241–250 of 390 posts
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The cars aren't flying at altitude though. They're farther from the satellite.
How low are these satellites? I wouldn't expect the altitude of a plane to be any significant proportion of the altitude of a satellite.
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Have you considered including a source that supports your statement?
I googled it and came up with multiple answers. Instead of demanding people prove their work, take reasonable statements in good faith imo.
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Interesting. Sadly, I believe the Photoshop approach would not produce a DNG file that you could normally interpret in a raw processor of your choice. Looks like pixel shift cameras (which apparently still use Bayer sensors, just moving them around, to debayer at capture time so to speak) is the most practical option at the moment. I’m curious if it is technically possible for a digital sensor to capture the entire l…
There are Sigma cameras with a Foveon sensor that can do it: https://en.wikipedia.org/wiki/Foveon_X3_sensor Though they're not as good in most other dimensions as conventional Bayer filter sensors (most Amazon reviews e.g. say that it's impossible to photograph moving human subjects without daylight iirc).
I'm aware that USA spends about 1 tril a year on military stuff but these just seems bizarre to me.
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These are pushbroom linear sensors stacked up in the focal plane. The spectral channels are physically separated by larger distance than neighboring pixels in a Bayer grid. There is a time delay between each channel sweeping over the same location that gets corrected when the final imagery is aligned. The moving plane at altitude violates assumption of a static scene and exposes the scanning behavior.
For anyone wondering about what a pushboom sensor is - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.72.... Basically a 1D sensor that acquires a 2D image because the camera itself is moving. In this case, I'd imagine that there are 3 such sensors for RGB.
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The cars aren't flying at altitude though. They're farther from the satellite.
How low are these satellites? I wouldn't expect the altitude of a plane to be any significant proportion of the altitude of a satellite.
Earlier quoted context omitted.
These are pushbroom linear sensors stacked up in the focal plane. The spectral channels are physically separated by larger distance than neighboring pixels in a Bayer grid. There is a time delay between each channel sweeping over the same location that gets corrected when the final imagery is aligned. The moving plane at altitude violates assumption of a static scene and exposes the scanning behavior.
Exactly! I'm working on some stuff now to exploit this very effect, the small time difference in the bands can be used to find velocities of moving objects.
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The B-2 Spirit is insane. People usually know the SR-71, but I personally think the B-2 is straight up savage - aesthetically alien, impossibly aerial, and incomprehensibly powerful. Its silhoutte is terrifying: https://i.imgur.com/WqMvxXg.jpg What a beast: https://www.northropgrumman.com/what-we-do/air/b-2-stealth-b...
That's while probably really effective at its job, it's not really the most of anything. The B-1B for example is faster and can carry more ordinance.