3.2. Image Acquisition and Preprocessing

Try these first

1. 1.

   What is radiometric correction?

   Hint

   Think about adjusting brightness values.

2. 2.

   Name one technique used in noise reduction.

   Hint

   Consider what type of filter can smooth data.

3. 3.

   What is the main purpose of radiometric correction?

   • To remove atmospheric interference
   • To convert raw DN into calibrated reflectance
   • To align images geographically

   Hint

   Think of what you calibrate to make the data usable.

4. 4.

   True or False: Geometric correction uses Ground Control Points (GCPs) to align images.

   • True
   • False

   Hint

   Recall how coordinates are matched.

5. 5.

   Design a preprocessing workflow for a satellite image intended for agricultural studies, outlining which corrections to apply and why.

   Hint

   What specific challenges does agricultural imagery face?

6. 6.

   Considering different atmospheric conditions, evaluate how they might impact the necessity of atmospheric correction in satellite imagery.

   Hint

   How do environmental factors interfere with light during image capture?