Hi @whwang,

Excellent, transparancy is indeed a multiplicative factor which plays its part.

Creating a normalization method which uses both additive and multiplicative terms for the lokation can be made, but my question would then be:

How to determine which part should be multiplicatively and which part additively. If we have different ISO or…[Read more]

Ideally, we will need both additive and multiplicative.  As you mentioned, the sky brightness can change with time during the night.  So an additive term is needed.  At the same time, a multiplicative term is also needed to account for the change in sky transparency, even if the photographer did not mix different ISO.  And of course, in add…[Read more]

Hi @whwang,

No problem,

” Let’s say the images were taken under different sky brightness (strong light pollution and less light pollution).  So obviously there is a need for an additive term. ”

The additive term is for differences in sky background between your lights indeed due to additive terms like differences in light pollution indeed. Bu…[Read more]

I am still a bit confused by the difference between add-scale and multiply-scale.  Let’s say the images were taken under different sky brightness (strong light pollution and less light pollution).  So obviously there is a need for an additive term.  Also, for some reason, the images were taken with different ISO.  So a multiplicative term is als…[Read more]

Looks like equirectangular is more suitable for a Milky Way pano. I always hate to see a rectilinear projection. The distortion is just too severe.

The 2pi sky pano just cover half of the whole sky, or a hemisphere. Looks to me a fisheye or a stereographic projection would be more suitable.

Another question here.  In the normalization page, one…[Read more]

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 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]

@whwang,

Great, the screenshot gives a lot of usefull information.

First, I see your machine has 16GB of RAM, and APP can only use 2GB at the moment.

If you click on CFG (top left) you can alter the amount of RAM APP can use. For your mosaic, I recommend to increase this to at least 12-14GB. Leave some GBs of RAM for your OS available to…[Read more]

This is the full screenshot when that error happened.  The composition mode is indeed set to full.  And yes, the mosaic is larger than 120 deg.  It’s a 360-deg pano of the Milky Way.

@whwang,

Another question that pops up, is the field of view of your data larger than 120 degrees?

@whwang,

Possibly the error is the result of the 6) Integrate, composition setting. Did you leave it at “reference”?

If so, try the integration with the “full” composition mode. Don’t forget to push the apply mode button.

I should let APP use FULL composition by default when the mosaic mode is used in registration, so I’ll add this to my RFC…[Read more]

Hi Wei-Hao (@whwang),

Thank you for sharing this bug.

I suspect something went wrong in the registration of the mosaic. It would be most helpfull if you can share a screenshot showing the file list panel (bottom panel) which shows all analytical results after 5) normalize.

I would be most interested to see the registration RMS values per panel…[Read more]