For this weeks module we were tasked with enhancing a .img file of satellite imagery using Erdas Imagine. Utilizing Erdas one can edit an image in an assortment of ways and this module goes into depth into a variety of filters and tools that can be utilized in order to enhance an area to highlight certain features or in the case of l7_striping.img fix large gaps running diagonally through the image caused by satellite processing malfunction. The main tools used in order to correct for this malfunction were the Fourier Transform, Fourier Transform Editor, Spatial Convolution, and Focal Statistics. A preview of the Fourier Editor settings is included in the attached map and shows the technique I used in order to hide the gaps by applying wedge voids to the "star line" gaps. A Spatial Convolution of 3x3 kernel was applied in order to sharpen features in the imagery. The output of these tools was my deliverable final.img. I imported this .img into Arcmap, added essential map elements, and created the layout you see in the attached map.
No comments:
Post a Comment