Skip to main content
47 votes
Accepted

Why does a polarizer lead to these strange visuals above the clouds?

A sheet of glass or plastics will typically have internal stresses. For glass and some clear plastics these lead to the birefringence patterns you see, when you shine (partially) polarized light on ...
ad42's user avatar
  • 854
27 votes
Accepted

Why is film still used in aerial imaging applications?

I do not think it is preferred; it's just a last vestige of film... it has no real technical advantage. IMO the only reason it remains viable and in use is because the cost of conversion is quite high....
Steven Kersting's user avatar
27 votes

Why is film still used in aerial imaging applications?

Film has some advantage over digital for certain kinds of imaging and image storage. First, a genuinely huge amount of information can be stored in a modestly sized film negative (with my flatbed ...
Zeiss Ikon's user avatar
  • 7,140
14 votes

How is this changing vertical perspective effect achieved?

This picture is a composition of slices of many photos taken from different heights, likely from a drone. The key to understanding it is to examine the camera's perspective or point of view from ...
scottbb's user avatar
  • 32.9k
7 votes
Accepted

Red-channel rolling shutter in google maps?

Very early color reconnaissance cameras did, in fact, use a color wheel in front of a camera with B&W film. At that time the resolution available with B&W was superior to that of color film. ...
Michael C's user avatar
  • 175k
4 votes

Red-channel rolling shutter in google maps?

Satellite photos are often taken that way, with multiple linear sensors ("push broom scanners") that each detect different frequencies, mounted in such a way that they pass over a given point on the ...
dgatwood's user avatar
  • 2,255
3 votes

What are the focal lengths required for aerial photography in alt range 400-1200m?

For non-wide-angle lenses, and subject distances much larger than the lens's focal length (your use-case certainly applies), the imaging system obeys the following basic equality: ...
scottbb's user avatar
  • 32.9k
3 votes
Accepted

How can I tell what my military camera was used for?

The K-20 was near ubiquitous among U.S. Army Air Force units that did any kind of photographic reconnaissance. You'd literally be looking for a needle in a haystack. It's highly unlikely you could ...
Michael C's user avatar
  • 175k
3 votes
Accepted

Recreate aerial photograph: find correct position

draw VERTICAL lines through selected landmarks in your photo draw lines through the same landmarks on the map and find the crossing point repeat using more lines and more landmarks for better ...
szulat's user avatar
  • 5,059
2 votes

How is this changing vertical perspective effect achieved?

According to this article, each image is made of between 18 and 20 photos taken from a drone. It does not say what happens to the sets of images but it would most likely be a software process that ...
Itai's user avatar
  • 103k
2 votes

Difference between a "camera at three broad spectral bands" (sic.) and a standard RGB camera?

It does not seem to be substantially different from standard CMOS sensor other than the fact that most Illunis cameras seem to be based on CCD rather than CMOS chips. The three color bands centered on ...
Michael C's user avatar
  • 175k
2 votes

Why is film still used in aerial imaging applications?

Films can be made very large very easily, while digital sensors not so much. A digital sensor beyond 645 format is more or less reserved for military or space applications, while a 8x10 offers much ...
user3528438's user avatar
1 vote
Accepted

How could I stabilise an aerial camera in one axis?

I would recommend looking at single axis solar tracker designs for the mechanical design. These will be some form of motor connected to a plate (Where the camera could mount) that get close to 180° ...
Sneaky Puffin's user avatar
1 vote
Accepted

Capturing aerial night photos during plane takeoff

Not sure if there's much you can do. The airplane is moving so you have to keep shutter speed up, and theres not much light to work with. Only thing you could do is upgrade your equipment. Go buy a ...
Daniel K's user avatar
  • 126
1 vote

Why do I get pinkish tint on some photos in DJI Mavic 2 Pro hyperlapse?

The images are DNG, so they undergo processing by Adobe. Most likely, there is an auto white balance set (or another colour setting), and it can easily be inconsistent, esp. in such difficult ...
Zeus's user avatar
  • 1,549
1 vote

How to calculate the correct position for this inception style photo

While calculation should be possible, I would rather recommend trial and error to begin. Start with your drone filming as it ascends. Then take screenshots from still-frames from the video. Do your ...
youcantryreachingme's user avatar
1 vote

What is the x and y camera gimbal angle for a drone?

If I were going to calibrate a drone's image "footprint," assuming that the camera reports the gimbal angles (otherwise you have no way to make a measurement), I'd either hang or hover the drone over ...
Carl Witthoft's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible