常用的英語縮寫含義

SAD（Sum of Absolute Difference）=SAE（Sum of Absolute Error)即絕對誤差和

SATD（Sum of Absolute Transformed Difference）即hadamard變換後再絕對值求和 

SSD（Sum of Squared Difference）=SSE（Sum of Squared Error)即差值的平方和 

MAD（Mean Absolute Difference）=MAE（Mean Absolute Error)即平均絕對差值 

MSD（Mean Squared Difference）=MSE（Mean Squared Error）即平均平方誤差

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