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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
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2015
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Article
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Tab 2
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Research Article
Cryptanalysis and Improvement of an Efficient and Secure Medical Image Protection Scheme
Table 2
Correlation coefficients of adjacent pixels.
Direction
Plain image
Cipher image
Horizontal
0.9532
0.0035
Vertical
0.9301
Diagonal
0.9004
0.0023