##Infrared compositing## If you have [near-infrared imagery](/tool/near-infrared-camera) you can composite that imagery with the visible-light imagery to see how healthy the vegetation is. * [NDVI and NRG compositing](/wiki/ndvi) * [Video: Creating infrared composites of aerial wetlands imagery](https://www.youtube.com/watch?feature=player_embedded&v=pv6xB0y-rX4) - Learn to combine infrared and visible-light photographs (taken from balloon photography) to produce an "NRG" composite, where reddish color indicates photosynthesis. * [Video: Creating false-color NDVI with aerial wetlands imagery](https://www.youtube.com/watch?v=-nNnWEHNO_w) - Learn to use the open-source GIMP application to create a Normalized Differential Vegetation Index image from infrared and visible-light aerial photographs. Also explore false-color techniques for presenting the data. ##Contrast adjustments## Stretch the contrast and saturation of your images to see more detail, especially underwater. Read more here: * http://publiclaboratory.org/notes/warren/10-25-2011/using-colorcontrast-enhancement-see-water-aerial-photos ...