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. 2016 May 18;43(6):2948–2964. doi: 10.1118/1.4948679

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© 2016 American Association of Physicists in Medicine.

0094-2405/2016/43(6)/2948/17/$30.00

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FIG. 4. — Calculation of local image statistics. (a) Plot of up_Ω with points of interest pe and kn. (b) The gradient of up_Ω. (c) The gradient with added center bias to detect j_low. (d) Deriving j_hi from ${\tilde{u p_{Ω}}}^{'}$ . Points on the curve that are labeled with low and hi mark the location of indices j_low and j_hi, respectively.