Write computer programs for the following:

Piecewise linear transformation with 2-slope change points and 3-slope levels (see lecture notes figure 3.10). These parameters(r & s) should be variable.

Show your results for a couple of cases for part a, as a minimum, your assignment should include the original image, a plot of various transfer functions, a plot of respective output images, and a comparison of input and output histograms.

 

Ouput gray level, s L-1 3L/4- L2 Image Enhancement in the Spatial Domain L/4 0 -T(r) L/4 L/2 3L/4 Input gray level.r L-1 FIGURE 3.10 Contrast stretching. (a) Form of transformation function. (b) A low-contrast image. (c) Result of contrast stretching. (d) Result of thresholding. (Original image courtesy of Dr. Roger Heady, Research School of Biological Sciences, Australian National University. Canberra, Australia.)