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Correlation coefficient of splash image (512 × 512); (a–c) Correlation coefficient of plain splash image for three directions of a = Horizontal (H-D), b = Diagonal (D-D) and, c = Vertical (V-D). (d–f) Correlation coefficient of encrypted splash image for three directions of d = Horizontal (H-D), e = Diagonal (D-D) and f = Diagonal (V-D).
