5.17.2.A. Image Histogram

Try these first

1. 1.

   What does the x-axis in an image histogram represent?

   Hint

   Think about what digital values are typically used in images.

2. 2.

   What type of histogram would indicate the presence of two distinct features?

   Hint

   Consider how peaks relate to features in the image.

3. 3.

   What does a bimodal histogram indicate?

   • A uniform tone
   • Presence of two classes
   • Poor lighting

   Hint

   Think of what features can be represented in an image.

4. 4.

   True or False: A single-peaked histogram indicates a variable distribution of tones.

   • True
   • False

   Hint

   Consider the relation of peaks to uniformity in tone.

5. 5.

   Analyze a provided histogram. Describe the features it indicates and suggest enhancements.

   Hint

   Refer back to the types of histograms and their significance.

6. 6.

   Given two images with histograms, explain what the histogram shapes imply about potential differences in feature visibility.

   Hint

   Focus on comparing peak numbers and what they might symbolize in the images.