3.3.1. Contrast Stretching

Try these first

1. 1.

   What is contrast stretching?

   Hint

   Think about how contrast adjusts what we see.

2. 2.

   Name one method of contrast stretching.

   Hint

   Consider how the adjustments might vary.

3. 3.

   What does contrast stretching primarily improve in satellite images?

   • Color saturation
   • Feature visibility
   • Image resolution

   Hint

   Think about what the technique aims to achieve.

4. 4.

   True or False: Linear contrast stretching applies uniform changes across all pixel values.

   • True
   • False

   Hint

   Consider how the process operates stepwise.

5. 5.

   Given a satellite image with pixel values ranging from 40 to 180, apply linear contrast stretching to find the new values that range from 0 to 255.

   Hint

   Remember to find proportional adjustments for each pixel.

6. 6.

   Discuss how using histogram equalization on an image with an uneven pixel distribution might improve the visual output. Intend to include some benefits or challenges.

   Hint

   Contemplate various levels of brightness and how they interact.