Re:black and white?
by
CheshireCatCO
·
· Score: 4, Informative
Oh, no. They really have colors. You get the images from the CCDs in black and white because you have to take one expose through each filter (which is then just a map of intensity at that waveband). But you then add the images to get color.
HST images (as well as other telescopes's outputs) tend to be false colored for two reasons:
1. Because stretching the color tables often brings out subtle details. You can see this is a true and stretched image of Jupiter, for example.
2. Many (most maybe even) HST images include wavelengths that we can't actually see, into the IR and UV. If you want to see those wavelengths, you'll have to false color.
I do sort of wish that they'd always include a little note in the captions stating that the color tables have been stretched or otherwise manipulated. But they seldom do. It's just a dream I have.
Re:Great picture, now can we see it in true colors
by
Anonymous Coward
·
· Score: 1, Informative
Looking for more info on how Hubble images are colorized? Check this info page out.
Slashdot Mirror
Oh, no. They really have colors. You get the images from the CCDs in black and white because you have to take one expose through each filter (which is then just a map of intensity at that waveband). But you then add the images to get color.
HST images (as well as other telescopes's outputs) tend to be false colored for two reasons:
1. Because stretching the color tables often brings out subtle details. You can see this is a true and stretched image of Jupiter, for example.
2. Many (most maybe even) HST images include wavelengths that we can't actually see, into the IR and UV. If you want to see those wavelengths, you'll have to false color.
I do sort of wish that they'd always include a little note in the captions stating that the color tables have been stretched or otherwise manipulated. But they seldom do. It's just a dream I have.
Looking for more info on how Hubble images are colorized? Check this info page out.