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Image Enhancement for Mineral Identification
CosmicRocker
post Oct 18 2011, 06:55 AM
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I'm not sure that those filter combinations will be more helpful than the one I posted. We need something that specifically targets the infrared fingerprint of hematite, like this image of Snout in Eagle Crater. I'm waiting for a good R5 so I can make one of those.


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I'm not a Space Fan, I'm a Space Exploration Enthusiast.
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CosmicRocker
post Oct 19 2011, 06:00 AM
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The enhanced color images you guys have made definitely help us better see the spherical clasts in this soil. I wonder if we'll get any MIs.
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Bill: You are right about that file name. It gives the recipe for the R, G, and B channels of the composite image. At first I didn't know how to divide two images, but a friend who is an image processing expert showed me how to do it. I use Photoshop, but I am sure other software has similar abilities. If there is interest in the topic, we can start a thread in "Image Processing Techniques." I'll try to summarize the process here.

For example, to divide R1 by R2, I would create an image with two layers...R1 on top and R2 below. I leave R2's blending mode as a "normal," but set the R1 blending mode to "screen." Next, I insert an adjustment layer between R1 and R2 and set it to "invert." Finally, I merge all the layers together into one flat image that will be R1/R2. The terminology I am using is from my old version of Photoshop. Your software may call these modes and layers by other names.


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