posted on Dec, 2 2012 @ 02:04 PM
Originally posted by PeterGriffin
reply to post by stirling
So all the money that went into "Curiosity" and it's sending back black and white photos?
First of all, this is from Spirit
, and not Curiosity
Secondly, the way the cameras on Spirit
worked was by taking multiple images of each scene through a series of filters, with each filter
creating different intensities of gray-scale for different colors. Those multiple images -- in RAW image form -- were in gray-scale, but after they
were transmitted back to Earth, computers put those multiple gray-scale images (as seen through the various filters) together to create a color
And before you ask "why don't they do it the same way my Canon or Nikon camera does it"
-- the answer is that they DO (basically)....
Even your color digital camera's light sensor is really "color blind" -- it can only "see" in different shades and intensities of gray. Each time you
take a picture, the image is run through a "Bayer" filter which creates multiple versions of the same image, but seen through the different colors of
the 'Bayer" filter. The computer in your camera than takes these different versions of the image, and puts then together into a color image the you
see. This all takes about a second.
NASA Imaging scientists felt that they could actually get more information from Spirit's
images if they get the raw
versions seen through the various filters, and combining them here on Earth, rather than letting the spacecraft combine the images into a color image.
I think they felt some information could be lost that way.
main camera, a Bayer-type filter is included, so the color images are created on board the rover prior to transmitting back to
earth. I'm not sure exactly why the on-board Bayer filter was used this time. maybe it was because too many people cried "why are the pictures black
edit on 12/2/2012 by Soylent Green Is People because: (no reason given)