... is a digital mammogram image, f, showing a small lesion, and Fig. 3.3(b) is the negative image, obtained using the command >> g1 = imadjust(f, [0 1], [1 0]); This process, which is the digital ... input images whose values are outside the range [0, 1] are scaled first using MAT2GRAY Other images are converted to floating point using TOFLOAT For the 'log' transformation,floating-point images ... low, high) 3.3 ■ Histogram Processing and Function Plotting 93 a b Figure 3.6 (a) Bone scan image (b) Image enhanced using a contrast-stretching transformation (Original image courtesy of G E Medical...