Live From Mars was active July 1996-December 1997.
Mars Mystery Spot:
In this mini-lesson you will process the image of Warrego Vallis.
This image came from the Viking Orbiter's Mission to Mars.
The information below is about the image you will be using:
Original Image file name=WV/MI40S092.IMG
NOTE- All longitudes on Mars are measured to the west,
You have just changed the Lookup Table (LUT) for one of your images. You
can adjust the LUT with the LUT tool in the tools window. IT is the
horizontal line with a vertical arrow sticking out top and bottom
(directly above the upper case A in the NIH Image Tool Box. Click on
this tool and move up and down in the LUT window, noting the changes.
NOTE-remember to use the coordinate tool and the info table to get your
data. You can also use the magnifying tool to make it easy to see one
pixel at a time.
Now go Options to gray scale and remeasure that exact pixel's luminosity.
Write down the values.
Next.....
NOTE- to apply a filter to just one part of your images, select that
part with the rectangle tool. It is the tool to the right of the
magnifying glass in the tools window and looks like a row of marching
ants when applied)
In the program NIH Image you process (filter) images from the "Process"
menu. Experiment with filter options, getting a feel for what tools
give your eyes the most information about the features known as Warrego
Vallis. You can go to the Undo item in the Edit menu in the command line
to undue the last action you took filtering the image.
(NOTE- DO NOT SAVE ANY CHANGES TO ANY IMAGE WHEN CLOSING)
Reopen the image again.
Go to and select "Load Macros" in the "Special" Menu in the command line.
Select "More Macros" from the Macro folder which should be in your NIH
Image Folder.
You now have a set of macros in the Special Menu in the command line. One
of those macro selections in your Special menu is "ASCII Dump".
Now select a portion of one image with the rectangle tool, that is about
one millimeter square ( in other words just select a speck of the image
with the rectangle tool). With the selection made, go to the "ASCII
Dump" in the "Special" Menu and let go.
Click once back on the image with your old selection still in place. Now
filter it once from the process menu using the filter of you choice.
Now redue the ASCII Dump and compare the number tables. Is there a
difference?
Student Handout for Lesson 1C
Processing the image of Warrego Vallis
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