Tuesday, October 17, 2017

Spatial Enhancement Techniques

This week's lab focused on applying different filtering techniques to images to achieve certain effects.  Both ERDAS Imagine and ArcGIS were used to achieve these effects.  Some filters would add some blur to the image while others would sharpen edges and pixels.

My map this week applied a few different filters that were aimed at minimizing the striping effect on the base image while preserving as much detail as possible.  My map below illustrates my process of using a Fourier Transformation filter followed by using spatial convolution filters.  The convolution filters were applied in the following order: Sharpen 3x3, High 3x3, and then Low 3x3.  The result can be seen below.


Striping could not be fully eliminated, however I was able to get it to better blend with the medium greys in the image.  I was also able to maintain decent detail in the urban areas as streets and city blocks can still be easily distinguished.  

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