Guess who is using a grey card...

BLD_007 · 8th of August 2012 (Wed)

curiosity is lol... JPL just said we have a target on the rover that the camera uses to calibrate its color. In photography that means a grey card =)

SkyBaby · 8th of August 2012 (Wed)

Haha cool!

AvailableLight · 8th of August 2012 (Wed)

Nice.

Moose408 · 8th of August 2012 (Wed)

Yeah, all of the Mars rovers have had a target, otherwise they couldn't be sure what they were looking at.

stickman513 · 8th of August 2012 (Wed)

Was listening to a radio science program the other day and they were talking about it. Sounds like it has colors on it as well so as to help making color images more accurate and to help with identifying the geology as well. They said these images will be the most color accurate to date of the red planet. They incorporated it into a sundial that they can keep accurate color even in shadow.

watt100 · 9th of August 2012 (Thu)

Quote:

Originally Posted by stickman513

They incorporated it into a sundial that they can keep accurate color even in shadow.

color cards and sundials - low tech devices on a high tech machine

Kolor-Pikker · 9th of August 2012 (Thu)

Quote:

Originally Posted by watt100

color cards and sundials - low tech devices on a high tech machine

Makes sense to me... low-tech devices can serve as a good point of reference in circumstances where we have no other point of reference.
We don't know the color balance of Mars, so we need a reference of colors we do know of, and likewise time on Mars is completely different, so the time reference needs to be managed too, using analog methods (until someone finally decides which time base to use for Mars time).

8th of August 2012 (Wed)	#1
BLD_007 Senior Member Join Date: Feb 2010 Location: Kansas City, Mo Posts: 1,036 IMAGE EDITING OK	Guess who is using a grey card... curiosity is lol... JPL just said we have a target on the rover that the camera uses to calibrate its color. In photography that means a grey card =) __________________ Glass: 8-15 f/4.0L \| 16-35 f/2.8LmkII \| 24-70 f/2.8L \| 70-200 f/2.8L mkII \| 100 f/2.8L Macro \| 300 f/2.8LmkII Bodies: Canon 1d X : Canon 1d mkIV : Canon 50d

8th of August 2012 (Wed)	#2
SkyBaby Senior Member Join Date: Dec 2009 Location: Tehachapi, CA Posts: 1,047 IMAGE EDITING OK	Re: Guess who is using a grey card... Haha cool! __________________ My first DSLR! Canon EOS 50D; EF 28-135mm IS f3.5-5.6 http://www.flickr.com/photos/skys_flickr/

8th of August 2012 (Wed)	#3
AvailableLight Senior Member Join Date: Mar 2012 Location: Chesapeake, VA Posts: 1,208	Re: Guess who is using a grey card... Nice. __________________ AJ Rebel T3i (600D) 18-55 \| 55-250 \| 50 1.8 \| 60 2.8 macro \| 15-85 \| 430 EXII

8th of August 2012 (Wed)	#4
Moose408 Member Join Date: Jan 2006 Location: San Jose, CA Posts: 665 IMAGE EDITING OK	Re: Guess who is using a grey card... Yeah, all of the Mars rovers have had a target, otherwise they couldn't be sure what they were looking at. __________________ Canon 5DmkII \| 24-105mm f/4.0L IS \| 24-70mm f/2.8L \| 17-40mm f/4L \| 70-200mm f/2.8L IS \| 100-400mm f/4.5-5.6L IS \| 50mm f/1.8 Photography Blog \| 500px \| Model Mayhem iPhone App - Photo Shoot List \| Gelholder.com \| FoamCoreStands.com

8th of August 2012 (Wed)	#5
stickman513 Member Join Date: Jan 2011 Posts: 553 IMAGE EDITING OK	Re: Guess who is using a grey card... Was listening to a radio science program the other day and they were talking about it. Sounds like it has colors on it as well so as to help making color images more accurate and to help with identifying the geology as well. They said these images will be the most color accurate to date of the red planet. They incorporated it into a sundial that they can keep accurate color even in shadow. __________________ Doug my gear

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