3.3.2. Spatial Filtering

Try these first

1. 1.

   What is the main purpose of spatial filtering in image processing?

   Hint

   Think about what we aim to see better in images.

2. 2.

   Name one type of spatial filter.

   Hint

   Remember, one filter emphasizes and the other smoothes.

3. 3.

   What is a high-pass filter used for?

   • Smoothing an image
   • Removing noise
   • Emphasizing edges

   Hint

   Remember its role in helping to define features more clearly.

4. 4.

   True or False: Low-pass filters are primarily used to emphasize features in an image.

   • True
   • False

   Hint

   Consider what low-pass filters do to features in an image.

5. 5.

   How could you combine high-pass and low-pass filters to enhance satellite imagery for disaster management?

   Hint

   Consider what type of details are needed during a disaster evaluation.

6. 6.

   In what ways might using just one type of filter limit the analysis of satellite images?

   Hint

   Think about the risks of focusing solely on one aspect of an image.