Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.photo.digital,sci.electronics.repair,alt.home.repair
|
|||
|
|||
How does Google Imaging & satellite spying photo analysis work?
On 05/19/2014 12:55 PM, Liam O'Connor wrote:
I'm a layman, so, keeping it at lay-talk, fundamentally, how does Google Images recognize two images as having the same provenance? And, is it similar to how software find tanks and missiles in a spy satellite photo? What I have been told is that they both do an FFT on the pixel information, and, from that detailed frequency data, they look for characteristic "signature patterns". But, I know no more than that (and even that may be wrong). Can you shed light (in layman's terms) on this process? Lots of DSP, trial and error involved in calibration and proofing. Mostly automated, ground penetrating radar, bizarre optical wavelengths, magnetometers, etc. all integrated in proprietary computer systems. Between the oil companies and the spooks, remote sensing is very mature and still very secret. FFT analysis can make anything more visible, to a point. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
How does Google Imaging & satellite spying photo analysis work? | Electronics Repair | |||
Picasaweb, Google+ and link-to-photo | UK diy | |||
OT Does anyone know of a free calendar that works like Google or Yahoo that allows you to upload a photo? | Home Repair | |||
How to print & frame a roughly 5'x10' google satellite view on awall | Home Repair | |||
(cargo?) WARM HEAVY work-pants? (google not much help) | Home Repair |