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Indeed, looks very good to me as well Will be very nice to combine with RGB data for a HaRGB  or LHaRGB composite ;-)

“Too little overlap between the panels might cause the issue. “Hollandse zuinigheid”, I’ll send you all (6) panels.”

Great, I will have a thorough look to see if we can improve this 😉

What would be the minimum required overlap as a %-age of frame width/height?

I would say, that APP needs about 10% of frame width/height for most cases but it strongly depends on several factors.

– the amount of detected stars at the borders of the frames, the more stars detected, the less % it needs.

– the pattern recognition engine creates…[Read more]

Excellent @hansvanoverzee ! Glad to help ;-)

Indeed, flats will help the result a lot. So focus on creating good flats.

Another focus point would be to improve tracking of the object. You’ll notice the noisy stripes in your data. This could be a result of not using a guide camera. So only using the mount to track the object. For each exposure,…[Read more]

Hi Wei-Hao,

“For the orientation, now I can see why the image in the previous screen shot is tilted.  Among all the panels, one is tilted relative to the Galactic plane, and that one happened to be picked by APP as the reference.”

Murphy’s Law I guess… 😉

“To be clear, after I launch APP, its icon appears immediately, but it takes 2 to 3…[Read more]

Too little overlap between the panels might cause the issue. “Hollandse zuinigheid” ;-) I’ll send you all (6) panels.

What would be the minimum required overlap  as a %-age of frame width/height?

For the orientation, now I can see why the image in the previous screen shot is tilted.  Among all the panels, one is tilted relative to the Galactic plane, and that one happened to be picked by APP as the reference.

My OS is MacOS 10.10.5. The machine is a 3.4GHz i7 iMac with 16GB of RAM.  The OS and apps are all stored in a 1TB-SSD*2 RAID0 e…[Read more]

Hi Wei-Hao (@whwang),

“1. I believe I used equirectangularProjection instead of the standard rectlinearProjection.  I might be wrong.”

Okay, the equirectangular projection only becomes possible after calibrated projective registration. Let me know if this works tomorrow ;-)

“2. I also did try a small subset of the panels to start with.  APP c…[Read more]

Hi @mauricetoet,

Looks like this seam has very little overlap for the two adjacent frames. This could be the reason this seam isn’t registered like it should. You could try triangles instead of the quadrilaterals for this in the pattern recognition, but registering the mosaic while take quite a bit longer.

I think I need an addition in the…[Read more]

Thank you very much @bula. I did some further experimenting with your suggested settings, especially for analysing stars (3). Still need to tweak / further experiment with the settings. Whats happens is that at one of the seams I get double stars; see attachment. In the end I cheated and mixed two versions (with double stars at different postions)…[Read more]

Hi Mabula,

I will try with your recommended parameters tomorrow.  Here are a few additional related and unrelated points.

1. I believe I used equirectangularProjection instead of the standard rectlinearProjection.  I might be wrong.

2. I also did try a small subset of the panels to start with.  APP can process them successfully.  Please see the…[Read more]

Dank voor dit videootje, die had ik nog niet gezien. Ja, links naast de 3 knotwilgen (linkerkant foto) en over het terrein van de buren kan ik makkelijk langs … dat mag geen probleem zijn.

Zijn nog best grote panelen, gaat dat goed lukken met achterom brengen?