True colors and Mars

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

Michael wrote:

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

That's only partially right. The problem with using the IR filter is
that it is difficult to reproduce the colors over the entire spectrum;
in other words they can get the color of mars right, the color of the
sky right, or the blues on the lander right, but they can't get them all
right at once. Read that sentence again you skeptics out there because
it's the main thing to be understood.

There aren't any blues on mars. So it is possible to reproduce the soil
with badly calibrated blues. The colors of the images have been
approximately correct all along for the Martian landscape because those
are the colors they have elected to reproduce faithfully. The sky may
be a bit off, and the blues on the lander are way off. But the rocks
and soil are close.

This image released today should settle this question ounce and for all:
http://www.jpl.nasa.gov/mer2004/rover-images/jan-30-2004/Spirit_Sol26_med.jpg

Note that the color calibration target appears with the proper colors
(+/- the response of your display device) with the Martian rocks and
soil in the background.

I'll say it again: The colors of the images have been approximately
correct all along for the Martian landscape because those are the colors
they have elected to reproduce faithfully.

So for the last time: the soil and rocks are close to the correct colors
in all of the images thus far released.

--
Greg Crinklaw
Astronomical Software Developer
Cloudcroft, New Mexico, USA (33N, 106W, 2700m)

SkyTools Software for the Observer:
http://www.skyhound.com/cs.html

Skyhound Observing Pages:
http://www.skyhound.com/sh/skyhound.html

To reply remove spleen

Michael wrote:

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

That's only partially right. The problem with using the IR filter is
that it is difficult to reproduce the colors over the entire spectrum;
in other words they can get the color of mars right, the color of the
sky right, or the blues on the lander right, but they can't get them all
right at once. Read that sentence again you skeptics out there because
it's the main thing to be understood.

There aren't any blues on mars. So it is possible to reproduce the soil
with badly calibrated blues. The colors of the images have been
approximately correct all along for the Martian landscape because those
are the colors they have elected to reproduce faithfully. The sky may
be a bit off, and the blues on the lander are way off. But the rocks
and soil are close.

This image released today should settle this question ounce and for all:
http://www.jpl.nasa.gov/mer2004/rover-images/jan-30-2004/Spirit_Sol26_med.jpg

Note that the color calibration target appears with the proper colors
(+/- the response of your display device) with the Martian rocks and
soil in the background.

I'll say it again: The colors of the images have been approximately
correct all along for the Martian landscape because those are the colors
they have elected to reproduce faithfully.

So for the last time: the soil and rocks are close to the correct colors
in all of the images thus far released.

--
Greg Crinklaw
Astronomical Software Developer
Cloudcroft, New Mexico, USA (33N, 106W, 2700m)

SkyTools Software for the Observer:
http://www.skyhound.com/cs.html

Skyhound Observing Pages:
http://www.skyhound.com/sh/skyhound.html

To reply remove spleen

Michael wrote:

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

That's only partially right. The problem with using the IR filter is
that it is difficult to reproduce the colors over the entire spectrum;
in other words they can get the color of mars right, the color of the
sky right, or the blues on the lander right, but they can't get them all
right at once. Read that sentence again you skeptics out there because
it's the main thing to be understood.

There aren't any blues on mars. So it is possible to reproduce the soil
with badly calibrated blues. The colors of the images have been
approximately correct all along for the Martian landscape because those
are the colors they have elected to reproduce faithfully. The sky may
be a bit off, and the blues on the lander are way off. But the rocks
and soil are close.

This image released today should settle this question ounce and for all:
http://www.jpl.nasa.gov/mer2004/rover-images/jan-30-2004/Spirit_Sol26_med.jpg

Note that the color calibration target appears with the proper colors
(+/- the response of your display device) with the Martian rocks and
soil in the background.

I'll say it again: The colors of the images have been approximately
correct all along for the Martian landscape because those are the colors
they have elected to reproduce faithfully.

So for the last time: the soil and rocks are close to the correct colors
in all of the images thus far released.

--
Greg Crinklaw
Astronomical Software Developer
Cloudcroft, New Mexico, USA (33N, 106W, 2700m)

SkyTools Software for the Observer:
http://www.skyhound.com/cs.html

Skyhound Observing Pages:
http://www.skyhound.com/sh/skyhound.html

To reply remove spleen

"Greg Crinklaw" wrote in message
...
Michael wrote:

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not
the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

That's only partially right. The problem with using the IR filter is
that it is difficult to reproduce the colors over the entire spectrum;
in other words they can get the color of mars right, the color of the
sky right, or the blues on the lander right, but they can't get them all
right at once. Read that sentence again you skeptics out there because
it's the main thing to be understood.

There aren't any blues on mars. So it is possible to reproduce the soil
with badly calibrated blues. The colors of the images have been
approximately correct all along for the Martian landscape because those
are the colors they have elected to reproduce faithfully. The sky may
be a bit off, and the blues on the lander are way off. But the rocks
and soil are close.

This image released today should settle this question ounce and for all:

http://www.jpl.nasa.gov/mer2004/rove...it_Sol26_med.j
pg


Look, if they can't get the JPL logo right (it's blue, not red) then they
are not getting anything right. We "sceptics"
as you so idiotically decided to say, want the true colors and they said
they will use a true red filter in the future.

This was a something I reported afetr watching a report on discovery.ca last
night. The colour red is wrong on the Marsdial.
So "almost" doesn't cut it either. If I took a 35mm SLR color photo on
mars, I would ge the real colours as seen on Mars.
This is the real issue. Color as seen on Mars, relative to earth. Who
knows, the real color may have a reddish hue all around as filtered
through the Mars atmosphere thereby washing out any real colors from the
landscape. They should let us decide and just show us instead
of low balling us figuring they are "doing the public a favor".

"Greg Crinklaw" wrote in message
...
Michael wrote:

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not
the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

That's only partially right. The problem with using the IR filter is
that it is difficult to reproduce the colors over the entire spectrum;
in other words they can get the color of mars right, the color of the
sky right, or the blues on the lander right, but they can't get them all
right at once. Read that sentence again you skeptics out there because
it's the main thing to be understood.

There aren't any blues on mars. So it is possible to reproduce the soil
with badly calibrated blues. The colors of the images have been
approximately correct all along for the Martian landscape because those
are the colors they have elected to reproduce faithfully. The sky may
be a bit off, and the blues on the lander are way off. But the rocks
and soil are close.

This image released today should settle this question ounce and for all:

http://www.jpl.nasa.gov/mer2004/rove...it_Sol26_med.j
pg


Look, if they can't get the JPL logo right (it's blue, not red) then they
are not getting anything right. We "sceptics"
as you so idiotically decided to say, want the true colors and they said
they will use a true red filter in the future.

This was a something I reported afetr watching a report on discovery.ca last
night. The colour red is wrong on the Marsdial.
So "almost" doesn't cut it either. If I took a 35mm SLR color photo on
mars, I would ge the real colours as seen on Mars.
This is the real issue. Color as seen on Mars, relative to earth. Who
knows, the real color may have a reddish hue all around as filtered
through the Mars atmosphere thereby washing out any real colors from the
landscape. They should let us decide and just show us instead
of low balling us figuring they are "doing the public a favor".

"Greg Crinklaw" wrote in message
...
Michael wrote:

JPL is using an IR filter instead of real red in the RGB mix for it's
photos. So everything so far is
not true Martian red. It is altered to bring out features for JPL not
the
public. People have been
fooled so far thinking that Mars landscape is actual color but not
intentionally. Later they plan to use
the real red filter.

That's only partially right. The problem with using the IR filter is
that it is difficult to reproduce the colors over the entire spectrum;
in other words they can get the color of mars right, the color of the
sky right, or the blues on the lander right, but they can't get them all
right at once. Read that sentence again you skeptics out there because
it's the main thing to be understood.

There aren't any blues on mars. So it is possible to reproduce the soil
with badly calibrated blues. The colors of the images have been
approximately correct all along for the Martian landscape because those
are the colors they have elected to reproduce faithfully. The sky may
be a bit off, and the blues on the lander are way off. But the rocks
and soil are close.

This image released today should settle this question ounce and for all:

http://www.jpl.nasa.gov/mer2004/rove...it_Sol26_med.j
pg


Look, if they can't get the JPL logo right (it's blue, not red) then they
are not getting anything right. We "sceptics"
as you so idiotically decided to say, want the true colors and they said
they will use a true red filter in the future.

This was a something I reported afetr watching a report on discovery.ca last
night. The colour red is wrong on the Marsdial.
So "almost" doesn't cut it either. If I took a 35mm SLR color photo on
mars, I would ge the real colours as seen on Mars.
This is the real issue. Color as seen on Mars, relative to earth. Who
knows, the real color may have a reddish hue all around as filtered
through the Mars atmosphere thereby washing out any real colors from the
landscape. They should let us decide and just show us instead
of low balling us figuring they are "doing the public a favor".

Greg Crinklaw wrote:
So for the last time: the soil and rocks are close to the correct colors
in all of the images thus far released.

If only our CRTs, LCD, TFT monitors and printers were so carefully
calibrated! And don't even start on TVs. My laptop is so bad I only
do graphics work on it when I have no other choice.

It's kind of funny to look around any room with multiple TV-like devices
all showing the same picture and see how different they are. It was
even true of the TV monitors in the Von Karmann auditorium at JPL when
I was there on Spirit landing night.

Mojo
--
Morris Jones *
Monrovia, CA

http://www.whiteoaks.com

Greg Crinklaw wrote:
So for the last time: the soil and rocks are close to the correct colors
in all of the images thus far released.

If only our CRTs, LCD, TFT monitors and printers were so carefully
calibrated! And don't even start on TVs. My laptop is so bad I only
do graphics work on it when I have no other choice.

It's kind of funny to look around any room with multiple TV-like devices
all showing the same picture and see how different they are. It was
even true of the TV monitors in the Von Karmann auditorium at JPL when
I was there on Spirit landing night.

Mojo
--
Morris Jones *
Monrovia, CA

http://www.whiteoaks.com

Greg Crinklaw wrote:
So for the last time: the soil and rocks are close to the correct colors
in all of the images thus far released.

If only our CRTs, LCD, TFT monitors and printers were so carefully
calibrated! And don't even start on TVs. My laptop is so bad I only
do graphics work on it when I have no other choice.

It's kind of funny to look around any room with multiple TV-like devices
all showing the same picture and see how different they are. It was
even true of the TV monitors in the Von Karmann auditorium at JPL when
I was there on Spirit landing night.

Mojo
--
Morris Jones *
Monrovia, CA

http://www.whiteoaks.com