Image Processing Reference
Fig. 4.31 Eight binary images
Exercise 6: Look at the histogram in Fig. 4.30 . Does it come from a dark or bright
Exercise 7: Look at the histogram in Fig. 4.30 . Does it come from an image with
high or low contrast?
Exercise 8: Histogram stretching is performed on the histogram in Fig. 4.30 .After
histogram stretching a pixel has the value 128. What value did this pixel have
before histogram stretching?
Exercise 9: Calculate the cumulative histogram of image f 2 (x, y) in Fig. 4.29 .
Exercise 10: How will the threshold algorithm look like if two threshold values are
used instead of just one?
Exercise 11: Explain the two automatic thresholding methods and discuss their dif-
Exercise 12: Given the two binary images A and B in Fig. 4.31 . How can logic
operations be applied to generate the binary images: C, D, E, F, G, and H?
Exercise 13: The two images f 1 (x, y) and f 2 (x, y) in Fig. 4.29 are added together.
Calculate the 8-bit output image?
Exercise 14: The image f 2 (x, y) in Fig. 4.29 is inverted and alpha blended with
f 1 (x, y) where α
0 . 5. Calculate the output image.
Additional exercise 1: Describe the motivation for using gamma-correction in im-
age capturing and visualization.
Additional exercise 2: Find and describe alternative automatic thresholding meth-