Some Definitions

For an 8-bit gray-scale image X and its restored image Y, with pixel indices 1 £ i £ M and 1 £ j £ N, i.e., image size is of M×N pixels.

· Mean Absolute Error (MAE):

MAE =

1 MN

M å i = 1

N å j = 1

|X(i,j)-Y(i,j)|.

· Peak Signal-to-Noise Ratio (PSNR):

PSNR = 10log₁₀

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255²

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1 MN

å i,j

(X(i,j)-Y(i,j))^2

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.

Index

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File translated from T_EX by T_TH, version 1.94.
On 31 Mar 2004, 17:45.