Image Histogram Equalization Exercises  

1. For every image, display both the equalized and non-equalized images. Explain what are the main differences between every pair of images. Which image looks the best after equalization?
   
   
2. Image histogram equalization can be useful for the photographer who over-exposed or under-exposed a picture. Why?
   
   
3. What can the negative effect be of image histogram equalization?
   
   
4. Can we do histogram equalization for a sound signal ? Why?