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1) From the difference between median and max you can see that alignment didn't work and the pictures were not aligned. Why this is so, is hard to tell. Comparing the pictures in the tutorial with ...
Have a look at this introduction to color perception and reproduction. It also contains a comparison of CIE, RGB and CMYK gamuts at the bottom, where CIE represents what the eye can do and RGB and ...
Those pictures you’re trying to reproduce are using mounts to cancel earth rotation, stacking of multiple images and heavy postprocessing. A tutorial workflow can be seen here: https://pixinsight.com/...
If you've done this in absolute darkness and kept the film in absolute darkness: Yes, absolutely. If it received some light: no.
The way I have done it in the past is this: Carry a handheld GPS, which records a GPS track Take your pictures, while carrying the GPS For best results, take a picture of your GPS displaying the ...
Take a look at the Discover Astronomy page over at Linux.com, which gives a comprehensive list.
A misalignment of 1'' leads to a drift of 0.23''/min when the telescope is pointing to the Zenit. See here (in german) Have a look at these formulas here
This is called a Moire pattern and is created by the regular lines of the tiles in the photo interacting with the black grid between the pixels of any computer monitor.
The light scatters around in the camera and reduces contrast by a diffuse light background. Often telescope tubes are fitted with black velvet, so that light is absorbed. This is reduced diffuse ...
These "bends" might be from distortions from your camera's lens, which Hugin will have a hard time correcting for, if you supply only a limited number of pictures. Check the lens distortion parameters ...
You can use Hugin to manually align pictures and you can define masks to define what parts of the pictures are going to be Excluded or stitched. See Hugin website
No, I can't see any physical constraints for mass production of IR sensors. In fact, most sensors in use in DLSRs are IR sensitive and have an IR filter, that means they are sensitive to wavelengths ...
I would say it depends on a couple of things: does it have spikes or sharp edges? could it be used as a club? is it small enough (including your backpack) for carry-on luggage? I would ask at the ...
A pinhole camera will give you primarily lots of interference rings with a laser. Try shining a Laserpointer at it. So you might have to to "decoherence" it somehow, or take this into account in ...
Your're looking for a panaroma stitching software, which is able to do Gigapixels. If you google "How to create a gigapixel image", the usual suspects that turn up are (in no particular order): ...
Most photos of good quality taken of the Milky Way are done using a telescope mount, which counteracts the apparent movement of the stars. In addition, the best ones also use stacking, that means ...
Check out this discussion from Sky and telescope, which gives two options: Shielding and Warming
Make a hologram of your ID card. You have to walk to see both sides, but they will both be there.