Day 4: Thursday, July 9, 2015

The biggest advancement we made today was figuring out how to layer bands into a single file.  This morning, Anna and I worked to learn how to do this, but were interrupted by a fire drill and eventually resorted to asking for Dr. Vodecek's help.  However, Dr. Vodecek was unfamiliar with the newest version of ENVI and decided to ask other ENVI users if they could help.  After this, he came to the conclusion that the older version of ENVI (ENVI Classic) would better suit our purposes for our research.  After helping us, Dr. Vodecek came to the conclusion that the older version of ENVI (ENVI Classic) would better suit our purposes for our research.  After a brief introduction to the software (which has many of the same features and is, in my opinion, easier to use than the current version of ENVI), we began to work on our projects.  I first downloaded satellite data of New York City from USGS to test the functionality of NNDiffuse Pan Sharpening, which uses the algorithm that I will test through my research.  However, I was unable to download a color image onto ENVI Classic, and therefore had to use a low-resolution (30m pixel) black and white image in conjunction with the sharper (15m pixel) black and white Band 8 image for the image sharpening function.  As a result, the sharpened image seemed almost as precise as the Band 8 image.  However, when I use a low resolution color image instead of a black and white one, the data displayed through the color should make up for the slight loss in accuracy due to the sharpening function.