Task
Your task is to read this introduction to image enhancement in the spatial domain and explain the concepts of spatial resolution and scale, and techniques to enhance the visualisation of spatial variability in remote sensing data such as low- and high-pass filters, the Fourier transform and semivariogram.
Image Enhancement in the Spatial Domain
[ pdf ]

Source: Smith G, 2002. Image processing in the spatial domain: image enhancement. Manchester: UNIGIS. Modified and updated by Trodd N, 2007.

Task
Your task to demonstrate your understanding of image processing techniques that enhance information in the spatial domain of remotely sensed images by completing these practical exercises.

Spatial Filtering
[ Clark Labs IDRISI32 ]
[ ERDAS IMAGINE ]

[ ENVI ]

 

Fourier Transform Analysis
[ Clark Labs IDRISI32 ]