Image enhancement techniques have been implemented in many digital image applications. The quality of image is important to the human visual system interpretation. Contrast is one of elements in the visual properties that make an object distinguishable from other object and the background. The human visual system is more sensitive to the contrast image. Based on Figures 1 and 2, answer the following questions: (a) (b) Figure 1. (a) Original image, (b) The histogram of the original image.

100 90 136 90 125 140 132 125 136 90 130 140 140 90 125 132 Figure 2: Original image representation a) Considering the image in Figure 2, illustrate the calculation of Histogram equalization technique with the intensity scale 1-255 in order to widespread the contrast.