS files the a...
by han.k
26 Mar 2019, 18:24
Forum: ASTAP General
Topic: ASTAP aborted by invalid floating point operation
Replies: 3
Views: 484

Re: ASTAP aborted by invalid floating point operation

Hello Thomas, Fixed this in version 0.9.193. The problem was cause be the very very high background values. For green up to 42000. The program can now handle these almost maximum value. Try to expose much shorter next time. Maybe 60 seconds. Aligning the images is a problem since many stars are oval...
by han.k
25 Mar 2019, 15:20
Forum: ASTAP News
Topic: ASTAP version 0.9.192
Replies: 0
Views: 270

ASTAP version 0.9.192

ASTAP version 0.9.192 has been released. The stack routine has been modified and the program can now better cope with images with different background values (due to rising Moon, altitude of object). The background values are now aligned prior to stacking and the "sigma clip average" should be bette...
by han.k
23 Mar 2019, 13:47
Forum: ASTAP General
Topic: ASTAP aborted by invalid floating point operation
Replies: 3
Views: 484

Re: ASTAP aborted by invalid floating point operation

Hello Thomas, Sorry for the late response. I like to investigate. Could you reproduce the problem and provide me with some of your files for testing? -Can you load files your using in the viewer (double click on the file list) -Does it happen with all files. What happens if you select a few files on...
by han.k
20 Mar 2019, 21:05
Forum: ASTAP General
Topic: Stacked colour fits
Replies: 21
Views: 5008

Re: Stacked colour fits

Hello Serg, The math is nicely described in the link. Maybe useful for the future. I do something similar for drizzle but with a different and mathematical a simpler approach. I split the pixels in 10x10 so 100 sub-pixels. Then by rounding of each sub-pixel position you will find the correct destina...
by han.k
17 Mar 2019, 18:22
Forum: HNSKY General
Topic: Compilation on Linux
Replies: 1
Views: 360

Re: Compilation on Linux

Hello Patrick, Unit hns_Upla.pas is copyrighted by the publisher since most code was taken from a book. I'm currently in contact with one of the authors and he is in favor of releasing the code under GPL3 but it is up to the book publisher to grant it. I hope to get soon, but the request is already ...
by han.k
16 Mar 2019, 15:55
Forum: ASTAP General
Topic: Blink align images
Replies: 8
Views: 1127

Re: Blink align images

Hello Serg, One image is maybe 80 degrees rotated. I removed a check for a valid solution which was causing problem. Secondly OSC images are difficult to solve prior to calibration and demosaicing. This is not done for blinking. Blinking with these RAW images only work if you first bin the images 2x...
by han.k
15 Mar 2019, 09:38
Forum: ASTAP General
Topic: Blink align images
Replies: 8
Views: 1127

Re: Blink align images

Hello Serg, I checked again here. For my test images it works, so I assume it can't match your images correctly. Maybe I have to add the possibility to bin2x2 the images first. Binning 2x2 is only applied for astrometric stacking but not for star matching at the moment. Sometimes changing the stack ...