Color mars image

I've made a color image from the raw data available from NASA web
site. The image has been made using the following filters:

red channel: L4
green channel: L5
blue channel: L6

The image can be found at:
http://www.hut.fi/~jitulkki/mars/Sol007-1/Color.jpg

Until today all the color images have been made using filters L2, L5 &
L6. The problem is that L2 is an infrared filter so the images are not
true color. Apparently for this reason, nasa has recolored the images
to look more natural.

Jouni Tulkki wrote:

I've made a color image from the raw data available from NASA web
site. The image has been made using the following filters:

red channel: L4
green channel: L5
blue channel: L6

The image can be found at:
http://www.hut.fi/~jitulkki/mars/Sol007-1/Color.jpg

Until today all the color images have been made using filters L2, L5 &
L6. The problem is that L2 is an infrared filter so the images are not
true color. Apparently for this reason, nasa has recolored the images
to look more natural.

Blue rocks?

Mitchell Timin

--
"Many are stubborn in pursuit of the path they have chosen, few in
pursuit of the goal." - Friedrich Nietzsche

http://annevolve.sourceforge.net is what I'm into nowadays.
Humans may write to me at this address: zenguy at shaw dot ca

"Jouni Tulkki" wrote in message
om...
I've made a color image from the raw data available from NASA web
site. The image has been made using the following filters:

red channel: L4
green channel: L5
blue channel: L6

The image can be found at:
http://www.hut.fi/~jitulkki/mars/Sol007-1/Color.jpg

Until today all the color images have been made using filters L2, L5 &
L6. The problem is that L2 is an infrared filter so the images are not
true color. Apparently for this reason, nasa has recolored the images
to look more natural.

Very nice. I've noticed that many of the images posted seem to be muddy. I
guess that's not a big priority right now.

Jon

"Jouni Tulkki" wrote in message
om...
I've made a color image from the raw data available from NASA web
site. The image has been made using the following filters:

red channel: L4
green channel: L5
blue channel: L6

The image can be found at:
http://www.hut.fi/~jitulkki/mars/Sol007-1/Color.jpg

Until today all the color images have been made using filters L2, L5 &
L6. The problem is that L2 is an infrared filter so the images are not
true color. Apparently for this reason, nasa has recolored the images
to look more natural.

Nice. I now have a new wallpaper.

Nathan

wrote in message ...
Jouni Tulkki wrote:

I've made a color image from the raw data available from NASA web
site. The image has been made using the following filters:

red channel: L4
green channel: L5
blue channel: L6

The image can be found at:
http://www.hut.fi/~jitulkki/mars/Sol007-1/Color.jpg

Until today all the color images have been made using filters L2, L5 &
L6. The problem is that L2 is an infrared filter so the images are not
true color. Apparently for this reason, nasa has recolored the images
to look more natural.

Blue rocks?

Mitchell Timin

I don't know. The colors are not true colors, because each channel
(red, green and blue) has been scaled to fill the entire scale (or so
I think). Since mars is mostly red, this means that green and
especially blue colors are exaggerated. The only thing that is certain
is that they are bluer then the surrounding sand. On the other hand,
the rocks are so brightly blue in the image, that they may well be
slightly blue in reality.

Jouni:

Very interesting. Looks to me like blue-black basaltic lava rocks sitting on a
purple-blue soil, and everything covered with red dust -- all of this under a very
bright light. The surfaces that are relatively free of dust may have been "blown
clean" by air outrushing from the nearby impact of the bouncing lander.

The "contrast-enhamcement" makes items look very much brighter than they realy are.
Probably only the black shadows are "true color."

I note a low number of "gas bubbles" on the exposed surfaces of the rocks. Not a
"scoria" in sight. This should tell the experts a lot about the kind of "lava" that
cooled to form the rocks.

Dr. Fred J. Gunther (8 years in the Landsat digital image processing trade)

Jouni Tulkki wrote:

wrote in message ...
Jouni Tulkki wrote:

I've made a color image from the raw data available from NASA web
site. The image has been made using the following filters:

red channel: L4
green channel: L5
blue channel: L6

The image can be found at:
http://www.hut.fi/~jitulkki/mars/Sol007-1/Color.jpg

Until today all the color images have been made using filters L2, L5 &
L6. The problem is that L2 is an infrared filter so the images are not
true color. Apparently for this reason, nasa has recolored the images
to look more natural.

Blue rocks?

Mitchell Timin

I don't know. The colors are not true colors, because each channel
(red, green and blue) has been scaled to fill the entire scale (or so
I think). Since mars is mostly red, this means that green and
especially blue colors are exaggerated. The only thing that is certain
is that they are bluer then the surrounding sand. On the other hand,
the rocks are so brightly blue in the image, that they may well be
slightly blue in reality.