Digital Image Processing

Homework 3, Due 2019/4/23

Problem 1

Histogram Matching

Specify a desired histogram as Figure 3.25(a) on Page 149 and then perform the histogram matching.

Fig3.23(a).bmp

Problem 2

Enhancement Using the Laplacian

Write a program to perform image sharpening. (Figure 3.46, Page 181)

(a) Laplacian image obtained using the kernel in Fig. 3.45(a).

(b) Image sharpened using Eq. (3.54) with c = -1.

(c) Image sharpened using the same procedure, but with the kernel in Fig. 3.45(b).

Fig0338(a).bmp

Problem 3

Combining Spatial Enhancement Methods

Write a program to perform a combination of spatial enhancements. (Figure 3.57, Page 193)

(a) Fig3.43(a).bmp

(b) Laplacian of (a).

(c) Adding (a) and (b)

(d) Sobel gradient of (a)

(e) Smoothed with a 5*5 averaging filter of (d)

(f) Product of (c) and (e)

(g) Sum of (a) and (f)

(h) Applying a power-law transformation to (g)

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