3.3. Image Enhancement Techniques

Try these first

1. 1.

   What is contrast stretching?

   Hint

   Think about how you can make dark areas stand out more.

2. 2.

   What is the purpose of spatial filtering?

   Hint

   What kinds of filters are used to smooth or sharpen images?

3. 3.

   What technique is typically used to improve image contrast?

   • Contrast Stretching
   • PCA
   • Spatial Filtering

   Hint

   Which term implies enhancing visibility?

4. 4.

   True or False: PCA is used to increase the complexity of data.

   • True
   • False

   Hint

   Think about what PCA stands for: Principal Component 'Analysis'!

5. 5.

   Assume you have satellite imagery showing a mixed urban and forested area. How would you apply band ratioing to differentiate land cover?

   Hint

   Which bands do you think are essential for this application?

6. 6.

   You have a noisy satellite image that requires enhancement for better interpretation. Design a workflow that utilizes spatial filtering successfully.

   Hint

   What steps would ensure the clarity of features after filtering?