3.2.4. Noise Reduction

Try these first

1. 1.

   What is image noise?

   Hint

   Think about what makes an image unclear.

2. 2.

   Name one technique used for noise reduction.

   Hint

   Which filter would smooth an image?

3. 3.

   What is a common effect of noise in satellite images?

   • Enhanced clarity
   • Obscured features
   • Improved texture

   Hint

   Think about how you would describe a noisy image.

4. 4.

   True or False: Gaussian filters can effectively remove salt-and-pepper noise.

   • True
   • False

   Hint

   Which filter do you think is designed for that kind of noise?

5. 5.

   A new satellite image shows excessive noise that affects urban landscape analysis. Propose a strategy using at least two different filtering techniques.

   Hint

   Consider how each filter impacts edges and overall quality.

6. 6.

   You are tasked with comparing the impact of using Median and Gaussian filters on detecting minor urban features in a satellite image. Provide a detailed analysis.

   Hint

   Think about how different filters react to varying types of noise.