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- From: mccreary@sword.eng.hou.compaq.com (Ed McCreary)
- Subject: Re: NSSDC Data on CD-ROM
- Message-ID: <1992Dec7.153708.17327@twisto.eng.hou.compaq.com>
- Sender: news@twisto.eng.hou.compaq.com (Netnews Account)
- Organization: Compaq Computer Corp.
- References: <1992Dec3.055229.29600@elroy.jpl.nasa.gov> <3DEC199208170642@b56vxg.kodak.com> <Byronx.E1B@well.sf.ca.us>
- Date: Mon, 7 Dec 1992 15:37:08 GMT
- Lines: 37
-
- In article <Byronx.E1B@well.sf.ca.us> shiva@well.sf.ca.us (Kenneth Porter) writes:
- >> Yes. Keep in mind the images are the raw unprocessed data from Voyager.
- >> The images are black and white.
- >
- >So where does the color come from that we see in the news? Is the
- >original data in color and the CD just omits it, or is the color
- >synthesized somehow?
-
- The Voyager vidicon camera are B&W. The imaging unit has a color wheel
- with several different colored cels. I believe there are nine different
- filters. The folks at the JPL Image Processing Lab (IPL) combine
- the red, green, and violet images together to produce a color image.
-
- Theorectically this is trivially done, but the three images are not
- aligned. Therefore, you must know the position and orientation of
- the spacecraft relative to the subject of the picture in order to
- align the three images and then combine them into a single picture.
-
-
- >And does the retrieval software have all of the neat histogram stuff
- >that we saw as the images came in live? It would be cool to play with
- >false color on these images. [Coming soon to a rock video near you?]
-
- IMDISP is released with the disk and is available on ames.arc.nasa.gov.
- It has the capability to manipulate the histogram of the image and
- used a pseudocolor palette.
- >
- >The lack of good marketing on this stuff demonstrates once again why
- >the space program needs to be in private hands (unless it's Commodore!).
-
- Note that these are meant for research purposes. You can get nice
- clean pictures from NASA easily.
-
- --
- Ed McCreary ,__o
- mccreary@sword.eng.hou.compaq.com _-\_<,
- "If it were not for laughter, there would be no Tao." (*)/'(*)
-