reply to post by vze2xjjk
OK, I have found the original image.
The panorama is
this one and the area with that large rock is visible in
images
2P132405671EFF1800P2287L2M1,
2P132405735EFF1800P2287L5M1 and
2P132405789EFF1800P2287L6M1.
To see the difference, here you can see the different versions available.
This is from the false colour panorama.
All the images bellow are from the L5 filter.
This is from the Rovers' site, the one most people see.
This is the "browse" version available on the Online Data Volumes - Mars Exploration Rover (MER) site from the PDS Imaging Node. As this is a browse
version is also a JPG file, but it looks completely different from the one available on the site.
This is from the "data" version, a IMG file that I converted to PNG, so it has not any compression artifacts added. As you can see, just the fact
that it's not a JPG makes some difference.
And this is the above image after a "levels adjustment" using The GIMP.
Having access to the original IMG file allows you to do the processing you want without having previous processing affecting your work.
This is my false colour version of the image.
ATTENTION: this image was made using the infrared filter instead of the red, so the red is not as accurate as it could have been.
This is the full image.
For those interested in doing some work with the original images, the PDS Imaging Node page for the Rovers is available
here, NASAView (a program to work with the IMG files) is available
here. As an alternative, you can use version
The GIMP version 2.2.xx (I use version 2.2.16) and
this plugin
to open IMG files.