1 Erratum to: Med Bio Eng Comput (2005) 43(4):487–492 DOI 10.1007/BF02344730

All results reported in the paper are valid since they have been obtained with the correct expression. The mistake in the reported expression was only due to a typing error.

The following formula:

$$ \begin{aligned}{} & i = 0,1:h[i] = 4{\sqrt 2 }[(1 + ( - 1)^{i} \cos \alpha + \sin \alpha )(1 - ( - 1)^{i} \cos \beta - \sin \beta ) + ( - 1)^{i} 2\sin \beta \cos \alpha )] \\ & i = 2,3:h[i] = 2{\sqrt 2 }[1 + \cos (\alpha - \beta ) + ( - 1)^{i} \sin (\alpha - \beta )] \\ & i = 4,5:h[i] = 1/{\sqrt 2 } - h(i - 4) - h(i - 2) \\ \end{aligned} $$

reported at page 488, should read:

$$ \begin{aligned}{} & i = 0,1:h[i] = [(1 + ( - 1)^{i} \cos \alpha + \sin \alpha )(1 - ( - 1)^{i} \cos \beta - \sin \beta ) + ( - 1)^{i} 2\sin \beta \cos \alpha )]/{\left( {4{\sqrt 2 }} \right)} \\ & i = 2,3:h[i] = [1 + \cos (\alpha - \beta ) + ( - 1)^{i} \sin (\alpha - \beta )]/{\left( {2{\sqrt 2 }} \right)} \\ & i = 4,5:h[i] = 1/{\sqrt 2 } - h(i - 4) - h(i - 2) \\ \end{aligned} $$