Nonreference Medical Image Edge Map Measure

Figure 4

Applying edge measures in assisting in selecting optimal operating parameters. (a) Original X-ray chest image. (b)–(i) Edge detection results using the Sobel edge detector with the threshold ranging from 0.01 to 0.08. (j) Presented measure plot indicating 𝑇=0.03 as the optimal parameter value. (k) Measure plot of using MGSSIM alone. (l) Yitzhaky’s method indicating 𝑇=0.06 as the optimal parameter value.

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