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  Indian J Med Microbiol
 

Figure 4: Using the Gaussian (c and f) and Sobel (b and e) filters and its effects on the image histogram (values in b and e histogram are expressed in the form of ×105)

Figure 4: Using the Gaussian (c and f) and Sobel (b and e) filters and its effects on the image histogram (values in b and e histogram are expressed in the form of ×105)